Bulbophyllum yingjiangense B.M.Wang & J.W.Zhai, 2017

Zhai, Junwen, Chen, Xiuping, Chen, Yanqiong & Wang, Bingmou, 2017, Bulbophyllum yingjiangense, a new species from Yunnan, China: morphological and molecular evidence (Orchidaceae; Epidendroideae), Phytotaxa 298 (1), pp. 77-82 : 79-80

Bulbophyllum yingjiangense B.M.Wang & J.W.Zhai , sp. nov. Îǐṫ¨± ( Figs. 2 , 3 )

Type:— CHINA. Yunnan: Yingjiang, Xima , 24°45 ′ N, 97°42 ′ E, on the trunks in montane forest, Zhai 0180 (holotype: IBSC; isotype FAFU)

Rhizome stout, 4–6 mm in diameter, densely covered with short tubular sheaths. Pseudobulbs well spaced, ovoid with 4 obvious ridges, ca. 3 cm in diam., smooth and glossy, with scaly sheaths and a single apical leaf. Petiole ca. 1.0– 1.5 cm; leaf blade thickly leathery, subelliptic, usually 13.0–16.0 × 4.5–5.0 cm, apex obtuse, not retuse, base cuneate. Scape from base of pseudobulb, erect, 10–13 cm, stout; umbel 2–4-flowered; peduncle 3 mm in diam., sparsely with 3 membranous sheaths, ca. 1 cm. floral bracts lanceolate, ca. 1 cm, apex acuminate. Pedicel and ovary ca. 2 cm. Flowers yellowish green; dorsal sepal ovate, cymbiform, slightly constricted in the middle, ca. 15 × 6 mm, 5-veined, margins fimbriate, apex caudate, with 3–6 fringes, narrowly oblong, ca. 3 mm; lateral sepals lanceolate, ca. 5 cm, apex short caudate, twisted near base, upper edges connate forming a synsepal ca. 2 cm wide; petals ovate-triangular, ca. 10 × 4 mm, 3-veined, margins with many fringes, narrowly oblong, ca. 3–4 mm; lip ligulate-elliptic, ca. 1 cm, conduplicate in basal half, apex obtuse, base attached to end of column foot by a mobile joint, margins and adaxial surface densely fimbriate-hairy, ca. 1 mm. Column ca. 5 mm, with semilunar wings; foot ca. 8–10 mm, with free part ca. 3 mm; rostellum 2, acicular, slightly curved, ca. 1 mm. Anther cap apex semilunar, not retuse.

Distribution and Habitat: — Bulbophyllum yingjiangense is currently known only from Yingjiang, western Yunnan Province, China. It grows on tree trunks in montane forest at 1400–1700 m. It flowers from October to November.

Etymology: —The specific epithet is derived from the name of Yingjiang County, which is the type locality of this species.

Figures

FIGURE 2. Illustration of Bulbophyllum yingjiangense B.M.Wang & J.W.Zhai.A. Flowering plant. B. Longitudinal section of flower. C. Dorsal sepal. D. Petal. E. Column with labellum. F. Labellum. G. Pollinium. H. Lateral sepal.

FIGURE 3. Bulbophyllum yingjiangense B.M.Wang & J.W.Zhai. A. Holotype. B. Pseudobulb with four ridges. C. Flower. D. Anatomy of the flower. E. Pollinium.