束花石斛 Dendrobium chrysanthum
中文名（Chinese Name）：束花石斛
学名（Scientific Name）：Dendrobium chrysanthum Lindl.
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Dendrobium ochreatum Lindl.:Z. H. Tsi et S. C. Chen Callista chrysantha (Wall. ex Lindl.) Kuntze Dendrobium chrysanthum var. anophthalama Rchb.f. Dendrobium chrysanthum var. microphthalama Rchb.f.
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎粗厚，肉质，下垂或弯垂，圆柱形，长50-200厘米，粗5-15毫米，上部有时稍回折状弯曲，不分枝，具多节，节间长3-4厘米，干后浅黄色或黄褐色。叶二列，互生于整个茎上，纸质，长圆状披针形，通常长13-19厘米，宽1.5-4.5厘米，先端渐尖，基部具鞘；叶鞘纸质，干后鞘口常杯状张开，常浅白色。伞状花序近无花序柄，每2-6花为一束，侧生于具叶的茎上部；花苞片膜质，卵状三角形，长约3毫米；花梗和子房稍扁，长3.5-6厘米，粗约2毫米；花黄色，质地厚；中萼片多少凹的，长圆形或椭圆形，长15-20毫米，宽9-11毫米，先端钝，具7条脉；侧萼片稍凹的斜卵状三角形，长15-20毫米，基部稍歪斜而较宽，宽约10-12毫米，先端钝，具7条脉；萼囊宽而钝，长约4毫米；花瓣稍凹的倒卵形，长16-22毫米，宽11-14毫米，先端圆形，全缘或有时具细啮蚀状，具7条脉；唇瓣凹的，不裂，肾形或横长圆形，长约18毫米，宽约22毫米，先端近圆形，基部具1个长圆形的胼胝体并且骤然收狭为短爪，上面密布短毛，下面除中部以下外亦密布短毛；唇盘两侧各具1个栗色斑块，具1条宽厚的脊从基部伸向中部；蕊柱长约4毫米，具长约6毫米的蕊柱足；药帽圆锥形，长约2．5毫米，几乎光滑的，前端边缘近全缘。蒴果长圆柱形，长7厘米，粗约1.5厘米。花期9-10月。
分布（Distribution）：产广西、贵州、云南、西藏等地，生于海拔700～2500米的山地密林中树干上或山谷阴湿的岩石上。东南亚也有。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 371, 377
Dendrobium chrysanthum Wallich ex Lindley, Edwards’s Bot. Reg. 15: ad t. 1299. 1829.
束花石斛 shu hua shi hu| Orchidaceae | Dendrobium
Callista chrysantha (Wallich ex Lindley) Kuntze; Dendrobium chrysanthum var. anophthalma H. G. Reichenbach; D. chrysanthum var. microphthalma H. G. Reichenbach.
Stems pendulous or curving, cylindric, 50-200 cm, stout, 5-15 mm in diam., upper part sometimes upcurved, fleshy, unbranched, with many nodes, internodes 3-4 cm, pale yellow or yellowish brown when dry. Leaves distichous along entire stem, oblong-lanceolate, usually 13-19 × 1.5-4.5 cm, papery, base sheathing, apex acuminate; leaf sheath papery, sheath mouth often open cupular when dry, often pale white. Inflorescences (apparently) leaf-opposed, lateral, on upper part of mature leafy stems, fasciculate, almost sessile, 2-6-flowered; floral bracts ovate-triangular, ca. 3 mm, membranous. Pedicel and ovary slightly compressed, 3.5-6 cm, ca. 2 mm in diam. Flowers thickly textured, yellow, lip disk with a chestnut blotch on either side. Dorsal sepal ± concave, oblong or elliptic, 15-20 × 9-11(or more) mm, 7-veined, apex obtuse; lateral sepals slightly concave, obliquely ovate-triangular, 15-20 × 10-12 mm, 7-veined, base slightly oblique and broad, apex obtuse; mentum ca. 4 mm, broad and obtuse. Petals slightly concave, obovate, 16-22 × 11-14(or more) mm, 7-veined, margin entire or sometimes finely erose, apex rounded; lip concave, reniform or transversely oblong, ca. 18 × 22 mm, abaxially densely barbellate except for middle, adaxially densely barbellate, base abruptly contracted into short claw, with an oblong callus, margin entire, apex rounded; disk with a broad and thick ridge extending from base to middle. Column ca. 4 mm, foot ca. 6 mm; anther cap conic, ca. 2.5 mm, nearly glabrous, front margin nearly entire. Capsule elongate, cylindric, ca. 7 × 1.5 cm.
Epiphytic on tree trunks in dense forests, lithophytic on wet rocks in valleys; 700-2500 m. W Guangxi, S Guizhou, SE Xizang, S Yunnan [Bhutan, N India, Laos, Myanmar, Nepal, N Thailand, Vietnam].
Z. H. Tsi and S. C. Chen (Acta Phytotax. Sin. 33: 291. 1995) named Chinese material of this species as "Dendrobium ochreatum Lindley" (in Wallich, Numer. List, no. 7410. 1832), which is a nomen nudum and therefore was not validly published.
