鳞茎砖子苗 lin jing zhuan zi miao

Mariscus dregeanus Kunth; M. dubius (Rottbøll) Kükenthal.

Perennials. Rhizomes short. Culms densely tufted, 15-30 cm tall, slender, compressed triquetrous, longitudinally sulcate, base swollen into a bulb shape and clothed with many brown rudimentary leaf sheaths. Leaves shorter than to subequaling culm; sheath brownish membranous; leaf blade 2-4 mm wide, flaccid, flat. Involucral bracts 3-5, leaflike, longer than inflorescence, pendent after anthesis. Inflorescences capitate, subglobose, 8-16 × 5-12 mm, with 1-3 spikes. Spikes dense, with many spikelets. Spikelets ovoid to narrowly ovoid, 3-4 × 1.2-2 mm, slightly turgid, 3-5-flowered; rachilla broadly winged. Glumes pale to greenish on both surfaces but middle green, densely arranged, broadly ovate, ca. 2.5 mm, densely brown punctate, 15-17-veined. Stamens (2 or)3; anthers linear-oblong, ca. 0.5 mm; connective prominent beyond anthers. Style of medium length. Nutlet dark grayish brown, obovoid to ellipsoid, ca. 1.5 × 1 mm, 3-sided, densely punctate. Fl. and fr. Sep-Nov. 2n = 112.

Sandy areas at seashores; near sea level. Hainan [India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Sri Lanka, Thailand, Vietnam; tropical Africa, SW Asia (Yemen), Indian Ocean islands, Madagascar, Pacific islands].

Cyperus dubius is naturalized in SE Australia.