小叶黄杨
分类:植物科普
小叶黄杨 Buxus sinica var. parvifolia M. Cheng
小叶黄杨树型
小叶黄杨叶片
小叶黄杨果期
灌木或小乔木，高1-6米；枝圆柱形，有纵棱，灰白色；小枝四棱形，全面被短柔毛或外方相对两侧面无毛，节间长0.5-2厘米。叶革质，阔椭圆形、阔倒卵形、卵状椭圆形或长圆形，大多数长1.5-3.5厘米，宽0.8-2厘米，先端圆或钝，常有小凹口，不尖锐，基部圆或急尖或楔形，叶面光亮，中脉凸出，下半段常有微细毛，侧脉明显，叶背中脉平坦或稍凸出，中脉上常密被白色短线状钟乳体，全无侧脉，叶柄长1-2毫米，上面被毛。花序腋生，头状，花密集，花序轴长3-4毫米，被毛，苞片阔卵形．长2-2.5毫米，背部多少有毛；雄花：约10朵，无花梗，外萼片卵状椭圆形，内萼片近圆形，长2.5-3毫米，无毛，雄蕊连花药长4毫米，不育雌蕊有棒状柄，末端膨大，高2毫米左右（高度约为萼片长度的2/3或和萼片几等长）；雌花：萼片长3毫米，子房较花柱稍长，无毛，花柱粗扁，柱头倒心形，下延达花柱中部。蒴果近球形，长6-8(-10)毫米，宿存花柱长2-3毫米。花期3月，果期5-6月。
产安徽（黄山）、浙江（龙塘山）、江西（庐山）、湖北（神农架及兴山）；生于岩上，海拔1000米。模式标本采自黄山。
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.
Stony areas; ca. 1000 m. S Anhui (Huang Shan), Chongqing, Hubei, Jiangxi (Lushan), Zhejiang (Longtang Shan).
