尼泊爾野桐檢視原始碼討論檢視歷史
尼泊爾野桐 |
中文名:尼泊爾野桐 別 名:日本野桐 拉丁學名:Mallotus nepalensis Muell. Arg. 界:植物界 科:大戟科 屬:野桐屬 種:尼泊爾野桐 中國植物志:44(2):045 |
尼泊爾野桐(ní bó ěr yě tóng),拉丁學名:Mallotus nepalensis Muell. Arg.,異名:Mallotus tenuifolius var. floccosus Mallotus oreophilus var. floccosus ,是大戟科、野桐屬 灌木或喬木植物,高3-8米,被棕黃色星狀毛。生於海拔1700-2700米的常綠闊葉林或雜木林中。分布於西藏和雲南。 [1]
尼泊爾野桐形態特徵
尼泊爾野桐 葉互生,具長3-20厘米之柄;葉片卵圓形、卵形、菱狀卵形至三角狀卵形,長10-22厘米,頂端尾狀漸尖,基部圓形或@G形,邊緣全緣或具波狀粗齒,下面被金紅色油點,基部三出脈。
5-6月開花,花序頂生,直立,雄花序長10-18厘米,雌花序在結果時長達22厘米。蒴果密被棕黃色星狀毛和金紅色腺點以及柔軟皮刺。種子黑色,近於半球形,直徑約4毫米。
《西藏植物志》收載的分布於喜馬拉雅山南坡的本種標本,其嫩枝被黃褐色星狀毛,果序長達22厘米,不分枝;果密被黃褐色星狀毛,軟刺柔軟。
未採到雄花及雌花標本,暫作存疑。
Mallotus japonicus (Linnaeus f.) Müller Argoviensis var. floccosus (Müller Argoviensis) S. M. Hwang; M. oreophilus Müller Argoviensis var. floccosus Müller Argoviensis; M. tenuifolius Pax var. floccosus (Müller Argoviensis) Croizat.
Shrubs or small trees, 3-6 m tall. Branchlets and inflorescences brownish-yellowish stellate-tomentose. Petiole 5-15 cm, tomentulose; leaf blade orbiculate-ovate or triangular-ovate, 10-23 × 8-24 cm, papery, abaxially brownish or gray stellate-pilose, sparsely orange glandular-scaly, adaxially glabrescent, base truncate or slightly cordate, sometimes slightly peltate, with 2 maculate glands, margin entire, sometimes shortly 3-lobed, apex acuminate; basal veins 3. Male inflorescences unbranched, 10-15 cm; bracts lanceolate-subulate, ca. 1 mm.
Male flowers 2- or 3-fascicled; pedicel 1-1.5 mm; sepals 4, oblong, ca. 3 mm, tomentulose; stamens ca. 100. Female inflorescences unbranched, 10-20 cm; peduncle 2-5 cm, ca. 3 mm thick; bracts sublanceolate, ca. 1.5 mm.
Female flowers: pedicel ca. 1.5 mm; sepals 5 or 6, lanceolate, 2.5-3 mm, tomentose; ovary densely softly spiny, stellate-pilose; styles 3, free, ca. 3 mm, plumose. Infructescence erect.
Fruiting pedicel ca. 1.5 mm; capsule ca. 1.5 cm in diam., densely softly spiny, brownish, ca. 5 mm, stellate-pilose. Seeds subglobose, blackish, ca. 5 mm in diam., verruculose. Fl. and fr. Jun-Jul.
Mountain valleys or slopes, thickets; 1700-2500 m. Xizang, Yunnan [Bhutan, NE India, Myanmar, Nepal].
分類文獻
Mallotus nepalensis Muell. Arg. in Linnaea 34: 188. 1865; Airy Shaw in Kew Bull. 21: 387. 1968; T. L. Chin in F1. Xizang. 3: 78. 1986.
尼泊爾野桐生長環境
生於海拔1700-2700米的常綠闊葉林或雜木林中。
尼泊爾野桐分布範圍
分布於西藏和雲南。尼泊爾、錫金也有。