屏边叉柱兰  转到中国兰科植物志

Cheirostylis pingbianensis  分类来源:中国植物志

屏边叉柱兰(植物分类学报) 

Cheirostylis pingbianensis K. Y. Lang in Acta Phytotax. Sin. 34(6): 635, fig. 1. 1996. 

Shaded humid areas in dense forests; ca. 2100 m. SE Yunnan.

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Plants 5-10 cm tall. Rhizome elongate, creeping, torose. Stem erect, terete, ca. 5 cm, fleshy, 4-8-leaved. 

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Leaves green, cauline, ovate, 1-2.5 × 0.8-1.7 cm, base rounded, apex acute; petiole-like base and sheath 1-1.5 cm.

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Inflorescence extremely short, to 1 cm, 2- or 3-flowered; peduncle often enclosed by leaf bases and not visible beyond stem apex; floral bracts green, ovate, shorter than ovary, apex acuminate. Flowers glabrous; ovary cylindric-fusiform, 10-12 mm including pedicel, glabrous. Sepals 10-11 mm, connate for ca. 3/5 of length and forming a tube; free dorsal lobe ca. 3.5 mm and lateral lobes ca. 1.8 mm, apex slightly obtuse. Petals appressed to dorsal sepal, narrowly spatulate, slightly oblique, ca. 9 × 2 mm, base attenuate, apex obtuse; lip 8-13 mm, 3-partite; hypochile slightly saccate, ca. 1.5 mm, containing 2 comblike calli; mesochile ca. 4.5 × 2 mm; epichile ca. 2 × 4 mm, 2-lobed and with an acute tooth between 2 lobes; margin of lobes 5- or 6-laciniate, each linear division 1-2 mm. Column ca. 2.5 mm; stelidia linear, ca. 3 mm; anther broadly ovoid, ca. 1.5 mm; rostellum arms to 3.5 mm. Fl. Sep-Oct.

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This species is similar to C.inabei Hayata, but differs from C.inabei Hayata in that its lateral sepals are acutely pointed at the apex, and there are many scattered papillary protrusions in the base capsule of the labial flap. There is no short pointed tooth between the two anterior lobes, and each lobe has a green spot at the base. This species is similar to C. griffithii Lindl., but differs from this species in having larger flowers, lips 15-17 mm long, 8-10 tassel-like lobes at the margin of anterior lobes, one green spot at the base of each lobe, pubescent outside the calyx tube, pubescent ovaries, etc.

Plants 5-10 cm tall. Rhizome elongate, creeping, torose. Stem erect, terete, ca. 5 cm, fleshy, 4-8-leaved. Leaves green, cauline, ovate, 1-2.5 × 0.8-1.7 cm, base rounded, apex acute; petiole-like base and sheath 1-1.5 cm. Inflorescence extremely short, to 1 cm, 2- or 3-flowered; peduncle often enclosed by leaf bases and not visible beyond stem apex; floral bracts green, ovate, shorter than ovary, apex acuminate. Flowers glabrous; ovary cylindric-fusiform, 10-12 mm including pedicel, glabrous. Sepals 10-11 mm, connate for ca. 3/5 of length and forming a tube; free dorsal lobe ca. 3.5 mm and lateral lobes ca. 1.8 mm, apex slightly obtuse. Petals appressed to dorsal sepal, narrowly spatulate, slightly oblique, ca. 9 × 2 mm, base attenuate, apex obtuse; lip 8-13 mm, 3-partite; hypochile slightly saccate, ca. 1.5 mm, containing 2 comblike calli; mesochile ca. 4.5 × 2 mm; epichile ca. 2 × 4 mm, 2-lobed and with an acute tooth between 2 lobes; margin of lobes 5- or 6-laciniate, each linear division 1-2 mm. Column ca. 2.5 mm; stelidia linear, ca. 3 mm; anther broadly ovoid, ca. 1.5 mm; rostellum arms to 3.5 mm. Fl. Sep-Oct.

● Shaded humid areas in dense forests; ca. 2100 m. SE Yunnan.

This species is clearly closely related to Cheirostylis octodactyla. More material is required on which to base a critical comparison.

 



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