燕石斛（台湾兰）套叶石斛（中国高等植物图鉴）燕子石斛（台湾植物志）
Dendrobium equitans Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 228, fig. 16 (c-d). 1910; Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 208. 1919; S. Y. Hu in Quart. J. Taiwan Mus. 26 (1, 2): 154. 1973; 台湾兰科植物1: 126-127 (图). 1975; 中国高等植物图鉴 5: 704. 982. 1976; 台湾兰科植物彩色图志1: 367. 图56. 1996. ——D. batanense Ames et Quisumbing in Philip. J. Sci. 47 (2): 200, t. 5, 16, 17. 1932. ——D. ventricosum auct. non Kraenzl.: 台湾植物志5: 969, 图1584. 1978.
Epiphytic on tree trunks in forests; 100-300 m. S Taiwan (Lan Yu) [Philippines]. This species has been misidentified in Taiwan as Dendrobium ventricosum Kraenzlin (e.g., in Fl. Taiwan. 5: 969. 1978). |
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Stems erect, cylindric, compressed, to 40 cm, 1 or 2 internodes above base dilated and fusiform, 2-3 cm. |
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Leaves distichous, ascending, laterally compressed and dagger-shaped, 4-7 cm × 3-4(or more) mm, fleshy, base with tightly clasping fleshy sheaths, apex acute. |
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Inflorescence axillary in distal leaf axil; floral bracts sheathlike, ca. 4 mm, membranous. Pedicel and ovary ca. 1 cm. Flowers usually solitary, each lasting 1 or 2 days, not opening widely, creamy white, disk yellow in center. Dorsal sepal ovate-lanceolate, ca. 15 mm, ca. 3.5 mm wide at middle, acute; lateral sepals obliquely ovate-lanceolate, nearly as long as dorsal sepal, base oblique; mentum angulate, 8-10 mm. Petals obovate-lanceolate, nearly as large as dorsal sepal, 3-veined, apex acute; lip obovate, ca. 18 mm, ca. 9 mm wide at middle, 3-lobed above middle, base cuneate; lateral lobes erect, subobovate, front margin denticulate; mid-lobe orbicular or transversely oblong, margin lacerate or fimbriate, apex rounded; disk densely finely papillate-hairy. Column ca. 2 mm; anther cap subquadrate, glabrous. Flowering June-September. |
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