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窄唇蜘蛛兰Arachnis labrosa

时间:2013-10-23 15:33来源:未知 作者:徐晔春 点击:
中文名 ( Chinese Name ): 窄唇蜘蛛兰 学名 ( Scientific Name ): Arachnis labrosa (Lindl. ex Paxt.) Rchb. f. 英文名 ( English Common Name ): 别名 ( Chinese Common Name ): 异名 ( Synonym ): Arrhynchium labrosum Lindl. ex Paxton
中文名Chinese Name):窄唇蜘蛛兰
学名Scientific Name):Arachnis labrosa (Lindl. ex Paxt.) Rchb. f.
英文名English Common Name):
别名Chinese Common Name):
异名Synonym):Arrhynchium labrosum Lindl. ex Paxton  Renanthera bilinguis Rchb. f.  Armodorum labrosum (Lindl. ex Paxton) Schltr.  Arachnis bilinguis Benth.  Arachnanthe bilinguis Benth.  Renanthera labrosa (Lindl. & Paxton) Rchb.f.  Renanthera leptantha Fukuy. ex A.T.Hsieh  Arhynchium labrosum Lindl. & Paxton
科属Family & Genus):兰科Orchidaceae蜘蛛兰属Arachnis
形态特征Description):茎伸长,达50厘米,粗7-10毫米,质地硬,具多数节和互生多数二列的叶。叶革质,带状,长15-30厘米,宽1.6-2.2厘米或更宽,先端钝并且具不等侧2裂,基部具抱茎的鞘;叶鞘套叠,宿存。花序斜出,长达1米,具分枝;花序柄和花序轴细圆柱形,圆锥花序疏生多数花;花苞片红棕色,宽卵形,长5-8毫米,先端钝;花梗和子房棕色,纤细,长约2厘米;花淡黄色带红棕色斑点,开展,萼片和花瓣倒披针形;萼片长约1.8厘米,宽约3毫米,先端近钝;花瓣比萼片小;唇瓣肉质,长约1厘米,3裂;侧裂片小,直立,近三角形,基部宽约2毫米,先端钝;中裂片厚肉质,舌形,先端锐尖或稍钝并且其背面具1个圆锥形肉突,基部中央凹陷,而其两侧各具1个指向后方的乳突;距位于唇瓣中裂片的中部,圆锥形,厚肉质,长4-5毫米,向后弯曲,距口位于唇瓣的两侧裂片之间和中裂片的基部;蕊柱粗壮,长6毫米,粗4毫米,具不明显的蕊柱足;蕊喙三角形,先端宽宽凹缺;粘盘柄近卵状三角形,长1毫米;粘盘近半圆形,与粘盘柄基部等宽。花期8-9月。
分布(Distribution):产台湾、海南、广西、云南。生于海拔800-1200米的山地林缘树干上或山谷悬岩上。分布于锡金、不丹、印度东北部、缅甸、泰国、越南。
用途(Use):
引自中国植物志英文版:FOC Vol. 25 Page 466   
Arachnis labrosa (Lindley & Paxton) H. G. Reichenbach, Bot. Centralbl. 28: 343. 1886.
窄唇蜘蛛兰 zhai chun zhi zhu lan | Orchidaceae  | Arachnis
Stems to 50 cm, 7-10 mm in diam., rigid, with many nodes and leaves. Leaves distichous; leaf blade lorate or linear, 15-30 × 1.6-2.2 cm, leathery, obtusely unequally bilobed. Inflorescence arising from within leaf sheath, ascending, racemose, to 1 m, occasionally branched, laxly many flowered; floral bracts reddish brown, broadly ovate, 5-8 mm, obtuse. Flowers pale yellow with reddish brown spots or markings mostly along margins and at apex, or greenish yellow without red-brown markings; pedicel and ovary brown, ca. 2 cm, slender. Sepals oblanceolate, ca. 18 × 3 mm, obtuse. Petals oblong, 9-11 × 2-5 mm, subacute; lip ca. 1 cm, fleshy, 3-lobed; lateral lobes erect, subtriangular, small, ca. 2 mm wide at base, obtuse; mid-lobe ligulate, fleshy, acute or obtuse, with a thickened appendage abaxially near apex, base with 2 retrorse calli on both sides, spurred; spur saccate-conic, 4-5 mm, thickly fleshy, its entrance ± covered by calli. Column ca. 6 × 4 mm, stout, base with an inconspicuous foot; rostellum triangular, apex widely emarginate; stipe subovate-triangular, ca. 1 mm; viscidium nearly suborbicular. Fl. Aug-Sep. 2n = 38.
Epiphytic on tree trunks at forest margins, lithophytic on rocks in valleys; 600-1200 m. Guangxi, Hainan, C and S Taiwan, S Yunnan [Bhutan, NE India, ?Japan (Ryukyu Islands), Myanmar, S Vietnam].


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