头序无柱兰Amitostigma capitatum Tang et Wang
头序无柱兰Amitostigma capitatum Tang et Wang
7.头序无柱兰（中国高等植物图鉴）图版56: 5
Amitostigma capitatum T. Tang et F. T. Wang in Bull. Fan Mem. Inst. Biol. Bot. 7: 4, 1936; 中国高等植物图鉴5: 626,图8081. 1976; T. Tang, F. T. Wang et K. Y. Lang in Acta Phytotax. Sin. 20(1): 79. 1982.
植株高8-14厘米。块茎椭圆形，长6-8毫米，肉质。茎纤细，直立或近直立，基部具2枚筒状鞘，在中部或中部之上具1枚叶，圆柱形，光滑。叶片狭椭圆形或狭长圆形，直立伸展，长3.5-5厘米，宽5-15毫米，先端急尖，基部收狭并抱茎。总状花序具几朵至10余朵花，由于花序轴缩短近呈头状，宽倒卵形，长8-10毫米；花苞片披针形，先端渐尖，与子房等长或近等长；子房圆柱状纺锤形，稍扭转，无毛，连花梗长4-5毫米；花小，白色，不偏向一侧，花瓣、唇瓣和萼片的内面均具多数细乳突；中萼片卵状椭圆形，直立，凹陷呈舟状，长2-2.2毫米，宽1.5-1.7毫米，先端钝，边缘全缘，具1脉；侧萼片斜卵状椭圆形，上举，长2.5-3毫米，宽2-2.2毫米，先端钝，边缘全缘，具1脉；花瓣斜宽卵形，直立，长1.5-1.8毫米，宽1.8-2毫米，先端钝，边缘全缘，具2脉；唇瓣向前伸出，较花瓣和萼片长、大，轮廓为三角状倒卵形，长约5毫米，展平时侧裂片先端之间宽3.3毫米，基部凹陷呈舟状，具距，基部之上3裂，侧裂片稍斜线形，长约1.5毫米，宽约0.5毫米，先端钝，边缘全缘，中裂片线形，先端具3枚齿，中间的齿较两侧的齿短而小；距圆球状，下垂，长约1毫米，为子房的1/5;蕊柱粗壮，直立；花药卵球形，先端稍钝，2室，药室并行，卵形；花粉团圆球形，具短的花粉团柄和粘盘，粘盘小，长圆形，裸露；蕊喙小，三角形；柱头2个，隆起，棒状，从蕊喙之下伸出，退化雄蕊2个，小，半圆形。花期7月。
产于湖北西部和四川东部至西部。生于海拔2600-3600米的山坡林内阴湿处覆有土的岩石上。模式标本采自四川西部。
《Flora of China》 Vol. 25 (2009)
Amitostigma capitatum Tang & F. T. Wang Bull. Fan Mem. Inst. Biol. Bot. 7: 4. 1936.
头序无柱兰 tou xu wu zhu lan
Plants 8-14 cm tall. Tubers ellipsoid, 6-8 mm. Stem with 1 or 2 tubular sheaths at base, 1-leaved. Leaf cauline, porrect, narrowly elliptic to narrowly oblong, 3.5-5 × 0.5-1.5 cm, apex acute. Peduncle ebracteate; rachis 0.8-1 cm, densely several to more than 10-flowered; floral bracts lanceolate, 3-5 mm, nearly as long as ovary, apex acuminate. Flowers white; ovary and pedicel 4-6 mm. Dorsal sepal ovate-elliptic, concave, 2-2.2 × 1.5-1.7 mm, inner surface finely papillate, 1-veined, apex obtuse; lateral sepals ovate-elliptic, oblique, 2.5-3 × 2-2.2 mm, inner surfaces finely papillate, 1-veined, apex obtuse. Petals broadly ovate, oblique, 1.5-1.8 × 1.8-2 mm, inner surfaces finely papillate, 2-veined, apex obtuse; lip obovate, ca. 5 × 3.3 mm, concave at base, 3-lobed near middle; lateral lobes ovate-oblong, slightly oblique, ca. 1.5 × 0.5 mm, apex obtuse; mid-lobe oblong, ca. 1.6 × 0.5 mm, apex truncate and shallowly notched, sinus with a small, acute tooth; spur pendulous, globose, ca. 1 mm, apex rounded; viscidia oblong; stigma lobes clavate. Fl. Jul.
● Rocky soils and damp places in forests; 2600-3600 m. W Hubei, E and W Sichuan.
