FLORA OF LAOS
Gesneriaceae
Didymocarpus sp.?
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Lithophytic rosulate herb on large mossy boulders. Leaved densely silvery hairy. Common.
LA-VN 2200 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Myrsinaceae
Ardisia sp.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Shrub 1-2 m tall on shady rocky river slope. Flowers pink-purple. Occasional.
LA-VN 2199 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Rubiaceae
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Undershrub 1 m tall on shady rocky river slope. Flowers white. Occasional.
LA-VN 2198 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Buxaceae
Buxus sp.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Treelet 2-3 m tall on shady rocky river slope. Fruits greenish. Occasional.
LA-VN 2197 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Zingiberaceae
Alpinia sp.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Terrestrial herb to 1.5 m tall on shady rocky river slope. Tepals white with pinkish base, medial tepal bright yellow. Not rare.
LA-VN 2196 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Podocarpaceae
Dacrydium elatum (Roxb.) Wall. ex Hook.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Tree 14-16 n tall along river. Not common.
LA-VN 2195 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Asclepiadaceae
Hoya verticillata (Vahl) G. Don
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Semi-woody epiphytic and lithophytic vine 4-6 m long in rather open place. Flowers almost odorless, white. Common.
LA-VN 2194 11 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Asclepiadaceae
Hoya fungii Merr.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Semi-woody epiphytic and lithophytic vine to 10 m long in rather open place. Flowers sweet-spicy scented, white, center of corona pink. Common.
LA-VN 2193 11 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Convallariaceae
Peliosanthes teta Andrews
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Lithophytic and occasionally terrestrial large herb on shady mossy boulders and river cliffs. Leaves uniform green, fruits glossy green. Rare, but locally abundant.
LA-VN 2192 11 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Orchidaceae
Dendrobium fimbriatum
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Lithophytic and occasionally epiphytic undershrub to 1.5 m tall. Not rare, locally abundant.
LA-VN 2191 ass. 11 April 2017 Photos only
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Orchidaceae
Arachnis labrosa (Lindl. & Paxton) Rchb.f.?
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Lithophytic and occasionally epiphytic undershrub to 1.5 m tall. Not rare, locally abundant.
LA-VN 2191.1 11 April 2017 Photos only
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Convallariaceae
Tupistra orlovii Aver., N. Tanaka & K. S. Nguyen, sp.nov.
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Lithophytic and occasionally terrestrial large herb on shady mossy boulders and river cliffs. Leaves uniform green, fruits glossy green. Rare, but locally abundant.
LA-VN 2191 11 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
d-EXSICCATES OF VIETNAMESE FLORA 0283/Orlov s.n. & LA-VN 2191 © L.Averyanov
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FLORA OF LAOS
Convallariaceae
Peliosanthes weberi (L.Rodr.) N.Tanaka
Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18°27′25.9′'N 103°08′17.5′'E.
Degraded primary and secondary evergreen dry forest along river on eroded sandstone at elev. About 340 m a.s.l.
Terrestrial herb on shady rocky river slopes. Leaves uniform green, flowers light green, hardly opened. Not rare.
LA-VN 2190 11 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak.
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FLORA OF LAOS
Musaceae
Musa balbisiana Colla.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Giant herb with erect leaves to 5.5 m tall in open rocky slope. Floral bracts brownish to dull purple, flowers yellow. Very common.
LA-VN 2189 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Polypodiaceae s.l.
Adiantum flabellulatum L.?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on mossy tree on rocky mountain slope. Flowers entirely yellow. Rare.
LA-VN 2188 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Pomatocalpa spicatum Breda, Kuhl & Hasselt?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on mossy tree on rocky mountain slope. Flowers entirely yellow. Rare.
LA-VN 2187 6 April 2017 Photos, alc.
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Araceae
Amorphophallus sp.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial ephemeroid tuberiferous herb on rocky mountain slope. Leafless peduncle olive=-brownish with whitish spots. Not common.
LA-VN 2186 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Cymbidium aloifolium (L.) Sw.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Clustering epiphyte and lithophyte near mountain top. Flowers: tepals light dull yellowish with purple-brown median stripe. Very common
LA-VN 2185 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Dendrobium aphyllum (Roxb.) C.E.C.Fisch.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on old mossy trees near mountain top. Flowers: tepals light pink-porple, lip light yellowish to almost white. Common.
LA-VN 2184 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Gastrochilus suavis Seidenf.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte in shady place near mountain top. Not common.
LA-VN 2183a 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
Flowered in 14 November 2018. Flowers odorless, sepals and petals light yellow with fine purple-brown marks, lip white with purple-violet side lobes and orange spot on the center of epichile. L. Averyanov
Flowered in 25 September 2019. Photos. L. Averyanov LA-VN 2183a.1
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FLORA OF LAOS
Orchidaceae
Phalaenopsis gibbosa H.R.Sweet
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte in shady place near mountain top. Flowers white, lip with two yellow spots. Not common.
LA-VN 2183 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Zingiberaceae
Amomum gagnepainii T.L.Wu, K.Larsen & Turland?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial herb to 2.5 m tall on shady rocky slope. Flower buds white. Locally common.
LA-VN 2182 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Bulbophyllum sp.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte and lithophyte on rocky mossy slope near mopuntain top. Locally very common.
LA-VN 2181 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Trichoglottis orchidea (J.Koenig) Garay
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte with pendulous stem to 0.5 m long on old mossy trees on rocky slope near mopuntain top. Flowers: tepals orange, lip white. Very common.
