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

10. Alpinia dolichocephala Hayata, Icon. Pl. Formosan. 9: 119. 1920.

紫纹山姜 zi wen shan jiang

Languas dolichocephala (Hayata) Sasaki.

Pseudostems to 2 m. Leaves subsessile; ligule yellow, purple striped abaxially, entire or nearly 2-cleft, villous; leaf blade lanceolate, 70--90 × 10--12 cm, glabrous except shortly hirsute at margin, base abruptly attenuate, apex with caudate tip ca. 1 cm. Spikes ca. 15 cm, 20--30 cm in fruit, dark yellow sericeous-villous; bracteoles ca. 3 cm, nearly hard and brittle, base and margin hirsute, apex subrounded with hairlike arista 1--2 mm. Pedicel absent. Calyx subcylindric, ca. 2 cm, split on 1 side, abaxially very shortly hirsute. Corolla tube ca. 1 cm; lobes ca. 2 cm, central one hooklike, distal margin hirsute, apex mucronate. Lateral staminodes absent. Labellum white, purple striped toward center, broadly ovate, ca. 4 × 4 cm, margin erose, apex 2-cleft. Filament glabrous; anther ca. 1 cm. Ovary subglobose, ca. 2 mm in diam. Capsule globose, ca. 1.5 cm in diam., shortly hirsute. Fl. Apr.

* Forests; 400--700 m. Taiwan.


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