别名：
科名：兰科 Orchidaceae
属名：无柱兰属 Amitostigma
7.头序无柱兰（中国高等植物图鉴）图版56: 5
Amitostigma capitatum T. Tang et F. T. Wang in Bull. Fan Mem. Inst. Biol. Bot. 7: 4, 1936; 中国高等植物图鉴5: 626,图8081. 1976; T. Tang, F. T. Wang et K. Y. Lang in Acta Phytotax. Sin. 20(1): 79. 1982.
植株高8-14厘米。块茎椭圆形，长6-8毫米，肉质。茎纤细，直立或近直立，基部具2枚筒状鞘，在中部或中部之上具1枚叶，圆柱形，光滑。叶片狭椭圆形或狭长圆形，直立伸展，长3.5-5厘米，宽5-15毫米，先端急尖，基部收狭并抱茎。总状花序具几朵至10余朵花，由于花序轴缩短近呈头状，宽倒卵形，长8-10毫米；花苞片披针形，先端渐尖，与子房等长或近等长；子房圆柱状纺锤形，稍扭转，无毛，连花梗长4-5毫米；花小，白色，不偏向一侧，花瓣、唇瓣和萼片的内面均具多数细乳突；中萼片卵状椭圆形，直立，凹陷呈舟状，长2-2.2毫米，宽1.5-1.7毫米，先端钝，边缘全缘，具1脉；侧萼片斜卵状椭圆形，上举，长2.5-3毫米，宽2-2.2毫米，先端钝，边缘全缘，具1脉；花瓣斜宽卵形，直立，长1.5-1.8毫米，宽1.8-2毫米，先端钝，边缘全缘，具2脉；唇瓣向前伸出，较花瓣和萼片长、大，轮廓为三角状倒卵形，长约5毫米，展平时侧裂片先端之间宽3.3毫米，基部凹陷呈舟状，具距，基部之上3裂，侧裂片稍斜线形，长约1.5毫米，宽约0.5毫米，先端钝，边缘全缘，中裂片线形，先端具3枚齿，中间的齿较两侧的齿短而小；距圆球状，下垂，长约1毫米，为子房的1/5;蕊柱粗壮，直立；花药卵球形，先端稍钝，2室，药室并行，卵形；花粉团圆球形，具短的花粉团柄和粘盘，粘盘小，长圆形，裸露；蕊喙小，三角形；柱头2个，隆起，棒状，从蕊喙之下伸出，退化雄蕊2个，小，半圆形。花期7月。
产于湖北西部和四川东部至西部。生于海拔2600-3600米的山坡林内阴湿处覆有土的岩石上。模式标本采自四川西部。
《Flora of China》 Vol. 25 (2009)
Amitostigma capitatum Tang & F. T. Wang Bull. Fan Mem. Inst. Biol. Bot. 7: 4. 1936.
头序无柱兰 tou xu wu zhu lan
Plants 8-14 cm tall. Tubers ellipsoid, 6-8 mm. Stem with 1 or 2 tubular sheaths at base, 1-leaved. Leaf cauline, porrect, narrowly elliptic to narrowly oblong, 3.5-5 × 0.5-1.5 cm, apex acute. Peduncle ebracteate; rachis 0.8-1 cm, densely several to more than 10-flowered; floral bracts lanceolate, 3-5 mm, nearly as long as ovary, apex acuminate. Flowers white; ovary and pedicel 4-6 mm. Dorsal sepal ovate-elliptic, concave, 2-2.2 × 1.5-1.7 mm, inner surface finely papillate, 1-veined, apex obtuse; lateral sepals ovate-elliptic, oblique, 2.5-3 × 2-2.2 mm, inner surfaces finely papillate, 1-veined, apex obtuse. Petals broadly ovate, oblique, 1.5-1.8 × 1.8-2 mm, inner surfaces finely papillate, 2-veined, apex obtuse; lip obovate, ca. 5 × 3.3 mm, concave at base, 3-lobed near middle; lateral lobes ovate-oblong, slightly oblique, ca. 1.5 × 0.5 mm, apex obtuse; mid-lobe oblong, ca. 1.6 × 0.5 mm, apex truncate and shallowly notched, sinus with a small, acute tooth; spur pendulous, globose, ca. 1 mm, apex rounded; viscidia oblong; stigma lobes clavate. Fl. Jul.
● Rocky soils and damp places in forests; 2600-3600 m. W Hubei, E and W Sichuan.