Справочные данные LE - Этикетки Аверьянова Л. В.

FLORA OF LAOS
Orchidaceae
Callostylis rigida Blume

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphytic and lithophytic creeping vine to 2 m long on mossy rocky mountain tops. Flowers dull yellowish, lip dark violet. Not common.

LA-VN 2058 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Polypodiaceae s.l.
Asplenium caudatum G. Forst.?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Terrestrial and lithophytic fern on steep rocky mountain slope. Common.

LA-VN 2057 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Capparidaceae
Capparis sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Climbing shrub to 2 m tall on open rocky mountain slope. Flowers white. Occasional.

LA-VN 2056 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Nervilia sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Terrestrial tuberiferous herb. Occasional.

LA-VN 2055 4 April 2017a (photo only)
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Liparis viridiflora (Blume) Lindl.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte and lithophyte on open rocky mossy mountain tops. Common.

LA-VN 2055 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Polypodiaceae s.l.
Platycerium coronarium (J. Kцnig) Desv.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on old mossy trees on open rocky step mountain slope. Common.

LA-VN 2054 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Polypodiaceae s.l.
Davallia sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Creeping epiphyte and lithophyte on mossy open rocky mountain tops. Common.

LA-VN 2053 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Cycadaceae
Cycas chevalieri Leandri?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Lithophytic and terrestrial palm-like plant (stem-less or with short stem to 20 cm tall) on steep rocky cliffs and on alluvial slope among open secondary shrubs Occasional, locally common. Male cone fusiform, to 25 cm long with short pale brown-orange indumentum.

LA-VN 2052 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Convallariaceae
Peliosanthes choriandra Aver., N. Tanaka et K.S. Nguyen Paratype

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Terrestrial herb on steep shady rocky mountain slope. Flowers green. Occasional.

LA-VN 2051 4 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.

FLORA OF LAOS
Acantaceae
Strobilanthes arborescens sp.nov.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Deciduous treelet or shrub 2-4 m tall on open karstic rocks on mountain top. Flowers blue. Very common. Main co-dominant of deciduous scrub on open tops of karstic limestone mountains.

LA-VN 2050 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Vanda denisoniana Benson & Rchb.f.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on tall trees on rocky slope near mountain top. Flowers light yellowish. Locally common.

LA-VN 2049 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Araceae
Amorphophallus sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Ephemeroid tuberiferous herb with leafless inflorescence to 0.5 m tall on rocky slope near mountain top. Spathe white with pink apex. Peduncle olive with whitish spots. Rare.

LA-VN 2048 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Dendrobium fimbriatum Hook.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Clustering epiphyte and lithophyte on mossy rocky mountain top. Very common.

LA-VN 2047 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Luisia morsei?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Clustering epiphyte on mossy trees on rocky mountain top. Common.

LA-VN 2046 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Bulbophyllum sp. (B. ambrosia?)

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Creeping epiphyte on mossy trees on rocky mountain top. Common.

LA-VN 2045 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Oberonia sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on mossy trees on rocky mountain top. Common.

LA-VN 2044 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Paphiopedilum concolor (Lindl. ex Bateman) Pfitzer

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Lithophytic rosulate herb in crevices of mossy cliff. Leaves contrast green / whitish tessellated. Locally common.

LA-VN 2043 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Bulbophyllum orectopetalum Garay, Hamer & Siegerist

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte and lithophyte on mossy rocky mountain tops. Flowers: sepals and petals yellowish with purple nerves. Not rare.

LA-VN 2042 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Pholidota articulata Lindl. ex Hook.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte and lithophyte on mossy rocky mountain tops. Common.

LA-VN 2041 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS

Eria apertiflora Summerh.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte and lithophyte on mossy rocky mountain tops. Common.
LA-VN 2040 4 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 10 Sept. 2018.

FLORA OF LAOS
Orchidaceae
Dendrobium thyrsiflorum Rchb.f.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on tall trees. Common.

LA-VN 2039 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Lorantaceae
Lorantus sp.?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Parasitic undershrub with shoot to 1 m long in canopies of tall trees. Occasional.

LA-VN 2038 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Simaroubaceae
Brucea javanica (L.) Merr.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Treelet 2-4 m tall in open slope. Flower buds reddish. Common.

LA-VN 2037 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Dendrobium aphyllum?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on tall mossy trees and lithophyte on mountain top. Common.

LA-VN 2036 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Asclepiadaceae
Dischydia sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Creeping herbaceous epiphytic and lithophytic vine to 1-2 m long on mountain top. Common.

LA-VN 2035 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Asclepiadaceae
Hoya fungii Merr.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Creeping semi-woody epiphytic and lithophytic vine to 5 m long on mountain top. Flowers pinkish. Common.

LA-VN 2034 4 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.

