白花凤蝶兰（植物分类学报）
Papilionanthe biswasiana (Ghose et Mukerjee) Garay in Bot. Mus. Leafl. Harvard Univ. 23 (10): 369. 1974; Seidenf. in Opera Bot. 95: 233, fig. 144. 1988; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 295. 1995; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 108, pl. 240. 1997. ——Aerides biswasiana Ghose et Muherjee in Orch. Rev. 58: 124. 1945.
Epiphytic on tree trunks in forests; 1700-1900 m. S Yunnan [Myanmar, Thailand].
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Stems erect or pendulous, terete, to 50 cm or longer, stout, 5-7 mm in diam., often unbranched, internodes 3-4 cm. Leaves well spaced, terete, 13-16 cm × 3-4 mm, fleshy, abruptly contracted at apex and aristate. |
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Inflorescence often slightly shorter than leaves, 1-3-flowered; peduncle with 2 or 3 short sheaths; floral bracts broadly ovate-triangular, 3-4 mm, slightly fleshy. Flowers opening widely, creamy white, sometimes tinged pale pink, large, thinly textured; pedicel and ovary ca. 3 cm. Sepals similar, obovate, ca. 2 × 1 cm, obtuse-rounded, lateral sepals adnate to column foot. Petals oblanceolate, ca. 1.8 × 1.5 cm, base contracted, margin ± erose, apex rounded; lip spurred, 3-lobed; lateral lobes erect, parallel to column, bilobed; proximal lobule linear, ca. 1.7 cm, attenuate toward apex; distal lobule ca. 2 mm, apex emarginate; mid-lobe spreading, subflabellate, ca. 1.4 cm, deeply bilobed, base with a claw ca. 5 mm, with 3 fleshy keels adaxially; spur cylindric, ca. 2.5 cm × 3 mm, narrowed toward tip, slightly hooked. Column ca. 1 × 0.7 cm. Fl. Apr.
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记载在《西藏植物志》第五卷 (1987) 中的本属植物 Aerides uniflora (Lindl.) Summerh. =Papilionanthe uniflora (Lindl.) Garay 十分相似本种。根据原始记载与本种的不同在于唇瓣侧裂片深2裂，裂片为2个钻状，中裂片先端浅2裂。
本属植物的西藏标本我们未见到花，有待今后进一步研究。