窄叶天料木查看源代码讨论查看历史
| 窄叶天料木 |
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中文名:窄叶天料木 拉丁学名:Homalium sabiifolium 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:侧膜胎座目 亚 目:山茶亚目 科:大风子科 族:天料木族 属:天料木属 |
窄叶天料木，学名 Homalium sabiifolium ，是大风子科、天料木属植物，Shrubs, 2-3 m tall; bark gray-brown, not flaking; branchlets terete, pubescent when young, glabrescent, hairs whitish, semiappressed. Stipules linear, nearly filiform, 1.5-2 mm, hairy, early caducous; petiole short, ca. 2 mm, pubescent, swollen; 产于广西壮族自治区。 [1]
形态特征
乔木，树皮淡灰色或褐灰色，不裂，幼枝有毛，老枝圆柱形，无毛，有槽纹和皮孔。叶薄革质，狭长圆形或长圆状披针形，长4-8厘米，宽1.5-2.5厘米；
先端渐尖，稀钝，基部宽楔形或楔形，边缘有锯齿并稍向下卷，两面无毛，有时下面脉腋有束毛，干后上面棕褐色，下面棕色，侧脉4-6对，网脉稍明显；
叶柄短，长2-3毫米，幼时有毛，逐渐脱落近无毛或无毛。花多数，单个或成簇排成短而分枝少的圆锥状，圆锥花序顶生或生于上部的叶腋，长4-8（12)厘米，被短柔毛；
花梗长1.5-2毫米，被疏柔毛，近中部具关节；苞片线形；花直径约5毫米，结果时达8毫米；萼筒陀螺状，长1.5-2毫米，外面被柔毛，有纵槽纹；
萼片线形，偶匙状线形，长约3毫米，先端短尖或钝，有密长睫毛；花瓣窄椭圆形或线状倒披针形，长约4毫米，先端稍钝，边缘被密长睫毛，比萼片稍长并稍宽；
雄蕊8-9（-10），花丝被毛；子房略被毛，花柱3-4，纤细，长约2.5毫米，短于雄蕊，中部以上分歧，下部疏被毛；侧膜胎座3-4，每个有胚珠2-4。
蒴果革质，倒圆锥状，长约3.5毫米；种子少数。花期秋季，果期冬季。 Homalium sabiifolium How & Ko, Acta Bot. Sin. 8(1): 43. 1959. 窄叶天料木 zhai ye tian liao mu
Shrubs, 2-3 m tall; bark gray-brown, not flaking; branchlets terete, pubescent when young, glabrescent, hairs whitish, semiappressed. Stipules linear, nearly filiform, 1.5-2 mm, hairy, early caducous; petiole short, ca. 2 mm, pubescent, swollen; leaf blade narrowly elliptic, rarely narrowly elliptic-oblong, ca. 3 × as long as wide, 8-10 × 2-3 cm, leathery, both surfaces usually glabrous, adaxially sometimes hairy along midvein and in vein axils, midvein raised abaxially, flat adaxially, lateral veins 6-8 pairs, base acute, margin shallowly obtusely serrate, apex acute or tapering to an acuminate tip 1-1.5 cm.
Inflorescence terminal or axillary, racemose, 4-6 cm; upper bracts linear to lanceolate, 1.5-2 mm, papery, pubescent, hairs semiappressed. Pedicels 2-3 mm, articulate at middle, pubescent, hairs semiappressed.
Flowers numerous, inserted along rachis singly or in pairs, (8-)10-merous, 6-8 mm in diam. Calyx tube 2-3 mm, longitudinally ribbed, pubescent, hairs whitish, appressed, short, ca. 0.2 mm; sepals 2-3 × ca. 0.5 mm, linear or linear-lanceolate, both sides sparsely pubescent, hairs appressed, margin ciliate, hairs spreading or semispreading, mostly longer than those on calyx tube; sepal apex mucronate.
Petals subequal to sepals in size, or longer (to ca. 4 mm) and broader as fruit develops, outside sparsely appressed hairy, inside with hairs denser, longer, more closely appressed, margin ciliate, hairs spreading, white, straight, to ca. 0.5 mm. Disk glands ca. 0.5 mm in diam. Stamens 3-5 mm, overtopping perianth, sparsely pubescent except in upper 1/3, hairs spreading.
Free part of ovary sparsely pubescent throughout, hairs spreading, white, long; styles 4, ca. 4 mm, joined in basal 1/4 to form a short column, hairy except in distal 1/3, hairs spreading, white, long; placentas 3, each with 3 or 4 ovules. Fl. Oct-Feb of following year, fr. Mar-Nov.
产地生境
● Sparse forests of mountain valleys; ca. 500 m. Guangxi.