广西石斛（新拟）
Dendrobium guangxiense S. J. Cheng et C. Z. Tang in Orch. Dig. (May-June): 95-97 (fig). 1986. ——D. officinale auct. non Kimura et Migo: Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 83, pl. 105. 1997.
Lithophytic on rocks or epiphytic on trees; ca. 1500 m. Guangxi, Yunnan [Vietnam].
The shape and structure of the flowers of this species, especially the lips, are very similar to those of Dendrobium curvatum, but the stems are long and not folded. The sepals and petals are different in color and can be distinguished.
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Stems erect, slender, to 60 cm, 2-3 mm in diam. |
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Leaves oblong, 4-4.5 × 1-1.5 cm, leathery, base sheathing. |
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Inflorescences on old leafless stems, 1-3-flowered. Pedicel and ovary ca. 2.5 cm. Flowers whitish to yellowish, tinted pink, lip pale yellow flushed purple at base, with a purple transverse mark, anther cap wholly bright purple. Dorsal sepal ovate-lanceolate, ca. 15 mm, 5-veined, acute; lateral sepals ca. 16 mm, ca. 13 mm wide at base, 5-veined, subacute. Petals lanceolate, ca. 14 × 6 mm, very thin textured, subacute; lip 3-lobed, ca. 12 mm, ca. 9 mm wide at middle, margins serrulate, minutely pubescent near base; lateral lobes orbicular, ca. 4 mm in diam.; mid-lobe similar to lateral lobes, broadly ovate, ca. 6 mm, apex acute; disk ca. 4 mm, with central, ± square, swollen callosity. Column short. Flowering : April-May.
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