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FOC | Family List | FOC Vol. 23 | Cyperaceae | Eleocharis

14. Eleocharis pellucida J. Presl & C. Presl, Reliq. Haenk. 1: 196. 1828.

透明鳞荸荠 tou ming lin bi qi

Annual or short-lived perennials. Rhizomes absent. Culms tufted to densely tufted, 5-30 cm tall or more, 0.5-1 mm thick, soft, longitudinally sulcate. Leaf sheaths 2, basally ± purplish and apically green, tubular, 1.5-4 cm, mouth truncate, apex deltoid dentate. Spikelet narrowly ovoid, oblong-ovoid, cylindric, or rarely globose-ovoid, (3-)5-10 × 1.5-3 mm, several to many flowered. Basalmost glume empty, amplexicaul for whole spikelet base; fertile glumes pale rust-colored, ± laxly spirally imbricate, oblong to suboblong, ca. 2 × 1 mm, midvein greenish, margin hyaline, apex obtuse to rounded. Perianth bristles 6, rust-colored, ca. 1.5 × as long as nutlet or slightly shorter, densely or laxly retrorsely spinulose. Stigmas 3. Nutlet yellowish to olivaceous, obovoid, 0.8-1.2 × 0.5-0.7 mm, 3-sided, sides convex, narrowly costate on angles; persistent style base pyramidal to conic, 1/4-1/2 as long and ca. 1/2 as wide as nutlet, sometimes spongy-thickened, apex acuminate. Fl. and fr. Mar-Nov.

Pond margins, shallow ponds, paddy fields, shallow water margins, lake banks; 200-1700 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shanxi, Sichuan, Yunnan, Zhejiang [India, Indonesia, Japan, Korea, Malaysia, Myanmar, Philippines, Russia (Far East), Sri Lanka, N Thailand].

1 Spikelet narrowly ovoid, oblong-ovoid, or rarely globose-ovoid, (3-)5-8 mm   (2)
+ Spikelet cylindric or globose-ovoid, 8-10 mm or ca. 3 mm   (3)
2 (1) Perianth bristles ca. 1.5 × as long as nutlet, densely retrorsely spinulose; nutlet ca. 1.2 mm.   14a var. pellucida
+ Perianth bristles shorter than nutlet, laxly retrorsely spinulose; nutlet. 8-0.9 mm.   14b var. japonica
3 (1) Spikelet cylindric, 8-10 mm; nutlet ca. 0.5 mm wide; persistent style base conic, ca. 1/2 as long as nutlet, not spongy-thickened.   14c var. sanguinolenta
+ Spikelet globose-ovoid, ca. 3 mm; nutlet ca. 0.7 mm wide; persistent style base pyramidal, ca. 1/3 as long as nutlet, spongy-thickened.   14d var. spongiosa

Lower Taxa


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