Key to the Thottea species in the Philippines
1. Stem puberolous; leaves glabrous on both sides; stamens arranged in 2
whorls; style column 5–7 mm long, lobes
4–6……………………………………….…….T.
philippinensis Quisumb.
– Stem tomentose; leaves glabrous above, densely pubescent beneath;
stamens arranged in 1 whorl; style column 2 mm long, lobes 3 (or
4)………………..T. tomentosa(Blume) Ding Hou