麻栗坡叉柱兰  转到Flora of China

Cheirostylis malipoensis 分类来源:中国植物志

麻栗坡叉柱兰Cheirostylis malipoensis

麻栗坡唇瓣与云南叉柱兰唇瓣相似,不同之处在于它的根茎节间两端收狭;唇瓣后唇具纵向间隔的次生腺体和星状浅裂腺体。此外,麻栗叉柱兰与云南叉柱兰有同域性,但开花期不同。云南叉柱兰为花期3~4月,麻栗叉柱兰花期为12~1月。

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茎:地生或附生,植株长达10cm。根状茎匍匐,肉质,具节,长0.8—1cm,直径2—2.5毫米。根通常聚集在节间的中部。茎长0.5—1cm。

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叶:叶1—4,心形,先端锐尖,长1.2cm,宽0.9cm;叶柄管状,长0.8cm。

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花:总状花序具2—4朵花;圆柱状花序梗,短柔毛,具鞘,长7—9cm;鞘2—3枚,披针形,短柔毛,长1.2—1.5厘米;花苞片披针形,先端渐尖,长0.7—0.9cm,长于子房和花梗。花白色,长1cm;子房和花梗短柔毛,长0.5—0.6厘米;萼片近相似,被微柔毛(乳突),萼片椭圆形,长5mm,宽2.5mm,中部合生成筒状;侧萼片椭圆形,长5毫米,宽1.8毫米,先端锐尖。花瓣斜镰刀形,长4mm,宽1.5mm,先端锐尖。唇瓣长7mm,宽6mm;下唇囊状,长圆形,无毛,长2毫米,宽1.5毫米,被一个高的纵向隔膜分成两部分,每个部分有一个星状浅裂腺体;唇瓣的中部(爪)被短柔毛,长1毫米,宽1毫米;上唇半圆形,深2裂,基部有2个突出的绿色斑点;裂片扇形,长4毫米,宽4毫米,边缘3-5齿。蕊柱长1mm;直径长1毫米,长于喙突臂。药帽顶端钝。

 

花期:12~1月。

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Cheirostylis malipoensis X. H. Jin & S. C. Chen, Acta Phytotax. Sin. 45: 797. 2007.

麻栗坡叉柱兰 ma li po cha zhu lan

Plants 10-12 cm tall. Rhizome creeping, 8-20 × 2-2.5 mm, fleshy, nodes slightly contracted. Stem erect, 5-30 mm, 1-4-leaved. Leaves green, often reticulated with dark green, ovate-cordate, 1.2-2 × 0.9-1.2 cm, apex acute to subacuminate; petiole-like base and sheath 0.6-0.8 cm. Inflorescence 6-9 cm, pubescent, with 2 or 3 sterile bracts; rachis short, usually less than 1 cm, 2-4-flowered; floral bracts ovate-lanceolate, 7-9 mm, apex acuminate. Flowers white; pedicel and ovary 4-6 mm, sparsely villous. Sepals 4-5 mm, basal 1/2 connate and forming a tube, sparsely villous on outer surface toward base; free apical lobes triangular-ovate, 2-2.5 mm, subobtuse. Petals appressed to dorsal sepal, narrowly lanceolate-oblong, 3.5-4 × ca. 1.5 mm; lip 6-9 mm, 3-partite; hypochile saccate, ca. 2 × 1.5 mm, divided by a longitudinal septum into 2 parts, each part with 2 horn-shaped calli (rarely with just 1 callus on each side); mesochile ca. 1 mm; epichile with 2 green or beige spots at base, deeply bilobed; lobes flabellate, ca. 4 × 4 mm, apical margin 3-5-toothed. Column 1-2 mm; stelidia ca. 1 mm, slightly longer than rostellum arms. Fl. Dec-Feb.

● Forests on limestone mountains, thickets; ca. 1100 m. SE Yunnan.