大叶黄杨Buxus megistophylla
中文名(Chinese Name):大叶黄杨
学名(Scientific Name):Buxus megistophylla Lévl.
英文名(English Common Name):
别名(Chinese Common Name):长叶黄杨
异名(Synonym):
科属(Family & Genus):黄杨科(Buxaceae)黄杨属
形态特征(Description):灌木或小乔木,高0.6-2米,胸径5厘米;小枝四棱形(或在末梢的小枝亚圆柱形,具钝棱和纵沟),光滑、无毛。叶革质或薄革质,卵形、椭圆状或长圆状披针形以至披针形,长4-8厘米,宽1.5-3厘米(稀披针形,长达9厘米,或菱状卵形,宽达4厘米),先端渐尖,顶钝或锐,基部楔形或急尖,边缘下曲,叶面光亮,中脉在两面均凸出,侧脉多条,与中脉成40-50度角,通常两面均明显,仅叶面中脉基部及叶柄被微细毛,其余均无毛;叶柄长2-3毫米。花序腋生,花序轴长5-7毫米,有短柔毛或近无毛;苞片阔卵形,先端急尖,背面基部被毛,边缘狭干膜质;雄花:8-10朵,花梗长约0.8毫米,外萼片阔卵形,长约2毫米,内萼片圆形,长2-2.5毫米,背面均无毛,雄蕊连花药长约6毫米,不育雌蕊高约1毫米,雌花:萼片卵状椭圆形,长约3毫米,无毛;子房长2-2.5毫米,花柱直立,长约2.5毫米,先端微弯曲,柱头倒心形,下延达花柱的1/3处。蒴果近球形,长6-7毫米,宿存花柱长约5毫米,斜向挺出。花期3-4月,果期6-7月。
分布(Distribution):产贵州、广西、广东、湖南、江西等地,生于海拔500-1400米的山地、山谷、河岸或山坡林下。
用途(Use):
引自中国植物志英文版FOC Vol. 11 Page 322, 324
Buxus megistophylla H. Léveillé, Fl. Kouy-Tchéou. 160. 1914.
大叶黄杨 da ye huang yang | Buxaceae | Buxus
Shrubs or small trees, 0.6-2 m tall; young branches tetragonous or subterete, ribbed and grooved, glabrous. Petiole 2-3 mm, puberulent; leaf blade ovate, elliptic, or oblong-lanceolate, 4-8 × 1.5-3 cm, rarely lanceolate, up to 9 cm, or rhomboid-ovate, up to 4 cm wide, leathery or thinly leathery, shining above, puberulent along midrib, base cuneate, margin revolute, apex acuminate, obtuse, or with apiculate tip; midrib elevated on both surfaces, lateral veins many, visible on both surfaces. Inflorescences axillary; rachis 5-7 mm, pubescent or glabrescent; bracts broadly ovate, acute, margins scarious, abaxially puberulent near base. Male flowers 8-10; pedicels ca. 0.8 mm; outer tepals broadly ovate, ca. 2 mm; inner tepals orbicular, 2-2.5 mm, glabrous; stamens ca. 6 mm; sterile pistil ca. 1 mm. Female flowers: tepals ovate-elliptic, ca. 3 mm, glabrous; ovary 2-2.5 mm; style ca. 2.5 mm, erect, slightly recurved at apex; stigma obcordate, decurrent to 1/3 of style. Capsule subglobose, 6-7 mm; persistent style ca. 5 mm. Fl. Mar-Apr, fr. Jun-Jul.
- Forests on mountain slopes, valleys, riverbanks; 500-1400 m. NW Guangdong (Lianxian), NE Guangxi, SW Guizhou, S Hunan (Yizhang), S Jiangxi (Anyuan, Huichang).
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