细叶石斛Dendrobium hancockii
中文名（Chinese Name）：细叶石斛
学名（Scientific Name）：Dendrobium hancockii Rolfe
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Dendrobium odiosum Finet
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎直立，质地较硬，圆柱形或有时基部上方有数个节间膨大而形成纺锤形，长达80厘米，粗2-20毫米，通常分枝，具纵槽或条棱，干后深黄色或橙黄色，有光泽，节间长达4.7厘米。叶通常3-6枚，互生于主茎和分枝的上部，狭长圆形，长3-10厘米，宽3-6毫米，先端钝并且不等侧2裂，基部具革质鞘。总状花序长1-2.5厘米，具1-2朵花，花序柄长5-10毫米；花苞片膜质，卵形，长约2毫米，先端急尖；花梗和子房淡黄绿色，长12-15毫米，子房稍扩大；花质地厚，稍具香气，开展，金黄色，仅唇瓣侧裂片内侧具少数红色条纹；中萼片卵状椭圆形，长 (1-) 1-8-2.4厘米，宽 (3.5-) 5-8毫米，先端急尖，具7条脉；侧萼片卵状披针形，与中萼片等长，但稍较狭，先端急尖，具7条脉；萼囊短圆锥形，长约5毫米；花瓣斜倒卵形或近椭圆形，与中萼片等长而较宽，先端锐尖，具7条脉，唇瓣长宽相等，1-2厘米，基部具1个胼胝体，中部3裂；侧裂片围抱蕊柱，近半圆形，先端圆形；中裂片近扁圆形或肾状圆形，先端锐尖；唇盘通常浅绿色，从两侧裂片之间到中裂片上密布短乳突状毛；蕊柱长约5毫米，基部稍扩大，具长约6毫米的蕊柱足；蕊柱齿近三角形，先端短而钝；药帽斜圆锥形，表面光滑，前面具3条脊，前端边缘具细齿。花期5-6月。
分布（Distribution）：产陕西、甘肃、河南、湖北、湖南、广西、四川、贵州及云南等地。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 370, 384,385, 397
Dendrobium hancockii Rolfe, J. Linn. Soc., Bot. 36: 11. 1903.
细叶石斛 xi ye shi hu | Orchidaceae | Dendrobium
Dendrobium odiosum Finet.
Stems erect, cylindric or sometimes with several nodes dilated and fusiform above base, to 80 cm, 2-20 mm in diam., rigid, usually branching, internodes to 4.7 cm, with longitudinal channels or stripes, deep yellow or orange when dry, glossy. Leaves often 3-6, alternate on main stem and upper part of branches, linear, 2.5-7 × 0.3-0.6(or more) cm, with leathery sheaths at base, apex obtuse and unequally bilobed. Inflorescence 1-2.5 cm, 1- or 2-flowered raceme; peduncle 5-10 mm; floral bracts ovate, ca. 2 mm, membranous, apex acute. Pedicel and ovary pale yellowish green, 12-15 mm; ovary slightly dilated; many clones ± cleistogamous. Normal flowers slightly fragrant, spreading, thickly textured; sepals and petals golden yellow, lip golden yellow, lateral lobes with a few red striations inside, disk often pale green. Dorsal sepal ovate-elliptic, (10-)18-24 × (3.5-)5-8 mm, 7-veined, apex acute; lateral sepals ovate-lanceolate, ca. as long as dorsal sepal, but slightly narrower, 7-veined, apex acute; mentum broadly conic, ca. 5 mm. Petals obliquely obovate or subelliptic, ca. as long as dorsal sepal and broader, 7-veined, apex acute; lip 10-20 mm long and wide, with a basal callus, middle 3-lobed; lateral lobes embracing column, ± subrounded, apex rounded; mid-lobe suboblate or ensiform-rounded, acute; disk with short, dense papillae between lateral lobes and extending to mid-lobe. Column ca. 5 mm, base slightly dilated, foot ca. 6 mm; column teeth subtriangular, apex short and obtuse; anther cap obliquely conic, surface smooth, front with 3 ridges, front margin denticulate.
Epiphytic on tree trunks in mountain forests, lithophytic on rocks in mountain valleys; 700-1500 m. S Gansu, NW Guangxi, S Guizhou, Henan, SE Hubei, SE Hunan, Shaanxi, S Sichuan, NE and SE Yunnan [N Vietnam].
One of us (H. P. Wood, Dendrobiums, 638. 2006) has noted that the sectional placement of Dendrobium hancockii remains unclear. In addition, two entities are being offered as D. hancockii in the horticultural trade, both often mislabeled "D. hainanense." One, true D. hancockii, has leaves linear, retuse, ca. 3 cm × 3 mm; petals clavate; and lip inrolled with clear lateral lobes. The other, an undescribed taxon, has leaves lanceolate, ca. 15 cm × 3 mm; sepals and petals narrower and pointed; and lip flat, cordate, with lateral lobes indistinct.
