白背鹅掌柴 bai bei e zhang chai

Heptapleurum hypoleucum Kurz, Forest Fl. Burma 1: 539. 1877.

Trees, to 10 m tall, andromonoecious. Petiole 30-50 cm; petiolules (1-)2-10 cm; leaflets usually 7, often also with 1 much smaller leaflet, ovate to elliptic or oblong, 10-23 × 4-12 cm, papery to leathery, abaxially sparsely stellate tomentose (occasionally glabrous), adaxially glaucous and glabrous, secondary veins 8-12 pairs, conspicuous adaxially, base cuneate to rounded, margin entire, rarely serrate or lobed, apex acute. Inflorescence a terminal panicle of umbels, stellate pubescent or glabrous; primary axis 15-30(-40) cm; secondary axes to 23 cm, with a terminal umbel of bisexual flowers and usually 1-4 umbels of male flowers; pedicels 8-14 mm. Calyx sparsely stellate pubescent. Ovary 5-carpellate; styles united into a column; stigmas minutely capitate. Fruit subglobose to ovoid, 3-5 mm in diam.; styles persistent, ca. 3 mm. Fl. Jan-Feb, fr. Apr.

Dense forests; ca. 1300 m. Xizang (Mêdog), S Yunnan [India, Myanmar, Vietnam].