All Floras      Advanced Search
FOC Vol. 25 Page 371, 387 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 25 | Orchidaceae | Dendrobium

50. Dendrobium dixanthum H. G. Reichenbach, Gard. Chron. 1865: 674. 1865.

黄花石斛 huang hua shi hu

Callista dixantha (H. G. Reichenbach) Kuntze.

Stems erect or pendulous, cylindric, 50-100 cm, slender, 3-6 mm in diam., unbranched, deciduous, with many nodes, internodes 2.5-3 cm, with many longitudinal ridges, pale yellow when dry. Leaves ovate-lanceolate, 8-11(-13) × ca. 1 cm, leathery, base with clasping sheath, apex long acuminate. Inflorescences often 2-4, from old leafless stems, 2-5-flowered; peduncle 1-2 cm, slender; basal sheaths 2 or 3, short, membranous; floral bracts ovate, ca. 2 mm, membranous, acute. Pedicel and ovary ca. 2 cm, slender. Flowers spreading, thinly textured, deep yellow, lip with purplish red stripes on either side at base. Dorsal sepal oblong-lanceolate, ca. 23 × 6 mm, 5-veined, apex acute; lateral sepals equal in size to dorsal sepal, base slightly oblique; mentum subcylindric, ca. 4 mm. Petals suboblong, ca. 23 × 10 mm, 5-veined, base contracted, margin irregularly denticulate, apex acute; lip suborbicular, ca. 22 × 25 mm, adaxially densely barbellate, margin erose, apex emarginate. Column very short, ca. 5 mm, foot ca. 4 mm; anther cap conic, densely finely papillate, front margin irregularly dentate, apex obtuse. Capsule narrowly cylindric, 6-7 × 0.5-0.6 cm, with a stalk ca. 1 cm.

Epiphytic on tree trunks in mountain forests; 800-1200 m. S Yunnan [Laos, Myanmar, Thailand].

This species was misidentified by S. C. Chen and Z. H. Tsi (Orchids China, 156. 1998) as Dendrobium moulmeinense (a synonym of D. devonianum in the present treatment).


Flora of China @
Browse by
Advanced Search

Flora of China Home




 |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |