白楸Mallotus paniculatus

中文名(Chinese Name):白楸
学名(Scientific Name):Mallotus paniculatus (Lam.) Muell. Arg.
英文名(English Common Name):
别名(Chinese Common Name):力树、黄背桐
异名(Synonym):Echinus trisulcus Lour.  Mallotus cochinchinensis Lour.  Mallotus paniculatus var. formosanus (Hayata) Hurus.  Mallotus formosanus Hayata  Mallotus albus (Roxb. ex Jack) Müll. Arg.  Rottlera paniculata A. Juss.  Rottlera alba Roxb.
科属(Family & Genus):大戟科(Euphorbiaceae)野桐属
形态特征(Description):乔木或灌木,高3-15米;树皮灰褐色,近平滑;小枝被褐色星状绒毛。叶互生,生于花序下部的叶常密生,卵形、卵状三角形或菱形,长5-15厘米,宽3-10厘米顶端长渐尖,基部楔形或阔楔形,边缘波状或近全缘,上部有时具2裂片或粗齿;嫩叶两面均被灰黄色或灰白色星状绒毛,成长叶上面无毛;基出脉5条,基部近叶柄处具斑状腺体2个,叶柄稍盾状着生,长2-15厘米。花雌雄异株,总状花序或圆锥花序,分枝广展,顶生,雄花序长10-20厘米;苞片卵状披针形,长约2毫米,渐尖,苞腋有雄花2-6朵,雄花:花梗长约2毫米;花蕾卵形或球形;花萼裂片4-5,卵形,长2-2.5毫米,外面密被星状毛;雄蕊50-60枚。雌花序长5-25厘米;苞片卵形,长不及1毫米,苞腋有雌花1-2朵;雌花:花梗长约2毫米;花萼裂片4-5,长卵形,长2-3毫米,常不等大,外面密生星状毛;花柱3,基部稍合生,柱头长2-3毫米,密生羽毛状突起。蒴果扁球形,具3个分果爿,直径1-1.5厘米,被褐色星状绒毛和疏生钻形软刺,长4-5毫米,具毛;种子近球形,深褐色,常具皱纹。花期7-10月,果期11-12月。
分布(Distribution):产云南、贵州、广西、广东、海南、福建和台湾。生于海拔50-1300米林缘或灌丛中。亚洲东南部各国也有。
用途(Use):木材质地轻软;种子油可作工业用油。
引自中国植物志英文版FOC Vol. 11 Page 227, 236
Mallotus paniculatus (Lamarck) Müller Argoviensis, Linnaea. 34: 189. 1865.
白楸 bai qiu | Euphorbiaceae  | Mallotus
Croton paniculatus Lamarck, Encycl. 2: 207. 1786; Echinus trisulcus Loureiro; Mallotus chinensis Müller Argoviensis; M. cochinchinensis Loureiro; M. formosanus Hayata; M. paniculatus var. formosanus (Hayata) Hurusawa; Rottlera paniculata (Lamarck) A. Jussieu.
Shrubs or trees, 3-15 m tall. Branchlets reddish stellate-tomentulose. Stipules small; petiole 2-15 cm; leaf blade rhombic, ovate, or triangular-ovate, often 1-3-lobed or 3-cuspidate, 5-15 × 3-12 cm, thickly papery, adaxially glabrescent, abaxially grayish tomentulose, base cuneate, sometimes slightly peltate, with 2 large basal glands, apex acuminate; basal veins 3-5. Male and female inflorescences often branched, 10-25 cm, tomentulose; bracts ovate, 1-2 mm. Male flowers 2-7-fascicled; pedicel 2-3 mm; calyx lobes 3 or 4, ovate, 2-2.5 mm, stellate-puberulent; stamens 50-60. Female flowers: sepals 4 or 5, oblong, 2-3 mm, tomentulose; ovary tomentulose; styles 3, ca. 3 mm, plumose. Fruiting pedicel ca. 2.5 mm; capsule 3-locular, ca. 10 mm in diam., tomentulose, sparsely softly spiny, spines subulate, 4-5 mm. Seeds subglobose, ca. 4 mm in diam., blackish, verruculose or smooth. Fl. Jul-Oct, fr. Oct-Dec.
Mountain slopes, thickets, secondary forests; below 100-1300 m. S Fujian, Guangdong, Guangxi, Guizhou, Hainan, Taiwan, Yunnan [Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam; NE Australia].

白楸Mallotus paniculatus

白楸Mallotus paniculatus
 

(责任编辑:徐晔春)

顶一下[0]

踩一下[0]