All Floras      Advanced Search
Login | eFloras Home | Help
Dinghushan | Family List | Cyperaceae | Eleocharis

Eleocharis tetraquetra Nees

龙师草

Description from Flora of China

Perennials. Stolons short or absent. Culms tufted, 25-90(-100) cm tall, ca. 1 mm thick, sharply 4-angled, glabrous. Leaf sheaths 2 or 3, tubular, 7-10 cm, basally purplish red, apically grayish green, mouth truncate, apex shortly triangular and mucronate. Spikelet brownish green, oblong-ovoid, ± narrowly ovoid, or oblong, 7-20 cm × 3-5 mm, slightly oblique, many flowered, apex obtuse to acute. Basal 3 glumes empty; basalmost glume amplexicaul for whole spikelet base; fertile glumes green at middle and pale rust-colored on sides, tightly imbricate, oblong and boat-shaped, 3-4 × 1-1.5 mm, papery, margin narrowly hyaline, apex obtuse. Perianth bristles 6, reddish to brownish, as long as nutlet (including style base), laxly to densely retrorsely spinulose. Stigmas 3. Nutlet pale brown when mature, with a short thick stipe, obovoid to broadly obovoid, ca. 1.2 × 1.5 mm, compressed 3-sided; persistent style base laterally compressed, deltoid, 1/2-2/3 as long and ca. 3/4 as wide as nutlet, surface sometimes mammillate, apex acuminate. Fl. and fr. Sep-Nov.

Pond and ditch margins, riverbanks; 100-1900 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Heilongjiang, Henan, Hunan, Jiangsu Jiangxi, Liaoning, Sichuan, Taiwan, Yunnan, Zhejiang [Afghanistan, Bhutan, India, Indonesia, Japan, Nepal, Pakistan, Papua New Guinea, Philippines, Russia (Far East), Sri Lanka, Thailand, Vietnam; N Australia].

生活型: 草本

栽培植物: 野生

特征: 直立簇生草本;

花期: 9--11

果期: 9--11

生境: 生于荒地或沟旁湿处

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 单子叶植物纲


 

Related Objects  

Flora of China  
  • Illustration
  • Illustration
    Flora of Pakistan  
  • Illustration
  • Illustration

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |