PDF《赤壁木属 chi bi mu shu》

Flora of China 8: 403.

2001. 19. DECUMARIA Linnaeus, Sp. Pl., ed. 2, 2: 1663. 1763. 赤壁木属 chi bi mu shu Huang Shumei (黄淑美 Hwang Shu-mei);

Bruce Bartholomew Shrubs evergreen, climbing, with aerial rootlets. Leaves opposite, petiolate, stipulate;

leaf blade margin entire or dentate. Inflorescence terminal, a corymbose panicle. Flowers bisexual, small. Calyx tube adnate to ovary;

lobes 7C 10. Petals 7C10, valvate in bud. Stamens 20C30;

filaments slender;

anthers 2-loculed, dehiscing by longitudinal slits. Ovary inferior;

ovules numerous. Style robust;

stigma flat, discoid. Fruit a capsule, dehiscing along ribs;

carpels free from columella. Seeds numerous, membranous winged at both ends. Two species: one in China, one in E North America. 1. Decumaria sinensis Oliver, Hooker's Icon. Pl. 18. t. 1741. 1888. 赤壁木 chi bi mu Shrubs 2C5 m tall. Branchlets gray-brown, terete, pub- escent when young;

nodes slightly swollen. Petiole 1C2 cm;

leaf blade obovate to elliptic, 3.5C7 * 2C3.5 cm, leathery, glabrous or sparsely villous when young, secondary veins 4C6 on both sides of midvein, base cuneate, margin entire, sparsely serrate, or undulate distally from middle, apex obtuse to acute. In- florescences 3C4 * 4C5 cm;

peduncle 1C3 cm;

pedicels 5C10 mm or longer in fruit, sparsely villous. Calyx tube turbinate, ca.

2 mm, glabrous;

lobes ovate to ovate- deltoid, ca.

1 mm. Petals white, oblong-elliptic, 3C4 mm. Filaments 3C4 mm;

anthers ovoid to subovoid. Ovary 5C10-loculed. Style less than

1 mm;

stigma 7C 10-lobed. Capsule brown, campanulate to turbinate, ca.

6 *

5 mm, 10C12-angled, apex truncate, with persistent style and stigma. Seeds ca.

3 mm;

wings white. Fl. MarCMay, fr. AugCOct. ? Thickets on mountain slopes, rock crevices;

600C1300 m. Gansu, Guizhou, Hubei, Shaanxi, Sichuan. Flora of China 8: 403. 2001.