窄葉天料木檢視原始碼討論檢視歷史
| 窄葉天料木 |
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中文名:窄葉天料木 拉丁學名:Homalium sabiifolium 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:側膜胎座目 亞 目:山茶亞目 科:大風子科 族:天料木族 屬:天料木屬 |
窄葉天料木，學名 Homalium sabiifolium ，是大風子科、天料木屬植物，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; 產於廣西壯族自治區。 [1]
形態特徵
喬木，樹皮淡灰色或褐灰色，不裂，幼枝有毛，老枝圓柱形，無毛，有槽紋和皮孔。葉薄革質，狹長圓形或長圓狀披針形，長4-8厘米，寬1.5-2.5厘米；
先端漸尖，稀鈍，基部寬楔形或楔形，邊緣有鋸齒並稍向下卷，兩面無毛，有時下面脈腋有束毛，干後上面棕褐色，下面棕色，側脈4-6對，網脈稍明顯；
葉柄短，長2-3毫米，幼時有毛，逐漸脫落近無毛或無毛。花多數，單個或成簇排成短而分枝少的圓錐狀，圓錐花序頂生或生於上部的葉腋，長4-8（12)厘米，被短柔毛；
花梗長1.5-2毫米，被疏柔毛，近中部具關節；苞片線形；花直徑約5毫米，結果時達8毫米；萼筒陀螺狀，長1.5-2毫米，外面被柔毛，有縱槽紋；
萼片線形，偶匙狀線形，長約3毫米，先端短尖或鈍，有密長睫毛；花瓣窄橢圓形或線狀倒披針形，長約4毫米，先端稍鈍，邊緣被密長睫毛，比萼片稍長並稍寬；
雄蕊8-9（-10），花絲被毛；子房略被毛，花柱3-4，纖細，長約2.5毫米，短於雄蕊，中部以上分歧，下部疏被毛；側膜胎座3-4，每個有胚珠2-4。
蒴果革質，倒圓錐狀，長約3.5毫米；種子少數。花期秋季，果期冬季。 Homalium sabiifolium How & Ko, Acta Bot. Sin. 8(1): 43. 1959. 窄葉天料木 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.
產地生境
● Sparse forests of mountain valleys; ca. 500 m. Guangxi.