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FOC | Family List | FOC Vol. 25 | Orchidaceae | Calanthe

27. Calanthe alismatifolia Lindley, Fol. Orchid. 6-7(Calanthe): 8. 1855.

泽泻虾脊兰 ze xie xia ji lan

Alismorkis alismatifolia (Lindley) Kuntze; A. japonica (Blume ex Miquel) Kuntze; Calanthe austrokiusiuensis Ohwi; C. fauriei Schlechter; C. furcata Bateman ex Lindley var. alismatifolia (Lindley) M. Hiroe; C. furcata f. fauriei (Schlechter) M. Hiroe; C. japonica Blume ex Miquel; C. nigropuncticulata Fukuyama.

Plants 20-45 cm tall. Rhizome inconspicuous. Pseudobulbs cylindric, 1-3 cm × 3-5 mm. Leaves 3-6, basal, well developed and spreading at anthesis, not deciduous; blade elliptic to ovate-elliptic, 10-23 × 4-12 cm, glabrous or abaxially sometimes with short hairs, apex acute; petiole-like base 6-20 cm, slender. Scapes 1 or 2, arising from leaf axils, erect, 10-28 cm, slender, densely puberulent; rachis 3-4 cm, subdensely to densely 3- to more than 10-flowered; floral bracts persistent, slightly recurved, broadly ovate-lanceolate, 5-10 mm, abaxially sparsely puberulent. Flowers white, sometimes tinged purplish violet; pedicel and ovary 10-20 mm, puberulent. Sepals similar, subobovate, ca. 10 × 6 mm, abaxially pilose, 5-veined. Petals subrhombic, ca. 8 × 4 mm, glabrous, 3-veined, apex obtuse; lip adnate to entire length of column wings, spreading, deeply 3-lobed; lateral lobes linear or narrowly oblong, ca. 8 × 2 mm, apex rounded; mid-lobe flabellate, ca. 17 × 12 mm, base clawed, apex subtruncate, divided by a deep sinus into 2 lobules; lobules subrhombic, much larger than lateral lobes, 5-6 mm wide, margin entire or erose, apex truncate-obtuse; disk with several yellow, wartlike calli at base; spur straight, cylindric, ca. 10 mm, slender, glabrous. Column ca. 3 mm, slightly dilated at apex, glabrous; rostellum 2-lobed; lobes ca. 1.2 mm; pollinia ovoid, subequal in size, ca. 2 mm. Capsule ca. 20 × 6 mm. Fl. Jun-Jul. 2n = 40, 44.

Evergreen broad-leaved forests; 700-2100 m. Guangxi, Guizhou, Hubei, Hunan, Sichuan, Taiwan, SE Xizang, SE and W Yunnan, Zhejiang [Bhutan, NE India, Japan, Vietnam].


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