宽丝豆蔻 kuan si dou kou

Paramomum petaloideum S. Q. Tong, Acta Bot. Yunnan. 7: 310. 1985.

Plants 1--1.5 m tall, base with red sheaths. Leaf sheath longitudinally striate; ligule oblong, ca. 1 cm, apex emarginate; petiole 2--9 cm; leaf blade abaxially green, adaxially purple-red or light green, elliptic or lanceolate, 40--60 × 9--14 cm, glabrous, base cuneate or narrowly so, apex acuminate or shortly so. Spikes with 5--6 cm long peduncle, scalelike sheaths red with yellow-green margin; bracts ovate-orbicular, 3.4--3.6 × 3--3.2 cm; bracteoles red, tubular, ca. 2.2 cm, apex 3-toothed. Corolla tube equaling calyx, densely white pubescent; lobes narrowly elliptic, 1.4--1.5 cm × 4--8 mm. Lateral staminodes absent. Labellum yellow at apex, obovate, margin crisped. Filament red at base, bright red at middle, orange distally, broad, apex acuminate; anther attached to middle of filament. Ovary pale red, 3-loculed. Style white, linear. Stylodes clavate. Capsule red, hemispheric, 1.9--2 cm in diam., apex prolonged into wings, with persistent calyx. Seeds black, arillate. Fl. May--Jun.

* Forests; 500--600 m. S Yunnan (Mengla Xian).