版纳姜 ban na jiang

Pseudostems 80--100 cm, base with red sheaths. Leaves sessile; ligule 2-lobed, 2--4 mm; leaf blade purplish red abaxially on basal leaves, elliptic or narrowly lanceolate, 28--50 × 10--15 cm, adaxially sparsely hairy along sides of midvein, abaxially densely pubescent, base subrounded or cuneate, apex caudate or acuminate. Inflorescences arising from rhizomes, red, ellipsoid or lanceolate, 3--9 × 3--4 cm; peduncle 4--13 cm; bracts ovate or elliptic, 4--4.5 × 3--3.3 cm; bracteoles pale with red apex, 2.4--2.6 cm × 5--6 mm. Calyx 1--1.5 cm, apex 2-toothed. Corolla pale with yellowish apex; tube 4--6 cm; lobes red, lanceolate, curved, central one 2.3--3 × 0.7--1.2 cm, lateral ones narrower. Labellum yellow; central lobe ligulelike, 2.1--2.5 cm × 6--7 mm, margin curved; lateral lobes auriculate, 1.3--1.5 cm × 7--8 mm. Anther ca. 1.4 cm; connective appendage yellow, ca. 1.4 cm. Ovary glabrous. Capsule obpyriform, 3.5--4.5 × 2--2.5 cm, 3-angled. Seeds oblong, ca. 5 mm. Fl. Jul.

* Forests; ca. 800 m. S Yunnan (Xishuangbanna Dai Zu Zizhizhou).