Rhynchostylis gigantea (Lindley) Ridley, J. Linn. Soc., Bot. 32: 356. 1896.海南钻喙兰 hai nan zuan hui lan

Saccolabium giganteum Lindley, Gen. Sp. Orchid. Pl. 221. 1833; Anota densiflora (Lindley) Schlechter; A. gigantea (Lindley) Fukuyama; A. hainanensis (Rolfe) Schlechter; Gastrochilus giganteus (Lindley) Kuntze; Vanda densiflora Lindley; V. hainanensis Rolfe.

Stems erect, 4-13 cm or longer, stout, ca. 2 cm in diam., many leaved. Leaves broadly lorate, 20-40 cm, fleshy, with amplexicaul sheaths at base, apex obtuse and unequally bilobed. Inflorescences 2-4, usually arching, 14-30 cm, densely many flowered; rachis 10-20 cm, thick; floral bracts often reflexed, broadly ovate, ca. 5 mm. Flowers thickly textured, white spotted with purplish red, lip deep purplish red, column purplish red, anther cap white. Sepals similar, elliptic-oblong, 12-17 × 9-10 mm, obtuse. Petals oblong, smaller than sepals, base contracted, apex obtuse; lip subobovate, ca. 17 × 12 mm, fleshy, base with a pair of ridges, margin 3-lobed; lateral lobes erect, subelliptic; mid-lobe very small, retuse; disk slightly papillate; spur narrowly conic, ca. 5 mm, inside densely white hairy. Column ca. 4 mm, thick, foot very short or indistinct; rostellum suborbicular; stipe linear, ca. 2 mm, apex ± dilated; viscidium lanceolate. Capsule obovoid, ca. 4 cm. Fl. Jan-Apr, fr. Feb-May. 2n = 38.

Epiphytic on tree trunks in open forests; ca. 1000 m. Hainan [Cambodia, Indonesia, Laos, Malaysia, Myanmar, Singapore, Thailand, Vietnam].