LA-VN 2180 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Dendrobium oligophyllum Gagnep.?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte at base of old mossy trees on rocky slope near mopuntain top. Locally common.
LA-VN 2179 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Acanthaceae
Strobilanthes arborescens sp.nov.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Deciduous treelet 2-4(5) m tall and to 15 cm DBH on open rocky mountain top. Flowers blue. Very common. Main co-dominant of primary scrub on open rocky mountain tops.
LA-VN 2178 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Cycadaceae
Cycas chevalieri Leandri?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial and lithophytic palm-like plant with stem to 30 cm tall and spreading leaves to 2 m long on shady rocky slope. Very common. Male specimen, young cone narrowly ovoid, 10 cm long. LA-VN 2177 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Dendrobium jenkinsii Wall. ex Lindl.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Adpressed epiphyte on old tree on mossy rocky mountain top. Flowers bright yellow. Locally common.
LA-VN 2176 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Cleisostoma williamsonii (Rchb.f.) Garay?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte with pendulous stem on old tree on mossy rocky mountain top. Rare.
LA-VN 2175 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Aerides flabellata Rolfe ex Downie?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on old tree on mossy rocky mountain top. Not rare.
LA-VN 2174 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Nervilia kasiensis S.W.Gale & Phaxaysombath
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial tuberiferous herb with leafless inflorescence to 20 cm tall. Old flowers light brownish. Not common.
LA-VN 2173 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Sarcoglyphis yunnanensis Z.H.Tsi.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on old tree on mossy rocky mountain top. Flowers: tepals light yellowish to pint or almost white, epichile dark purple. Very common.
LA-VN 2172 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Oberonia sp.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphyte on old tree on mossy rocky mountain top. Not common.
LA-VN 2171 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Polypodiaceae s.l.
Pseudodrynaria coronans (Wall. ex Mett.) Ching
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Creeping epiphyte and lithophyte on mossy rocky mountain top. Common.
LA-VN 2170 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Bulbophyllum orectopetalum Garay, Hamer & Siegerist
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Creeping epiphyte and lithophyte on mossy rocky mountain top. Flowers: tepals dull yellowish wirth purple nerves. Locally very common.
LA-VN 2169 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Convallariaceae
Peliosanthes weberi (L. Rodrig.) N.Tanaka
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l. Terrestrial herb on steep shady rocky slope. Flowers dark green, anthers yellowish-white. Not common.
LA-VN 2168 6 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
Herbarium prepared in 07 08 2019, L. Averyanov LA-VN 2168.1, Flowers entirely green. Photos.
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FLORA OF LAOS
Convallariaceae
Peliosanthes weberi (L. Rodrig.) N.Tanaka
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial herb on steep shady rocky slope. Flowers dark green, anthers yellowish-white. Not common.
LA-VN 2168 6 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Dendrobium fimbriatum Hook.
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Epiphytic and lithophytic herb on mossy rocky mountain top. Flowers buds yellow. Very common.
LA-VN 2167 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Opiliaceae
Melientha suavis Pierre
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Tree to 7-8 m tall and 25 cm DBH on shady rocky slope. Very common.
LA-VN 2166 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Cycadaceae
Cycas chevalieri Leandri?
Luang Prabang prov., Pon Xay distr., Nam Bo village, around point 19°57′23.5′'N 102°26′16.4′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 650-750 m a.s.l.
Terrestrial and lithophytic palm-like plant with stem to 30 cm tall and spreading leaves to 2 m long on shady rocky slope. Very common. Female specimen, young sporophylls light pale yellow with short pale orange-browhish indumentum, apex green.
LA-VN 2165 6 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Cleisostoma arietinum (Rchb.f.) Garay
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Epiphyte on tall tree on rocky slope near mountain top. Occasional.
LA-VN 2164 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Asclepiadaceae
Hoya verticillata (Vahl) G. Don
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Creeping semi-woody epiphytic and lithophytic vine on open rocky slope near mountain top. Flowers white, corona white with purple center. Not rare.
LA-VN 2163 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Polypodiaceae s.l.
Antrophyum sp.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Epiphyte on mossy tree on shady rocky mountain slope. Occasional.
LA-VN 2162 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Myrsinaceae
Ardisia sp.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Treelet 3-4 m tall on shady rocky mountain slope. Flowers pink. Occasional.
LA-VN 2161 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Aerides odorata Lour.?
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Epiphyte on mossy tree on mossy rocky mountain top. Flowwer buds white with purple tint. Occasional.
LA-VN 2160 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Araceae
Pseudodraconthium sp.?
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Lithophytic tuberiferous herb in crevices of vertical cliff on mossy rocky mountain top. Leaves velvety dark blue-green above, dark violet below. Rare.
LA-VN 2159 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Dendrobium dixanthum Rchb.f.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Lithophytic clustering herb on open mossy rocky mountain top. Flowers yellow. Not common.
LA-VN 2158 5 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Acanthaceae
Strobilanthes arborescens sp.nov.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Deciduous treelet 2-5 m tall and to 15 cm DBH on open rocky mountain top. Flowers blue. Very common. Main co-dominant of primary scrub on open rocky mountain tops.
LA-VN 2157 5 April 2017 Photos
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Vanda brunnea Rchb.f.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Eriphyte on mossy tree on open mossy rocky mountain top. Flowers brownish. Occasional.
LA-VN 2156 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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FLORA OF LAOS
Orchidaceae
Eria acervata Lindl.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57′37.0′'N 102°25′03.0′'E.
Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l.
Eriphyte on mossy tree on open mossy rocky mountain top. Not rare.
LA-VN 2155 5 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.
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