软弱杜茎山Maesa tenera Mez
软弱杜茎山Maesa tenera Mez
13. 软弱杜茎山（中国高等植物图鉴）
Maesa tenera Mez in Engl, , Pflanzenreich 9 (IV. 236): 28. 1902; Walker in Philipp. Journ. Sci. 73: 34. 1940, p. p. min.; 中国高等植物图鉴, 3: 214. 图4382. 1974.
灌木，高1-2米；小枝圆柱形，无毛。叶片膜质或纸质，广椭圆形至菱状椭圆形，顶端通常突然渐尖或短渐尖，基部楔形或广楔形，长7.5-11厘米，宽3.5-5.5厘米，边缘除近基部外，其余具钝锯齿，两面无毛，叶面脉平整，背面脉明显，隆起，侧脉约7对，具不甚明显的脉状腺条纹；叶柄长1-1.5厘米，无毛。总状花序至圆锥花序，腋生，长3-6 (-11) 厘米，无毛，疏松；苞片披针形至钻形；花梗长约2毫米，无毛；小苞片卵形至披针形，紧贴花萼基部，具缘毛；花长约2毫米，萼片广卵形，顶端急尖或钝，无毛，有时具疏缘毛；花冠白色，钟形，长约2毫米；裂片与花冠管等长，广卵形，顶端圆形，边缘微波状，具脉状腺条纹；雄蕊在雌花中退化，在雄花中着生于花冠管上部，较花冠裂片短；花丝较花药略长；花药长圆形，背部无腺点；雌蕊较花冠短，柱头微4裂，裂片短且圆。果球形或近圆形，直径约3毫米，具纵行肋纹，宿存萼包果的中部略上，即果的2/3处，具宿存花柱。花期约2月，果期8-9月。
产广东（中部及南部沿海，海南岛未发现），生于林缘开旷的地方。模式标本采于澳门。
E. H. Walker 曾将产于我国东部的金珠柳 (M. montana A. DC.) 当作本种，其实本种仅产于广东云浮、肇庆鼎湖山及南部沿海，其余从西南至台湾的绝大多数地区所产者，均应是金珠柳，二者的主要区别见金珠柳讨论。
《Flora of China》 Vol. 15 (1996)
Maesa tenera Mez
软弱杜茎山 ruan ruo du jing shan
Shrubs 1-2(-4) m tall, glandular granulose, early glabrescent. Branchlets angular to obtusely ridged, lenticellate; pith hollow. Petiole canaliculate, 1-1.5 cm; leaf blade broadly elliptic to ovate, 7.5-11 × 3.5-5.5 cm, membranous, dull adaxially, inconspicuously pellucid punctate and sparsely glandular granulose abaxially, base cuneate, margin serrate, teeth not callose, apex caudate-acuminate; lateral veins 7-10 on each side of midrib, marginal vein absent. Inflorescences axillary, racemose or paniculate, 7-10 cm, glabrous; bracteoles ovate to lanceolate, margin ciliate, apex acute. Flowers 1.5-2 mm. Pedicel 1.5-2 mm, glabrous. Calyx lobes broadly ovate, margin entire, sometimes ciliate, apex acute. Corolla campanulate, twice as long as calyx lobes; lobes broadly ovate, as long as tube, orange punctate-lineate, margin crenulate, apex rounded. Stamens of pistillate flowers reduced, those of male flowers inserted on distal part of corolla tube; filaments longer than anthers; anthers oblong. Pistil and pistillode included. Style persistent; stigma 4-lobed. Fruit globose or subovoid, ca. 3 mm in diam., striate, 1/4-1/3 exposed above attachment of persistent calyx lobes. Fl. Feb, fr. Aug-Sep.
* Open edges of mixed forests; 100-600 m. C and S Guangdong
别名：鲫鱼胆;假茶叶;薄叶空心花;台湾山桂花;轻茎杜茎山;软枝杜茎山;
科名：紫金牛科 Myrsinaceae
属名：杜茎山属 Maesa
13. 软弱杜茎山（中国高等植物图鉴）
Maesa tenera Mez in Engl, , Pflanzenreich 9 (IV. 236): 28. 1902; Walker in Philipp. Journ. Sci. 73: 34. 1940, p. p. min.; 中国高等植物图鉴, 3: 214. 图4382. 1974.
灌木，高1-2米；小枝圆柱形，无毛。叶片膜质或纸质，广椭圆形至菱状椭圆形，顶端通常突然渐尖或短渐尖，基部楔形或广楔形，长7.5-11厘米，宽3.5-5.5厘米，边缘除近基部外，其余具钝锯齿，两面无毛，叶面脉平整，背面脉明显，隆起，侧脉约7对，具不甚明显的脉状腺条纹；叶柄长1-1.5厘米，无毛。总状花序至圆锥花序，腋生，长3-6 (-11) 厘米，无毛，疏松；苞片披针形至钻形；花梗长约2毫米，无毛；小苞片卵形至披针形，紧贴花萼基部，具缘毛；花长约2毫米，萼片广卵形，顶端急尖或钝，无毛，有时具疏缘毛；花冠白色，钟形，长约2毫米；裂片与花冠管等长，广卵形，顶端圆形，边缘微波状，具脉状腺条纹；雄蕊在雌花中退化，在雄花中着生于花冠管上部，较花冠裂片短；花丝较花药略长；花药长圆形，背部无腺点；雌蕊较花冠短，柱头微4裂，裂片短且圆。果球形或近圆形，直径约3毫米，具纵行肋纹，宿存萼包果的中部略上，即果的2/3处，具宿存花柱。花期约2月，果期8-9月。
产广东（中部及南部沿海，海南岛未发现），生于林缘开旷的地方。模式标本采于澳门。
E. H. Walker 曾将产于我国东部的金珠柳 (M. montana A. DC.) 当作本种，其实本种仅产于广东云浮、肇庆鼎湖山及南部沿海，其余从西南至台湾的绝大多数地区所产者，均应是金珠柳，二者的主要区别见金珠柳讨论。
《Flora of China》 Vol. 15 (1996)
Maesa tenera Mez
软弱杜茎山 ruan ruo du jing shan
Shrubs 1-2(-4) m tall, glandular granulose, early glabrescent. Branchlets angular to obtusely ridged, lenticellate; pith hollow. Petiole canaliculate, 1-1.5 cm; leaf blade broadly elliptic to ovate, 7.5-11 × 3.5-5.5 cm, membranous, dull adaxially, inconspicuously pellucid punctate and sparsely glandular granulose abaxially, base cuneate, margin serrate, teeth not callose, apex caudate-acuminate; lateral veins 7-10 on each side of midrib, marginal vein absent. Inflorescences axillary, racemose or paniculate, 7-10 cm, glabrous; bracteoles ovate to lanceolate, margin ciliate, apex acute. Flowers 1.5-2 mm. Pedicel 1.5-2 mm, glabrous. Calyx lobes broadly ovate, margin entire, sometimes ciliate, apex acute. Corolla campanulate, twice as long as calyx lobes; lobes broadly ovate, as long as tube, orange punctate-lineate, margin crenulate, apex rounded. Stamens of pistillate flowers reduced, those of male flowers inserted on distal part of corolla tube; filaments longer than anthers; anthers oblong. Pistil and pistillode included. Style persistent; stigma 4-lobed. Fruit globose or subovoid, ca. 3 mm in diam., striate, 1/4-1/3 exposed above attachment of persistent calyx lobes. Fl. Feb, fr. Aug-Sep.
* Open edges of mixed forests; 100-600 m. C and S Guangdong