Begonia pseudodryadis C. Y. Wu, Acta Phytotax. Sin. 33: 276. 1995 aff. Differs in: Broadly triangular-ovate, carinate apiculate stipules Pure velvety light green leaves above, pure whitish below Triangular sepals (2 outher segments) of staminate flower Ovate petals (3 inner segments) of pistillate flower Broadly lunate adaxial keel and low narrowly lunate lateral keels Son La Prov., Yen Chau Distr., Muong Lum Municipality, Na Hat village around point 21°00′35”N 104°29′06”E.
Primary coniferous forest with Pinus kwangtungensis and Calocedrus rupestris on very steep rocky slopes of remnant mountain composed with highly eroded solid limestone at elevation 1000-1150 m a.s.l.
Lithophytic herb on vertical shady cliff. Occasional.
CPC 1876a 1 April 2011 Coll.: L.Averyanov, N.T.Hiep, T.B.Ngan.
Flowered under cultivation in April-May 2012. Flowers light pink. Almost odorless. Coll.: L.Averyanov, 23 April 2012. CPC 1876aa. Photos.