All Floras      Advanced Search
Login | eFloras Home | Help
Dinghushan | Family List | Onagraceae | Ludwigia

Ludwigia perennis L.


Description from Flora of China

Jussiaea caryophyllea Lamarck; J. perennis (Linnaeus) Brenan; Ludwigia caryophyllea (Lamarck) Merrill & F. P. Metcalf; L. parviflora Roxburgh.

Herbs erect, annual, with taproot. Stems 20-100 cm tall, branched, subglabrous or minutely puberulous on younger parts. Petiole 2-15 mm, winged; leaf blade narrowly elliptic to lanceolate, 1-11 × 0.3-2.7 cm, lateral veins 6-12 per side, submarginal vein inconspicuous, base narrowly cuneate, apex subacute. Sepals 4, rarely 5, deltate, (1.3-)2-3.5 mm, glabrous or minutely puberulous. Petals yellow, elliptic, 1-3 × 0.7-2 mm. Stamens as many as sepals, or rarely more; filaments 0.3-0.7 mm; anthers 0.5-0.7 mm; pollen in tetrads. Style 0.7-1.5 mm; stigma globose. Capsule often nodding, pale brown, oblanceoloid, terete, 3-16(-19) mm, 2.5-5 mm in diam., thinly walled, readily and irregularly loculicidal, glabrous or puberulous, sessile or pedicel to 6 mm. Seeds in 2 or more rows per locule, free, brown with fine brown lines, 0.3-0.5 mm, raphe very narrow and inconspicuous. Fl. and fr. Jul-Nov. 2n = 16.

Wet sites such as flood plains, roadside ditches, muddy wallows, abandoned rice paddies; near sea level to 1200 m. Fujian, Guangdong, Guangxi, Hainan, Jiangxi, Taiwan, Yunnan [Bangladesh, Bhutan, India, Indonesia, Japan, Myanmar, Nepal, Philippines, Sri Lanka; Africa (including Madagascar), SE and SW Asia, Australia, Pacific islands (New Caledonia)].

生活型: 草本

栽培植物: 野生

特征: 一年生草本;茎叶无毛,与草龙近似,但本种的叶较小,狭披针形,雄蕊1轮,果也较短,仅长5--8厘米

果期: 7

生境: 生于田边

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲


Related Objects  

Flora of China  
  • Illustration
  • Illustration
    Flora of Pakistan  
  • Illustration (S. Hameed)
  • Illustration

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