Taxonomic revision of Zingiber (Zingiberaceae) of Taiwan Author Lin, Yuan-Chien Department of Forestry, National Chung Hsing University, No. 145, Xinda Rd., Taichung City 402, Taiwan. School of Life Science, National Taiwan Normal University, No. 88, Tingchou Rd. Section 4, Wenshan Dist., Taipei City 116, Taiwan. Taiwan Forestry Research Institute, No. 53, Nanhai Rd., Zhongzheng Dist., Taipei City, 10066, Taiwan. yclinmiao@gmail.com Author Chao, Chien-Ti ff8bahamut@gmail.com Author Chang, Chih-Yi Department of Forestry, National Chung Hsing University, No. 145, Xinda Rd., Taichung City 402, Taiwan. School of Life Science, National Taiwan Normal University, No. 88, Tingchou Rd. Section 4, Wenshan Dist., Taipei City 116, Taiwan. Taiwan Forestry Research Institute, No. 53, Nanhai Rd., Zhongzheng Dist., Taipei City, 10066, Taiwan. a80510@gmail.com Author Tseng, Yen-Hsueh Department of Forestry, National Chung Hsing University, No. 145, Xinda Rd., Taichung City 402, Taiwan. School of Life Science, National Taiwan Normal University, No. 88, Tingchou Rd. Section 4, Wenshan Dist., Taipei City 116, Taiwan. Taiwan Forestry Research Institute, No. 53, Nanhai Rd., Zhongzheng Dist., Taipei City, 10066, Taiwan. tseng2005@nchu.edu.tw text European Journal of Taxonomy 2022 2022-09-28 839 74 102 journal article 152798 10.5852/ejt.2022.839.1933 f367315a-42a4-4116-808b-60c3a909f5e3 2118-9773 7119107 Zingiber mioga (Thunb.) Roscoe urn:lsid:ipni.org:names:798364-1 Fig. 10 Transactions of the Linnean Society of London 8: 348 ( Roscoe 1807 ) . Basionym Amomum mioga Thunberg , Systema Vegetabilium: secundum classes ordines genera species cum characteribus et differentiis. Editio decima quarta : 51 ( Thunberg 1784 ). Material examined TAIWAN – Ilan County • Yingzi Ling roadside ; Y.C. Lin 1339 ; TCF • ibid.; Y.C. Lin 1366 ; TCF • Mt. Yingtzuting ; T.C. Hsu 9667 ; TAIF • Yingtzuling ; C.T. Chao 4644 ; TAIF . Description Perennial rhizomatous herb, 60–80 cm tall. Rhizomes fleshy, weakly aromatic, compacted, branched, 0.9–2.9 cm in diameter, brown externally, light yellow internally; root tubers terete, distant from the rhizomes, ca 3.0× 1.5 cm , brownish externally. Leafy shoots forming dense clumps, spreading, each shoot comprising13–16 well-developed leaves at flowering. Leaves deciduous, simple, distichous; ligules ca 3 mm long, bilobed, membranaceous, pale green, auriculate; petiole 8–11 mm long, connate a pulvinus; lamina elliptic, 13–29 × 4–7 cm , length / width ratio 3.3–5.6, adaxially green, glabrous, abaxially pale green, pubescent along the midrib, base cuneate, apex acuminate, margin entire, conspicuously undulate, chartaceous. Inflorescences 2–4 per plant, arising from rhizomes; peduncles 1.5–2.4 cm long, ascending, glabrous; spike ellipsoid, ca 4.2–8.2 × 1.6–3.7 cm , each with 3–7 flowers; fertile bracts greenish-yellow, narrowly ovate, 3.5–4.1 × 0.6–0.8 cm , involute on both sides, apex acute to attenuate, glabrous externally and internally; bracteole narrowly ovate, 1.7–2.5 × 0.6–1.5 cm , translucent greenish, apex acute, involute on both sides, glabrous externally and internally. Flowers 6–8 cm long, much exserted beyond the bracts; calyx tubular, membranaceous, ca 6 mm long, with unilateral incision, translucent. Corolla tube slender, ca 2.5 cm long, yellowish-white, glabrous externally and internally; dorsal corolla lobe narrowly ovate, ca 2.7 × 1.1 cm , yellow, translucent, apex acuminate, glabrous; lateral corolla lobes narrowly ovate, ca 2.2 × 0.7 cm , yellowish, translucent, apex acuminate, glabrous; labellum widely obovate, ca 2.8 × 2.0 cm, yellowish, apex retuse or entire, glabrous; lateral staminodes narrowly oblong, ca 1.6 × 0.5 cm , connate to labellum at ca basal ⅓, yellow, apices obtuse, glabrous. Stamen one; filament ca 2 mm , glabrous; anther connective tissue yellow, elongate appendage wrapped around style; anther thecae two, ca 1.1 cm long, longitudinal dehiscence, pollen light yellow; anther crest beak-shaped, ca 10 mm long when stretched, yellow, apex entire. Style filiform, white, ca 5.6 cm long, extending to the end of anther crest; stigma, white, ciliate. Ovary cylindrical, trilocular, ca 0.6 × 0.3 cm , yellow, pubescent; epigynous glands two, narrowly conical, ca 6 mm long, pale yellow, apices sharp. Capsule ovate, dehiscence loculicidal, ca 2.9 × 1.5 cm , usually shorter than persistent bract, pericarp yellow and orange-red inside. Seed ellipsoid, ca 0.4 × 0.3 cm , enveloped by the aril. Aril white, enveloping ¾ of the length of the seeds. Fig. 10. Zingiber mioga Thunb., Yingzi Ling roadside. A . Habit. B . Leaf adaxial (left) and abaxial (right) surface. C . Ligule. D . Rhizome. E . Inflorescence. F . Flower. G . Bracts. H . Calyx tube. I . Corolla lobes. J . Labellum. K . Stamen and pistil. L . Ovary. M . Fruit. N . Seeds. Photos:A = C.T. Chao; B–N = L.P. Hsu. Phenology Flowering from July to September. Fruiting from September to October. Distribution Distributed in China , Japan , and Korea . In Taiwan , this species was naturalized in Ilan County (see Discussion). Conservation Status This species is evaluated as data-deficient (DD) here, due to its uncertain taxonomic status.