（责任编辑：徐晔春）
学名（Scientific Name）：Dendrobium hancockii Rolfe
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Dendrobium odiosum Finet
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎直立，质地较硬，圆柱形或有时基部上方有数个节间膨大而形成纺锤形，长达80厘米，粗2-20毫米，通常分枝，具纵槽或条棱，干后深黄色或橙黄色，有光泽，节间长达4.7厘米。叶通常3-6枚，互生于主茎和分枝的上部，狭长圆形，长3-10厘米，宽3-6毫米，先端钝并且不等侧2裂，基部具革质鞘。总状花序长1-2.5厘米，具1-2朵花，花序柄长5-10毫米；花苞片膜质，卵形，长约2毫米，先端急尖；花梗和子房淡黄绿色，长12-15毫米，子房稍扩大；花质地厚，稍具香气，开展，金黄色，仅唇瓣侧裂片内侧具少数红色条纹；中萼片卵状椭圆形，长 (1-) 1-8-2.4厘米，宽 (3.5-) 5-8毫米，先端急尖，具7条脉；侧萼片卵状披针形，与中萼片等长，但稍较狭，先端急尖，具7条脉；萼囊短圆锥形，长约5毫米；花瓣斜倒卵形或近椭圆形，与中萼片等长而较宽，先端锐尖，具7条脉，唇瓣长宽相等，1-2厘米，基部具1个胼胝体，中部3裂；侧裂片围抱蕊柱，近半圆形，先端圆形；中裂片近扁圆形或肾状圆形，先端锐尖；唇盘通常浅绿色，从两侧裂片之间到中裂片上密布短乳突状毛；蕊柱长约5毫米，基部稍扩大，具长约6毫米的蕊柱足；蕊柱齿近三角形，先端短而钝；药帽斜圆锥形，表面光滑，前面具3条脊，前端边缘具细齿。花期5-6月。
分布（Distribution）：产陕西、甘肃、河南、湖北、湖南、广西、四川、贵州及云南等地。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 370, 384,385, 397
Dendrobium hancockii Rolfe, J. Linn. Soc., Bot. 36: 11. 1903.
细叶石斛 xi ye shi hu | Orchidaceae | Dendrobium
Dendrobium odiosum Finet.
Stems erect, cylindric or sometimes with several nodes dilated and fusiform above base, to 80 cm, 2-20 mm in diam., rigid, usually branching, internodes to 4.7 cm, with longitudinal channels or stripes, deep yellow or orange when dry, glossy. Leaves often 3-6, alternate on main stem and upper part of branches, linear, 2.5-7 × 0.3-0.6(or more) cm, with leathery sheaths at base, apex obtuse and unequally bilobed. Inflorescence 1-2.5 cm, 1- or 2-flowered raceme; peduncle 5-10 mm; floral bracts ovate, ca. 2 mm, membranous, apex acute. Pedicel and ovary pale yellowish green, 12-15 mm; ovary slightly dilated; many clones ± cleistogamous. Normal flowers slightly fragrant, spreading, thickly textured; sepals and petals golden yellow, lip golden yellow, lateral lobes with a few red striations inside, disk often pale green. Dorsal sepal ovate-elliptic, (10-)18-24 × (3.5-)5-8 mm, 7-veined, apex acute; lateral sepals ovate-lanceolate, ca. as long as dorsal sepal, but slightly narrower, 7-veined, apex acute; mentum broadly conic, ca. 5 mm. Petals obliquely obovate or subelliptic, ca. as long as dorsal sepal and broader, 7-veined, apex acute; lip 10-20 mm long and wide, with a basal callus, middle 3-lobed; lateral lobes embracing column, ± subrounded, apex rounded; mid-lobe suboblate or ensiform-rounded, acute; disk with short, dense papillae between lateral lobes and extending to mid-lobe. Column ca. 5 mm, base slightly dilated, foot ca. 6 mm; column teeth subtriangular, apex short and obtuse; anther cap obliquely conic, surface smooth, front with 3 ridges, front margin denticulate.
Epiphytic on tree trunks in mountain forests, lithophytic on rocks in mountain valleys; 700-1500 m. S Gansu, NW Guangxi, S Guizhou, Henan, SE Hubei, SE Hunan, Shaanxi, S Sichuan, NE and SE Yunnan [N Vietnam].
One of us (H. P. Wood, Dendrobiums, 638. 2006) has noted that the sectional placement of Dendrobium hancockii remains unclear. In addition, two entities are being offered as D. hancockii in the horticultural trade, both often mislabeled "D. hainanense." One, true D. hancockii, has leaves linear, retuse, ca. 3 cm × 3 mm; petals clavate; and lip inrolled with clear lateral lobes. The other, an undescribed taxon, has leaves lanceolate, ca. 15 cm × 3 mm; sepals and petals narrower and pointed; and lip flat, cordate, with lateral lobes indistinct.
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