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FOC | Family List | FOC Vol. 11 | Buxaceae | Buxus

17. Buxus sinica (Rehder & E. H. Wilson) M. Cheng, Fl. Reipubl. Popularis Sin. 45(1): 37. 1980.

黄杨 huang yang

Shrubs or small trees; branchlets terete, longitudinally ribbed, grayish white; young branches tetragonous, pubescent; internode (3-)5-20 mm. Petiole 1-2 mm; leaf blade varied in shape and size, broadly elliptic, broadly obovate, orbicular, obovate, obovate-oblong, or elliptic-lanceolate to lanceolate, (5-)7-35 × (3.5-)5-20 mm, leathery, thickly leathery, or thinly leathery, shining adaxially, glabrous on both surfaces or puberulent along basal half of midrib, base rounded to cuneate, apex rounded, obtuse with retuse tip or acuminate with acute tip; midrib elevated adaxially, lateral veins obscure and rugulose adaxially. Inflorescences axillary, capitate; rachis 3-4 mm, pubescent; bracts broadly ovate, 2-2.5 mm, ± pubescent abaxially. Male flowers ca. 10, sessile; outer tepals ovate-elliptic; inner tepals suborbicular, 2.5-3 mm, glabrous; stamens ca. 4 mm; sterile pistil with clavate gynophore, apex slightly inflated, ca. 2 mm, sterile pistil and tepals length ca. 2:3 or equal to 3:2. Female flowers: tepals ca. 3 mm; ovary slightly longer than style, glabrous; style thick and compressed; stigma obcordate, decurrent to middle part of style. Capsule subglobose, 6-8(-10) mm; persistent style 2-3 mm.

● Forests in mountain valleys and on slopes, thickets, streamsides, stony areas; 600-2600 m. Anhui, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Taiwan, Zhejiang.

1 Leaf blade elliptic-lanceolate or lanceolate, 2-3.5 × 1-1.3 cm, apex acuminate, with acute tip, midrib elevated on both surfaces, lateral veins visible adaxially; style ca. 3 mm.   17b var. aemulans
+ Leaf blade broadly elliptic, broadly obovate, orbicular, obovate-elliptic, or obovate-oblong, apex rounded or obtuse, with retuse tip, midrib elevated adaxially; style 6-8(-10) mm   (2)
2 (1) Leaf blade larger, 1.5-3.5 × 0.8-2 cm, puberulent along basal part of midrib adaxially, densely white papillate along midrib abaxially, lateral veins prominent adaxially   (3)
+ Leaf blade smaller, glabrous and not papillate along midrib adaxially, lateral veins prominent or obscure adaxially   (4)
3 (2) Sterile pistil and tepals length 2:3.   17a var. sinica
+ Sterile pistil and tepals length 3:2 or equal.   17c var. intermedia
4 (2) Leaf blade thinly leathery, lateral veins prominent adaxially; capsule glabrous.   17d var. parvifolia
+ Leaf blade thickly leathery, lateral veins obscure adaxially and rugulose; capsule pubescent or glabrous   (5)
5 (4) Leaf blade 9-11(-12) × 8-10 mm; capsule pubescent initially.   17e var. vacciniifolia
+ Leaf blade very small, 5-7(-9) × 3.5(-6) mm; capsule glabrous.   17f var. pumila

Lower Taxa


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