What type of vegetation does Citharexylum and Cuminum have in common?
Cuminum Cuminum is a genus of four flowering plants in the family Apiaceae. The most significant is "Cuminum cyminum", source for the cumin seeds that are a popular spice.
Trichopus zeylanicus Trichopus zeylanicus is a small herbaceous plant, which is one of only two species of its genus, "Trichopus". Formerly it was placed in its own family, Trichopodaceae, but is now included in the Dioscoreaceae family. The leaves are about 20 cm long and grow from a rhizome. The shape of the leaves can be highly variable even within one location, but the most common shape is cordate. The herb grows on sandy soil near rivers and streams in shady places in lowland and intermediate altitude forests. It flowers year long and the fruits are thought to be dispersed by water. The unusual flowers are purplish black.