Schisandra subg. Sphaerostema

Cuong, N. T., Hai, D. V., Hung, N. Q. & Dat, M. H., 2019, Schisandra cauliflora (Schisandraceae), a new species from Vietnam, Blumea 64 (2), pp. 183-185 : 185

Key to the species of Schisandra subg. Sphaerostema

1. Anthers on free connectives arising from cavities on the surface of androecium........................... 2

1. Anthers sessile on the abaxial side of cavities or on opposing side of cavities on the surface of androecium......... 3

2. Leaf blades 16–22 by 8–12 cm, petioles 6–8 cm; peduncles 3–6 cm long; apocarps 1.5–2 cm wide; seeds 8–12 mm long by 10–15 mm wide. — Northern Vietnam.... S. cauliflora

2. Leaf blades 7–11.5 by 2–4 cm, petioles 0.8–1.6 cm; peduncles 0.2–1.7 cm long; apocarps 4–8.5 mm wide; seeds 3.7–4.5 mm long, 4.2–4.9 mm wide. — India, Nepal, Bangladesh, China, Myanmar, Thailand, Indonesia, Vietnam....................................... S. propinqua

3. Anthers on the abaxial side of cavities on the surface of androecium. — China: Yunnan .............. S. macrocarpa

3. Anthers on opposing side of cavities on the surface of androecium........................................ 4

4. Leaf blade margins serrate or serrulate; stamens 9–13; fruiting peduncles 0.7–1 cm long, apocarps 0.7–0.9 cm wide; seeds 3–4 mm long. — Southwest China............................................. S. parapropinqua

4. Leaf blade margins entire; stamens 5–9; fruiting peduncles 1–1.5 cm long, apocarps 0.8–1.2 cm wide; seeds 5–6 mm long. — China, India, Myanmar, Vietnam...... S. plena