Description from Flora of China
Conocephalus naucleiflorus Roxburgh ex Lindley, Bot. Reg. 14: t. 1203 A & B. 1829; Urtica naucleiflora Roxburgh.
Branchlets gray-brown when dry; stipular and petiolar scars very prominent, pubescent, soon glabrous. Stipules caducous, straight, 1-2 cm; petiole 6-10 cm, glabrous; leaf blade broadly ovate or elliptic, 10-22 × 7-15 cm, lateral veins 10-13 pairs, both surfaces glabrous, base rounded or cordate, apex obtuse or acute. Male inflorescences dichotomously branched 5-6 times, 4-7 × 4-8 cm; bracts ca. 8 mm; glomerules 4-6 mm in diam. Female inflorescences dichotomously branched 5-6 times, 5-7 × 6-8 cm; bracts as males; glomerules 1-1.3 cm in diam., 1.2-1.8 cm in diam. in fruit. Male flowers sessile, obovoid, 1-2 mm; perianth lobes 4, pubescent; stamens 4; filaments straight, short. Female flowers pedicellate, ca. 2 mm; stigma shortly ligulate. Achene oblong-obovoid, ca. 2 mm, verrucose. Fl. Mar-May, fr. May-Jul.
This species is here newly recorded for China. The name was incorrectly recorded as “Conocephalus naucleiformis” in Index Kewensis and this error has been repeated by various authors.
Monsoon forests, near streams; ca. 1600 m. SE Xizang (Mêdog) [NE India, Myanmar, Thailand].