红河鹅掌柴 hong he e zhang chai

Heptapleurum hoi Dunn, J. Linn. Soc., Bot. 35: 498. 1903; Agalma dumicola (W. W. Smith) Hutchinson; A. hoi (Dunn) Hutchinson; Schefflera dumicola W. W. Smith; S. dumicola f. acuta (C. J. Tseng & G. Hoo) Frodin; S. hoi f. acuta C. J. Tseng & G. Hoo; S. hoi var. macrophylla H. L. Li; S. salweenensis W. W. Smith; S. salweenensis var. macrophylla (H. L. Li) Frodin; S. stenomera Handel-Mazzetti.

Trees, to 12 m tall, andromonoecious. Petiole (6-)10-50(-60) cm; petiolules 1-5 cm; leaflets (3-)5-9, narrowly obovate to oblong, 5-22(-30) × 1.5-5(-10) cm, papery to subleathery, both surfaces glabrous, secondary veins 8-22 pairs, conspicuous on both surfaces, base rounded to acute, margin entire, apex acuminate, rarely acute. Inflorescence a terminal panicle of racemes, ferruginous or sparsely stellate pubescent, sometimes glabrescent; primary axis 15-50 cm; secondary axes 15(-25) cm, ferruginous; pedicels 2-4(-6) mm. Calyx rim 1.5-2.5 mm, sometimes scarious, sparsely stellate to glabrous, inconspicuously 5-toothed. Ovary 5-carpellate; styles united into a column. Fruit globose, 4-5 mm in diam., slightly 5-ribbed when dry; styles persistent, ca. 1.5 mm. Fl. Aug-Sep, fr. Aug-Nov.

Dense forests in valleys; 1400-3300 m. SW Sichuan, SE Xizang, Yunnan [Vietnam].