光叶山姜 guang ye shan jiang

Alpinia hokutensis Hayata; A. kelungensis Hayata; A. kumatake Makino; Languas hokutensis (Hayata) Sasaki; L. intermedia (Gagnepain) Sasaki; L. kelungensis (Hayata) Sasaki.

Pseudostems ca. 1 m. Ligule 5--6 mm, dry membranous, margin ciliate; petiole to 2.5 cm; leaf blade oblong or lanceolate, 20--50 × 5--12 cm, glabrous, base attenuate, apex acuminate. Panicles erect or pendent, 10--15 × 2--4 cm, glabrous; branches 0.8--1.3 cm, apically 3--5-flowered; bracteoles oblong, 7--10 mm, deciduous. Flowers white, glabrous. Calyx tubular, 3.5--4.5 mm, apex crenate. Corolla tube shorter than calyx; lobes narrow. Lateral staminodes horn-shaped. Labellum ovate, ca. 1.8 cm, base attenuate, apex acute, 2-cleft. Anther ovate, slightly hairy. Fl. Jun. 2 n = 48*.

Forest floors, scrub; 300--1000 m. Guangdong, Taiwan [Japan, Philippines].