三奈

Zingiber koshunensis Hayata ex Moo in T. L. Wu et al., Novon 10: 89. 2000. syn. nov. Zingiber koshunensis Hayata ex Moo, Fl. Taiwan 5: 850. 1978. nom. inval. Zingiber pleiostachyum K. Schumann in Engler, Pflanzenr. 20 (IV 46): 185. 1904; Wu & Chen, Fl. Reipubl. Popul. Sin. 16(2): 144. 1981.

Rhizome creeping, slender, subterete, 1 cm in diameter. Pseudostem 30-60 cm. leaf-blade oblong or oblong-lanceolate, 15-30 × 4-8 cm, base obtuse, apex acuminate, thinly pubescent to almost glabrous on both surfaces, petiole short; ligule bilobed, auriculate, membranous. Inflorescence 1-3 on separate peduncle arising from rhizome, many-flowered, 4-5 cm. Peduncle 2-10 cm. Bracts lanceolate, 2 cm. base sheath-like. Calyx tubular, 1 cm, apex 3-toothed, base hirsute. Corolla tube slender, 2-3 cm; lobes red to purple, 2 cm, the dorsal one up to 1 cm wide, concave, slightly broader than the others. Labellum variable, obovate to subrhombic, 22 × 20 mm, 3-lobed, central lobe obovate-oblong, 1.0-1.5 cm, apex round to emarginate, red to deep violet, lateral lobes smaller, apex and margin violet, base yellowish. Anther linear, subcylindric, 1 cm, connective appendix linear, 1 cm, curved. Ovary hirsute. Capsules oblong, triangular, with persistent bracts and bracteole, dehiscent loculicidally, pericarp fleshy, orange-red to purple red inside. Seeds black or dark brown, aril white, sac-like.

TAIPEI: Sanhsia Town, Shu-mei Liu 597 (TNU, HAST); Shihting, Shu-chuan Liu 975 (TNU); same loc., Shown-ling Huang 018 (TNU); some loc., H. W. Lin 104 (TNU); some loc., J. C. Wang 10216 (TNU); Hsiaoketou, Shown-ling Huang 017 (TNU); Hsiaoketou, Shown-ling Huang 011 (TNU); Wulai Hsiang, Ya-chi Chen 060 (TNU); same loc.,Chia-long Huang 078(TNU); same loc.,Y. C. Lu 397 (TNU); Hsintien, Ho-ming Chang 4561 (TNU). Nantou Hsien: Shitou, Shown-ling Huang 008 (TNU); Luku Hsiang, Shu-miao Kuo 068 (TNU). CHIAYI: Feng-shan to Ta-tien-yu waterfall, Wang et al. 9491(TNU). TAINAN: Kantoushan, Liao et al. 1745. KAOHSIUNG: Maolin, Chuan-chieh Chen 597 (TNU); Terng-Jy, J. C. Wang 7528 (TNU); Shyr-shan logging tract , J. C. Wang 7596 (TNU). PINGTUNG: Nanjenshan, Shu-miaw Chaw 824 (TNU, HAST); same loc., Shown-ling Huang 012 (TNU); Wutai Hsiang, Ali to Hsiaokueihu, Chii-cheng Liao 636 (TNU); Taiwu Hsiang, Shu-chuan 122 (TNU). TAITUNG: Tahanshan to Amentotaxus nature preserve, Wang et al. 8806(TNU).

Endemic, widely distributed at low to middle altitudes throughout the island, often in thicket of broad-leaved forest.