flower of var. subsessilis; slide collection Department of Systematic Botany, Arhus, Denmark
flower of var. subsessilis; photgraph by K. Larsen, Department of Systematic Botany, Arhus, Denmark
flower parts; drawing by H. Lamourdedieu in Flora of Thailand 4 (1) f. 1
ovaries of vars. pottsii, subsessilis and velutina; drawing by H. Lamourdedieu in Flora of Thailand 4 (1) f. 1
S.E.M. picture of a pollen grain of var. subsessilis by S.S. Larsen, Department of Systematic Botany, Arhus, Denmark