（责任编辑：徐晔春）
学名（Scientific Name）：Dendrobium chrysanthum Lindl.
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Dendrobium ochreatum Lindl.:Z. H. Tsi et S. C. Chen Callista chrysantha (Wall. ex Lindl.) Kuntze Dendrobium chrysanthum var. anophthalama Rchb.f. Dendrobium chrysanthum var. microphthalama Rchb.f.
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎粗厚，肉质，下垂或弯垂，圆柱形，长50-200厘米，粗5-15毫米，上部有时稍回折状弯曲，不分枝，具多节，节间长3-4厘米，干后浅黄色或黄褐色。叶二列，互生于整个茎上，纸质，长圆状披针形，通常长13-19厘米，宽1.5-4.5厘米，先端渐尖，基部具鞘；叶鞘纸质，干后鞘口常杯状张开，常浅白色。伞状花序近无花序柄，每2-6花为一束，侧生于具叶的茎上部；花苞片膜质，卵状三角形，长约3毫米；花梗和子房稍扁，长3.5-6厘米，粗约2毫米；花黄色，质地厚；中萼片多少凹的，长圆形或椭圆形，长15-20毫米，宽9-11毫米，先端钝，具7条脉；侧萼片稍凹的斜卵状三角形，长15-20毫米，基部稍歪斜而较宽，宽约10-12毫米，先端钝，具7条脉；萼囊宽而钝，长约4毫米；花瓣稍凹的倒卵形，长16-22毫米，宽11-14毫米，先端圆形，全缘或有时具细啮蚀状，具7条脉；唇瓣凹的，不裂，肾形或横长圆形，长约18毫米，宽约22毫米，先端近圆形，基部具1个长圆形的胼胝体并且骤然收狭为短爪，上面密布短毛，下面除中部以下外亦密布短毛；唇盘两侧各具1个栗色斑块，具1条宽厚的脊从基部伸向中部；蕊柱长约4毫米，具长约6毫米的蕊柱足；药帽圆锥形，长约2．5毫米，几乎光滑的，前端边缘近全缘。蒴果长圆柱形，长7厘米，粗约1.5厘米。花期9-10月。
分布（Distribution）：产广西、贵州、云南、西藏等地，生于海拔700～2500米的山地密林中树干上或山谷阴湿的岩石上。东南亚也有。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 371, 377
Dendrobium chrysanthum Wallich ex Lindley, Edwards’s Bot. Reg. 15: ad t. 1299. 1829.
束花石斛 shu hua shi hu| Orchidaceae | Dendrobium
Callista chrysantha (Wallich ex Lindley) Kuntze; Dendrobium chrysanthum var. anophthalma H. G. Reichenbach; D. chrysanthum var. microphthalma H. G. Reichenbach.
Stems pendulous or curving, cylindric, 50-200 cm, stout, 5-15 mm in diam., upper part sometimes upcurved, fleshy, unbranched, with many nodes, internodes 3-4 cm, pale yellow or yellowish brown when dry. Leaves distichous along entire stem, oblong-lanceolate, usually 13-19 × 1.5-4.5 cm, papery, base sheathing, apex acuminate; leaf sheath papery, sheath mouth often open cupular when dry, often pale white. Inflorescences (apparently) leaf-opposed, lateral, on upper part of mature leafy stems, fasciculate, almost sessile, 2-6-flowered; floral bracts ovate-triangular, ca. 3 mm, membranous. Pedicel and ovary slightly compressed, 3.5-6 cm, ca. 2 mm in diam. Flowers thickly textured, yellow, lip disk with a chestnut blotch on either side. Dorsal sepal ± concave, oblong or elliptic, 15-20 × 9-11(or more) mm, 7-veined, apex obtuse; lateral sepals slightly concave, obliquely ovate-triangular, 15-20 × 10-12 mm, 7-veined, base slightly oblique and broad, apex obtuse; mentum ca. 4 mm, broad and obtuse. Petals slightly concave, obovate, 16-22 × 11-14(or more) mm, 7-veined, margin entire or sometimes finely erose, apex rounded; lip concave, reniform or transversely oblong, ca. 18 × 22 mm, abaxially densely barbellate except for middle, adaxially densely barbellate, base abruptly contracted into short claw, with an oblong callus, margin entire, apex rounded; disk with a broad and thick ridge extending from base to middle. Column ca. 4 mm, foot ca. 6 mm; anther cap conic, ca. 2.5 mm, nearly glabrous, front margin nearly entire. Capsule elongate, cylindric, ca. 7 × 1.5 cm.
Epiphytic on tree trunks in dense forests, lithophytic on wet rocks in valleys; 700-2500 m. W Guangxi, S Guizhou, SE Xizang, S Yunnan [Bhutan, N India, Laos, Myanmar, Nepal, N Thailand, Vietnam].
Z. H. Tsi and S. C. Chen (Acta Phytotax. Sin. 33: 291. 1995) named Chinese material of this species as "Dendrobium ochreatum Lindley" (in Wallich, Numer. List, no. 7410. 1832), which is a nomen nudum and therefore was not validly published.
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