An almost-unknown species endemic to Sumatra (Indonesia). Known only from the type collection, which was collected in 1932 in northern Sumatra, apparently growing on the edge of primary jungle at around 1,000 a.s.l. It has not been reported in almost a century so potentially extinct.

DESCRIPTION (from: van Ooststroom, 1952; translated from Latin): A climbing vine, the branches of the petioles and inflorescences are densely hairy, with short hairs beneath. Twigs smooth or blunt towards the tip. Leaves petiolate, petioles 2-6 cm long, base smooth, apex more or less flattened; blades ovate or ovate-oblong, apex obtuse or obtuse, subcordate at the base, 8-13 cm long, 4-8 cm wide, glabrous above, hairy below, especially on the nerves; median nerve above flat or slightly impressed, protruding below, lateral nerves on both sides 5-6 below prominent, smaller nerves indistinct. Smooth fruiting peduncles 8-22 cm long, apex corymbose-branched, primary branches 1-3 cm long, pedicels 3-5 mm long. Bracts not seen. Sepals unequal; outer sepals obtuse, c. 10 mm long, glabrous, margin very curly; inner sepals obtuse, c. 8-9 mm long, flat or slightly concave, hairy on the outside in the middle, glabrous on the broad edges. Fruit ellipsoid, 12-14 mm long, purple-red; seed 1, ellipsoid.

Combination published at: Nat. Plants 5(11): 1136-44 (Suppl.: 26) (2019). Basyonym: Blumea 7(1): 172 (1952).

COUNTRIES: ASIA: Indonesia.See records in database

TYPE SPECIMENS:
W.N. Bangham & C.M. Bangham, 840:
Holotype (K000830743)
Isotype (A00054264)
Isotype (NY00319232)
Isotype (SING0052413)

SYNONYMS:
Argyreia crispa Ooststr.