苍背木莲 cang bei mu lian

Trees, to 8 m tall. Twigs yellowish brown, glabrous; vegetative buds glabrous. Stipular scar 1/3-1/2 as long as petiole. Petiole 1.5-2 cm; leaf blade narrowly obovate to narrowly elliptic, 9-18 × 2-3.5 cm, both surfaces glabrous, abaxially glaucous, adaxially deep green, midvein adaxially impressed, secondary and reticulate veins inconspicuous, secondary veins 10-15 on each side of midvein, base cuneate, apex acuminate. Peduncle ca. 4 cm. Tepals 9, white; tepals of outer whorls 3, oblong-obovate, 4-5 cm; tepals of inner whorls 6, obovate to obovate-spoon-shaped, fleshy. Stamens numerous, 1-1.5 cm; connective thick, exserted, apically tapered triangular; anthers 8-10 mm. Gynoecium ellipsoid, 1.6-2 cm; carpels numerous; ovules 10 per carpel. Fruiting peduncle 4-6 cm. Fruit ovoid, 4.5-5 cm, pendulous; mature carpels ellipsoid, 1.5-2 cm, abaxially papillate, apex shortly beaked. Seeds heart-shaped, ca. 7 × 5 mm. Fl. May-Jun, fr. Aug.

● Forests; 1500-1600 m. Guizhou.