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FOC | Family List | FOC Vol. 24 | Zingiberaceae | Alpinia

21. Alpinia emaculata S. Q. Tong, Acta Phytotax. Sin. 27: 285. 1989.

无斑山姜 wu ban shan jiang

Pseudostems 1.5--2.5 m. Leaf sheath finely striate; ligule entire, 1--2 cm, leathery, pubescent, soon glabrescent; petiole 2.5--4 cm; leaf blade elliptic-lanceolate or oblong-lanceolate, 40--80 × 10--18 cm, adaxially glabrous, abaxially pubescent, base cuneate, margin densely ciliate, apex shortly acuminate. Racemes 15--25 cm; rachis densely brown hispid; bracteoles red-brown, 3--4 cm, slightly hairy, soon glabrescent, apex rounded toothed, ciliate. Pedicel 2--4 mm. Calyx pale red, tubular, ca. 2.2 cm, white pubescent, apex 3-toothed. Corolla tube ca. 1.5 cm, slightly white hairy; lobes white, central one suborbicular, 3.2--3.5 × 3--3.3 cm, lateral ones narrowly elliptic. Lateral staminodes pale red, subulate, ca. 1 cm. Labellum red with yellow center and margin, broadly ovate, ca. 4 × 6 cm, apex abruptly convex, entire. Stamen ca. 2.8 cm; filament white pubescent at base. Ovary yellow-green, densely brown villous. Capsule brownish, globose, ca. 3.4 cm in diam., apex with persistent calyx. Fr. Mar.

* Forests; ca. 800 m. S Yunnan.


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