Clermontia drepanomorpha is a a tree species growing 2 to 7 meters tall, both terrestrially and epiphytically. It is native to montane bogs, rain forests, and cloud forests within an elevation range of 915 to 1460 meters. They have repeatedly branched, spreading stems with a light gray or brown appearance and exhibit a characteristic arrangement of helically arranged leaf scars near their apex. The leaves are simple and alternate, with oblanceolate or elliptic blades measuring 8–22 cm long and 1.5–4.5 cm wide. The flowers are in axillary, subumbellately racemose inflorescences, usually containing 2 to 4 glabrous flowers. The peduncle, ranging from 5 to 12 cm in length, is deflexed and features bracts in its upper half or at the apex, while the pedicels are 2 to 3.5 cm long, abruptly ascending, and bear bracteoles in the middle. These flowers are bisexual, epigynous, zygomorphic (bilaterally symmetric), resupinate, and protandrous, with a hypanthium that is 1.5 to 2 cm long and wide, taking on a hemispheric or obconic shape. The calyx is fused (synsepalous) with the tube adnate to the ovary, forming a smooth structure or may have ten longitudinal furrows, occasionally with ridges. The calyx lobes are five in number, green, firm, and valvate, mimicking the corolla in appearance and texture, and can be distinct or partially fused. The perianth is dark purple, bilabiate, and ranges from 4 to 5.5 cm in length. Its lobes are 2.8–4.2 cm long and spread outward. The five stamens form a syngenesious group, with the anthers being dark purple and opening introrsely. The ovary is inferior, consisting of two carpels and two locules, with axile placentation. The style is slender, surrounded by stiff white hairs at the apex, and leads to a 2-lobed stigma, which becomes receptive after pollen is pushed out. The fruits of this species are orange, subglobose berries containing numerous tiny, dark brown or black seeds. These seeds have a minutely foveate-reticulate surface and encase a straight, short to spatulate dicotyledonous embryo in oily endosperm. It is found in montane bogs, rain forests and cloud forests, at elevations around 915-1460 m.