FLORA OF LAOS
Orchidaceae
Vanda brunnea Rchb.f.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on tall mossy trees on mountain top. Flowers fragrant, tepals brown, lip epichile and column white. Locally very common.

LA-VN 2033 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS

Luisia morsei Rolfe

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on mossy trees on rocky mountain top. Not rare.
LA-VN 2032 4 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 cult. 23 Aug. 2017. Sepals and petals dull green, sometime with purple tint; lip dull green with dark purple marks and dark purple side-lobes to entirely dark purple. Photos. L.Averyanov

FLORA OF LAOS
Melastomataceae
Memecylon edule Roxb.?

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Shrub 1.5-2 m tall on shady rocky slope. Fruits green. Occasional.

LA-VN 2031 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Didymoplexis vietnamica Ormerod

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l.

Achlorophyllous aphyllous terrestrial herb. Flowers whitish. Occasional.

LA-VN 2030a 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Balanophoraceae
Balanophora sp.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Achlorophyllous root parasite in shady slope. Common.

LA-VN 2030 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Dendrobium crepidatum Lindl. & Paxton

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Epiphyte on old mossy trees near mountain top. Flowers pink-purple, lop with yellow spot. Common.

LA-VN 2029 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Coelogyne trinervis Lindl.

Luang Prabang prov., Pon Xay distr., Houay Man village, Phou Pak Sang Mountain, around point 19°59′03.8′'N 102°25′09.0′'E.

Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1150 m a.s.l. Creeping lithophyte and epiphyte on mossy exposed rocks near mountain top. Common.

LA-VN 2028 4 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Polypodiaceae s.l.
Adiantum capillus-veneris L.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Lithophytic fern on waterfall cliffs. Common.

LA-VN 2027 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Euphorbiaceae

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Tree 8-12 m tall on open rocky stream slope. Flowers yellow. Occasional.

LA-VN 2026 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Sterculiaceae
Sterculia sp.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Treelet 3-5 m tall on shady rocky stream slope. Flowers dirty pinkish. Common.

LA-VN 2025 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Arecaceae
Caryota sp.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Palm 3-4 m tall on shady rocky stream slope. Flowers yellowish to light pinkish. Common.

LA-VN 2024 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Menispermaceae

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Woody vine on open rocky stream slope. Flowers yellow. Common.

LA-VN 2023 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Moraceae
Ficus sp.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Shrub 1-1.5 m tall on open wet stream rocks. Syconia green. Very common.

LA-VN 2022 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Araliaceae
Trevesia palmata (Roxb. ex Lindl.) Vis.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Treelet 3-5 m tall on shady rocky stream slope. Not rare.

LA-VN 2021 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Orchidaceae
Calanthe triplicata (Willemet) Ames?

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial rosulate herb on shady rocky stream slope. Not common.

LA-VN 2020 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Acanthaceae
Asystasia sp. s.l.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial herb 1-1.5 m tall on shady rocky stream slope. Floral bracts white-green tessellated. Occasional.

LA-VN 2019 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Euphorbiaceae

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Woody vine 5-6 m long on shady rocky stream slope. Flowers white. Common.

LA-VN 2018 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Araceae
Steudnera discolor W. Bull

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial herb on shady rocky stream slope. Spathe purple-brown. Very common along stream.

LA-VN 2017 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Convallariaceae
Tupistra muricata (Gagnep.) N.Tanaka

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial rosulate herb on shady rocky stream slope. Fruits globular, dirty violet. Occasional.

LA-VN 2016 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Asclepiadaceae
Hoya verticillata (Vahl) G. Don
Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Creeping epiphytic and lithophytic vine 3-4 m long in open place. Flowers light pinkish. Very common.

LA-VN 2015 2 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.

FLORA OF LAOS
Taccaceae
Tacca chantrieri Andre

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial rosulate herb on shady rocky stream slope. Inflorescence bract and flowers dark brown. Not rare.

LA-VN 2014 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Convallariaceae
Peliosanthes rubra sp nov.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial herb on shady rocky stream slope. Young fruits green, rachis fleshy, dirty violet. Occasional.

LA-VN 2013a 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

Herbarium specimen and photos prepared in 26.10.2020, tepals light olive-green, corona brownish-red, L. Averyanov & T. Maisak, LA-VN 2013a.1

FLORA OF LAOS
Convallariaceae
Peliosanthes irinae Aver. & N.Tanaka

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial herb on shady rocky stream slope. Young fruits green, rachis fleshy, dirty violet. Occasional.

LA-VN 2013 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.

FLORA OF LAOS
Selaginellaceae
Selaginella sp.

Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31′36.9′'N 102°35′15.8′'E.

Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream.

Terrestrial herb to 0.4-0.5 m tall on shady rocky stream slope. Common.

LA-VN 2012 2 April 2017
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Vichith Lamxay, Koudkeo Phommachanh, Phizar Sayalath, Keooudone Souvannakhoummane.