Description from Flora of China
Conocephalus suaveolens Blume, Bijdr. Fl. Ned. Ind. 484. 1825; C. sinensis C. H. Wright; Poikilospermum sinense (C. H. Wright) Merrill.
Branchlets gray-brown when dry; stipular and petiolar scars prominent, pubescent, soon glabrous. Stipules often persistent in upper nodes, strongly crescent-shaped, 2-4 cm; petiole 5-10 cm, glabrous; leaf blade broadly ovate, elliptic, or obovate, 10-35 × 7-23 cm, lateral veins 7-14 pairs, both surfaces glabrous, base broad cuneate, rounded, or cordate, apex obtuse or acute. Male inflorescences dichotomously branched 2-3 times, 3.5-6 × 3-7 cm; bracts boat-shaped, 6-10 mm; glomerules 5-7 mm in diam. Female inflorescences dichotomously branched 1 or 2 times, 4-8 × 5-9 cm; primary peduncle longer than secondary; bracts as males; glomerules 2.5-3.5 cm in diam., 3.5-5 cm in diam. in fruit. Male flowers sessile, obovoid, 1.5-2 mm; perianth lobes 4, apex incurved, pubescent; stamens 4; filaments straight, short. Female flowers: pedicel 3-7 mm; stigma shortly ligulate. Achene oblong-obovoid, 3-5 mm, verrucose. Fl. Apr-May, fr. May-Jun.
Moist places, rain forests, monsoon forests, near streams; 500-600 m. S Yunnan [Borneo, India, Indonesia, Malaysia, Philippines, Thailand, Vietnam].