密花虾脊兰（中国高等植物图鉴）
竹叶根节兰（台湾植物志），
密花根节兰（台湾兰科植物彩色图志）
Calanthe densiflora Lindl., Gen. Sp. Orch. Pl. 250. 1833, et in Bot. Reg. 19: t. 1646. 1833; Rchb. f. in Walp. Ann. Bot. Syst. 6: 919. 1864; Hook. f., Fl. Brit. Ind. 5: 855. 1890; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 174. Pl. 236 (p. p.). 1898; Mitra, Fl. Pl. East. Ind. 1: 328. 1958; Masamune in J. Geobot. 19 (4): t. 173, 1971; 中国高等植物图鉴5: 718.图8266。1976; 海南植物志4: 235. 1977; 台湾植物志5: 908, 910.图1559. 1978; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 45. 1990, et Iden. Guide Vietnam. Orch. 107. 1994;台湾兰科植物彩色图志1: 180. 1996.——Calanthe kazuoi Yamamoto in Trans. Nat. Hist. Soc. Formos. 20: 38. 1930.
Broad-leaved and mixed forests, along streamsides and valleys; 1000-3000 m. Guangdong, Guangxi, Hainan, Sichuan, Taiwan, S and SE Xizang, NW and SE Yunnan [Bhutan, NE India, Vietnam]. This species is similar to Calanthe lyroglossa Rchb.f. and C. clavata Lindl. The difference between this species and the former is that the lateral lobes of the labial petals are obvious, the stamens are slender, and the pollen clusters are obovoid ; different from the latter, the inflorescence is short and spherical, and the two pleats on the lip plate are close to the base of the middle lobe and are cylindrical. |
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Plants 50-60 cm tall, with long creeping rhizome 3-4 mm in diam. Shoots spaced 5-6 cm apart along rhizome. Pseudobulbs small or inconspicuous, enclosed in basal sheaths of leaves. |
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Leaves usually 3, basal, well developed at anthesis, not deciduous; blade lanceolate or narrowly elliptic, 35-40 × 2.3-6.5 cm, glabrous, apex acute; petiole-like base ca. 10 cm, articulate, enclosed by tubular sheaths and forming a slender pseudostem 10-16 cm. |
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| Scapes 1 or 2, arising from rhizome, erect, ca. 20 cm, 3-4 mm in diam., with 3-5 tubular sheaths toward base; rachis short, densely many flowered; floral bracts caducous, narrowly lanceolate, 1.5-3 cm, glabrous. Flowers arranged in a dense head, pale yellow, turning black when dried; pedicel and ovary ca. 20 mm, glabrous. Sepals similar, oblong, 13-14 × ca. 5 mm, 3-5-veined, apex aristate. Petals subspatulate, 13-14 × ca. 4 mm, 3-veined, apex acute; lip adnate to base of column wings, ovate-orbicular, 7-11 × 5-11 mm, 3-lobed above middle; lateral lobes ovate-triangular, ca. 5 × 3 mm, ca. 10 mm across their apices, apex obtuse; mid-lobe subsquare, ca. 5 × 4 mm, apex emarginate; disk with 2 lamellae; lamellae deltoid, ca. 2 × 3 mm; spur straight, cylindric, 12-16 × ca. 3 mm, apex obtuse. Column ± arcuate, ca. 12 mm, slender, base dilated; rostellum broadly ovate-triangular, ca. 1.2 mm, unlobed; anther cap beaked; pollinia obovoid, subequal in size, ca. 1.2 mm, with short caudicles. |
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Capsule nearly pendulous, ellipsoid-globose, ca. 1.3 × 0.8 cm. Fl. Aug-Sep, fr. Oct. 2n = 40. | ||
