FLORA OF LAOS Fam. Begoniaceae Begonia viscosa Aver., sp.nov. Type Vientiane Prov., Vang Vieng Distr., vicinity of Vang Vieng town, around point 18°54’58”N 102°24’52”E. Secondary broadleaved evergreen dry forest on very steep rocky slopes and on the top of remnant mountain composed with highly eroded crystalline marble-like limestone at elevation 400-450 m a.s.l. Lithophytic undershrub with erect shoots to 2 m tall in crevices of open vertical cliffs. Flowers white, sometimes with light punk tint, anthers and stigmas yellow. Leaves above light green to dull gray or gray-brownish with palmate whitish marks, uniform dull purple below, petioles green to purple. Locally common. CPC 2438 24 April 2011 Photos. Coll.: L.Averyanov, P.V.The. d-EXSICCATES OF VIETNAMESE FLORA 0187/CPC 2438 (CPC, LE) © Nguyen Tien Hiep, L.Averyanov, Phan Ke Loc