[3] William Grant Craib, the British botanist who first formally described the species, named it after its fascicles of flowers that often occur in three (Latinized form of Greek τρι-, tri-) parts (Latinized form of Greek -μέρος, -meros).

The young, brown branches are densely hairy, but become hairless with maturity.

Its very densely hairy petioles are 4-11 by 1.5-2.5 millimeters with a broad groove on their upper side.

Its Inflorescences occur in groups of 3–6 on branches, and are organized on indistinct peduncles.

The yellow to light green, oval, outer petals are 2-3 by 1.5-3 millimeters with hairless upper and very densely hairy lower surfaces.

[7] It has been observed growing in evergreen and deciduous forests below limestone mountains at elevations of 240–1500 meters.

[6] Extracts of bioactive molecules from its tissues have been reported to contain aporphine derivatives with cytoxic activity in tests with culture human cancer cells.