Stemona in Flora of China @ efloras.org

1. Stemona Loureiro, Fl. Cochinch. 2: 401, 404. 1790.

百部属 bai bu shu

Subshrubs or vines, perennial. Roots tufted, tuberous, fusiform, fleshy. Stems erect or climbing. Leaves whorled, opposite, or alternate, shining. Inflorescences axillary, sometimes borne on petiole or leaf midvein. Perianth segments subequal, lanceolate, many veined. Stamens erect, inserted at base of perianth segments; filaments free or basally ± connate; anthers basifixed, apex often adaxially appendaged; connective extended into a perianthlike, linear-lanceolate, long appendage. Ovary superior; ovules basally attached to placenta. Capsule ovoid to oblong. Seeds erect, oblong, longitudinally ribbed; funicle bearded.

About 27 species: Asia, Australia; seven species (five endemic) in China.

1 Plants shortly hairy 7 Stemona kerrii

+ Plants glabrous or tubers with patches of hair. (2)

2 (1) Subshrubs; stems simple 1 Stemona sessilifolia

+ Vines; stems sometimes branched. (3)

3 (2) Leaves alternate 5 Stemona parviflora

+ Leaves opposite or whorled, rarely alternate. (4)

4 (3) Leaf blade obovate 3 Stemona shandongensis

+ Leaf blade ovate to linear. (5)

5 (4) Leaves sessile or subsessile, leaf blade narrowly lanceolate to linear, 0.2--1.2(--3) cm wide 6 Stemona mairei

+ Leaves long petiolate, leaf blade ovate to ovate-lanceolate, 1.5--4 cm wide. (6)

6 (5) Peduncle or pedicel borne on leaf midvein 2 Stemona japonica

+ Peduncle or pedicel axillary or borne on base of petiole 4 Stemona tuberosa

Lower Taxa

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