草豆蔻 cao dou kou

Alpinia henryi K. Schumann; A. henryi var. densihispida H. Dong & G. J. Xu; A. kainantensis Masamune; A. katsumadae Hayata; Languas henryi (K. Schumann) Merrill; L. katsumadae (Hayata) Merrill.

Pseudostems to 3 m. Ligule (3--)5--10 mm, abaxially hirsute; petiole absent to 2 cm; leaf blade linear-lanceolate, 20--65 × 2--12 cm, glabrous or rarely abaxially sparsely hirsute, base obliquely attenuate, margin hairy, apex acuminate, with spirally caudate mucro. Racemes erect, 10--30 cm, yellow hirsute; bracts 4--4.5 cm, glabrous; bracteoles milky white, broadly elliptic, 2--3.5 cm, hirsute at base and gradually becoming glabrous toward mucronate apex. Pedicel 2--4 mm. Calyx campanulate, 2--3 cm, split on 1 side, abaxially hairy, apex 2-toothed. Corolla tube 8--10 mm; lobes lanceolate, 2.5--3 cm, margin ciliate. Lateral staminodes subulate, ca. 3 mm. Labellum marked with radiate, purple stripes from center to margin, triangular-ovate, 3.5--4.5 cm, apex shallowly 2-cleft. Filament ca. 1.5 cm; anther 1.2--1.5 cm. Ovary hirsute, ca. 5 mm in diam. Capsule globose, 2--3 cm in diam., yellow hirsute. Fl. Apr--Jun, fr. May--Aug. 2 n = 48*.

Dense or sparse forests. Guangdong, Guangxi, Hainan [Vietnam].