反瓣石斛 Dendrobium ellipsophyllum
中文名（Chinese Name）：反瓣石斛
学名（Scientific Name）：Dendrobium ellipsophyllum T. Tang et F. T. Wang
英文名（English Common Name）：
别名（Chinese Common Name）：黄毛石斛
异名（Synonym）：Dendrobium revolutum Lindl.:Z. H. Tsi Distichorchis ellipsophylla (Tang & F.T.Wang) M.A.Clem.
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎直立或斜立，圆柱形，长约50厘米，粗约5毫米，上下等粗，具纵条棱，不分枝，具多数节；节间长约2厘米，被叶鞘所包裹。叶二列，紧密互生于整个茎上，舌状披针形，长4-5厘米，宽15-19毫米，先端钝并且不等侧2裂，基部心形抱茎并且下延为紧抱于茎的鞘。花白色，常单朵从具叶的老茎上部发出，与叶对生，具香气；花苞片小；花梗连同子房纤细，下弯，长约2厘米；中萼片反卷，卵状长圆形，长约8毫米，宽约5毫米，先端急尖；侧萼片反卷，长圆状披针形，长8毫米，宽5毫米，先端急尖；萼囊角状，长约7毫米；花瓣反卷，狭披针形，长7毫米，宽约4毫米，先端急尖；唇瓣肉质，比萼片大，3裂，沿中轴线多少下弯而折叠；侧裂片小，三角形，长约2毫米，先端锐尖；中裂片较大，近横长圆形或圆形，长10毫米，宽约15毫米，先端近截形而具宽凹缺，唇盘中部以上黄色，中央具3条褐紫色的龙骨脊。花期6月。
分布（Distribution）：产云南。生于海拔1100米的山地阔叶林中树干上。东南亚也有。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 369, 388
Dendrobium ellipsophyllum Tang & F. T. Wang, Acta Phytotax. Sin. 1: 81. 1951.
反瓣石斛 fan ban shi hu| Orchidaceae | Dendrobium
Distichorchis ellipsophylla (Tang & F. T. Wang) M. A. Clements.
Stems erect or ascending, cylindric, ca. 50 cm, ca. 5 mm in diam., uniformly thick, with longitudinal ribs, unbranched, with many nodes, internodes ca. 2 cm, enclosed in leaf sheaths. Leaves alternate and dense along whole stem, elliptic, 4-5 × 1.5-1.9(or more) cm, base cordate, clasping and decurrent into sheaths tightly embracing stem, apex obtuse and unequally 2-lobed. Inflorescences many, (apparently) leaf-opposed, 1-flowered; floral bracts small. Pedicel and ovary bent downward, ca. 2 cm, slender. Flowers scented, white, disk yellow above middle, keels brownish purple. Dorsal sepal reflexed, ovate-oblong, ca. 8 × 5 mm, apex acute; lateral sepals reflexed, oblong-lanceolate, ca. 8 × 5 mm, apex acute; mentum angulate, ca. 7 mm. Petals recurved, narrowly lanceolate, ca. 7 × 4 mm, apex acute; lip larger than sepals, fleshy, 3-lobed, ± decurved and folded along axis; lateral lobes deltoid, small, ca. 2 mm, acute; mid-lobe nearly transversely oblong or rounded, somewhat large, ca. 10 × 15 mm, subtruncate and broadly emarginate, central part of disk with 3 keeled ridges.
Epiphytic on tree trunks in broad-leaved mountain forests; ca. 1100 m. SE Yunnan (Menghai, Mengla) [Cambodia, Laos, Myanmar, Thailand, Vietnam].
This species was misidentified by Z. H. Tsi (Acta Phytotax. Sin. 18: 434. 1980) as Dendrobium revolutum Lindley.
（责任编辑：徐晔春）
学名（Scientific Name）：Dendrobium ellipsophyllum T. Tang et F. T. Wang
英文名（English Common Name）：
别名（Chinese Common Name）：黄毛石斛
异名（Synonym）：Dendrobium revolutum Lindl.:Z. H. Tsi Distichorchis ellipsophylla (Tang & F.T.Wang) M.A.Clem.
科属（Family & Genus）：兰科（Orchidaceae）石斛属
形态特征（Description）：茎直立或斜立，圆柱形，长约50厘米，粗约5毫米，上下等粗，具纵条棱，不分枝，具多数节；节间长约2厘米，被叶鞘所包裹。叶二列，紧密互生于整个茎上，舌状披针形，长4-5厘米，宽15-19毫米，先端钝并且不等侧2裂，基部心形抱茎并且下延为紧抱于茎的鞘。花白色，常单朵从具叶的老茎上部发出，与叶对生，具香气；花苞片小；花梗连同子房纤细，下弯，长约2厘米；中萼片反卷，卵状长圆形，长约8毫米，宽约5毫米，先端急尖；侧萼片反卷，长圆状披针形，长8毫米，宽5毫米，先端急尖；萼囊角状，长约7毫米；花瓣反卷，狭披针形，长7毫米，宽约4毫米，先端急尖；唇瓣肉质，比萼片大，3裂，沿中轴线多少下弯而折叠；侧裂片小，三角形，长约2毫米，先端锐尖；中裂片较大，近横长圆形或圆形，长10毫米，宽约15毫米，先端近截形而具宽凹缺，唇盘中部以上黄色，中央具3条褐紫色的龙骨脊。花期6月。
分布（Distribution）：产云南。生于海拔1100米的山地阔叶林中树干上。东南亚也有。
用途（Use）：
引自中国植物志英文版：FOC Vol. 25 Page 369, 388
Dendrobium ellipsophyllum Tang & F. T. Wang, Acta Phytotax. Sin. 1: 81. 1951.
反瓣石斛 fan ban shi hu| Orchidaceae | Dendrobium
Distichorchis ellipsophylla (Tang & F. T. Wang) M. A. Clements.
Stems erect or ascending, cylindric, ca. 50 cm, ca. 5 mm in diam., uniformly thick, with longitudinal ribs, unbranched, with many nodes, internodes ca. 2 cm, enclosed in leaf sheaths. Leaves alternate and dense along whole stem, elliptic, 4-5 × 1.5-1.9(or more) cm, base cordate, clasping and decurrent into sheaths tightly embracing stem, apex obtuse and unequally 2-lobed. Inflorescences many, (apparently) leaf-opposed, 1-flowered; floral bracts small. Pedicel and ovary bent downward, ca. 2 cm, slender. Flowers scented, white, disk yellow above middle, keels brownish purple. Dorsal sepal reflexed, ovate-oblong, ca. 8 × 5 mm, apex acute; lateral sepals reflexed, oblong-lanceolate, ca. 8 × 5 mm, apex acute; mentum angulate, ca. 7 mm. Petals recurved, narrowly lanceolate, ca. 7 × 4 mm, apex acute; lip larger than sepals, fleshy, 3-lobed, ± decurved and folded along axis; lateral lobes deltoid, small, ca. 2 mm, acute; mid-lobe nearly transversely oblong or rounded, somewhat large, ca. 10 × 15 mm, subtruncate and broadly emarginate, central part of disk with 3 keeled ridges.
Epiphytic on tree trunks in broad-leaved mountain forests; ca. 1100 m. SE Yunnan (Menghai, Mengla) [Cambodia, Laos, Myanmar, Thailand, Vietnam].
This species was misidentified by Z. H. Tsi (Acta Phytotax. Sin. 18: 434. 1980) as Dendrobium revolutum Lindley.
（责任编辑：徐晔春）
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