假升麻 jia sheng ma

Spiraea aruncus Linnaeus, Sp. Pl. 1: 490. 1753; Aruncus asiaticus Pojarkova; A. dioicus (Walter) Fernald var. kamtschaticus (Maximowicz) H. Hara; A. dioicus var. tenuifolius (Nakai ex H. Hara) H. Hara; A. dioicus var. triternatus (Wallich ex Maximowicz) H. Hara; A. dioicus var. vulgaris (Maximowicz) H. Hara; A. kamtschaticus (Maximowicz) Rydberg; A. kamtschaticus var. tomentosus (Koidzumi) Miyabe & Tatewaki; A. sylvester var. kamtschaticus Maximowicz; A. sylvester var. tenuifolius Nakai ex H. Hara; A. sylvester var. tomentosus Koidzumi; A. sylvester var. triternatus Wallich ex Maximowicz; A. sylvester var. vulgaris Maximowicz; A. tomentosus (Koidzumi) Koidzumi; Astilbe aruncus (Linnaeus) Treviranus; Ulmaria aruncus (Linnaeus) Hill.

Plants to 3 m tall, woody at base. Stems dark purplish, glabrous. Leaves 2- or 3-pinnate; petiolules 4–10 mm; leaflets rhombic-ovate, ovate-lanceolate, or long elliptic, 5–13 × 2–8 cm, subglabrous on both surfaces, base cuneate, margin irregularly toothed, apex acuminate to long acuminate. Panicle lax, 10–40 × 7–17 cm; peduncle and pedicels glabrescent in fruit; bracts and bracteoles sparsely pubescent. Flowers 2–4 in diam.; pedicel ca. 2 mm. Hypanthium slightly pubescent. Sepals spreading or erect in fruit. Male flowers with filaments ca. 2 × as long as petals. Fl. Jun, fr. Aug–Sep.

Mixed forests on montane slopes, valleys; 1800--3500 m. Anhui, Gansu, Guangxi, Heilongjiang, Henan, Hunan, Jiangxi, Jilin, Liaoning, Shaanxi, Sichuan, Xizang, Yunnan [Bhutan, NW India (Himachal Pradesh), Japan, Korea, Mongolia, Nepal, Russia, Sikkim; SW Asia, Europe, ?NW North America (Alaska)].