flowering and fruiting branches; photograph by K. Larsen, Department of Systematic Botany, Arhus, Denmark
leaves, flower and pod; photograph by K. Larsen, Department of Systematic Botany, Arhus, Denmark
flower; photograph by K. Larsen, Department of Systematic Botany, Arhus, Denmark
S.E.M. picture of pollen grain by S.S. Larsen, Department of Systematic Botany Arhus, Denmark
leaf, inflorescence, flower bud and flower; drawing by H. Lamourdedieu in Flora of Thailand 4 (1) f. 1
flower of hybrid of B. purpurea x variegata, photograph by A. Vogel, Hortus Botanicus, Leiden
flowers of hybrid of B. purpurea x variegata, photograph by G.P. Lewis, Kew Herbarium
leaves and flower of hybrid of B. purpurea x variegata, photograph by S. Minter, slide collection Herbarium Kew