《云南植物志》|| 千屈菜科 Lythraceae ||节节菜属 Rotala Linn. ||细萼节节菜 Rotala rosea (Poir.) C. D. K. Cook. ex Hara

5.细萼节节菜
Rotala rosea (Poir.) C. D. K. Cook. ex Hara (1979).
R. letopetala Koehne (1880); Ammannia rosea Poir. (1810); A. leptopetala Blume (1852).
一年生草本，高8—40厘米，茎四棱，有分枝。叶对生，无柄，线形或长方形，稀线状披针形，茎上叶长4—32毫米，宽1—9毫米，分枝上的叶更小，基部近楔形。花小，红色或紫色，膜质，无梗，多数单生于叶腋内；花瓣通常5片，稀4数，长椭圆形或狭长方形，顶端渐尖；小苞片2枚，线形，稍短于萼筒或超过萼筒；花期萼筒钟形，长约1毫米，果期半球形，膜质，附属体5枚，与萼裂片等长或长于裂片，有的附属体部分不明显；花柱极短，与柱头几等长或比柱头稍长一些。蒴果超过萼筒，长约1.5毫米，多数3瓣裂，稀2裂；种子极小，球形。
产麻栗坡，砚山，洱源，中甸等地，生于海拔1000—1800米湖湿处及稻田中。分布于我国南部。印度、泰国、越南、菲律宾至印度尼西亚也有。云南新记录。

《Flora of China》|| Lythraceae || Rotala ||五蕊节节菜 Rotala rosea

8. Rotala rosea (Poiret) C. D. K. Cook ex H. Hara, Enum. Fl. Pl. Nepal. 2: 173. 1979.

五蕊节节菜 wu rui jie jie cai

Ammannia rosea Poiret, Encycl., Suppl. 1: 329. 1810; A. leptopetala Blume; A. littorea Miquel; A. pentandra Roxburgh; Rotala leptopetala (Blume) Koehne; R. littorea (Miquel) Nakai; R. pentandra (Roxburgh) Blatter & Hallberg.

Herbs, annual, terrestrial or amphibious, 8-30 cm. Stems ascending or erect, mostly unbranched. Leaves decussate, linear-lanceolate to lanceolate-oblong, 7-30 × 3-5 mm, base obtuse [to cuneate], apex obtuse to retuse. Bracts similar to foliage leaves, longer than flowers. Flowers 5-merous, solitary, sessile, axillary on main stem and branches; bracteoles linear, slightly shorter than floral tube. Floral tube campanulate, 1-1.5 mm; sepals (4 or)5, very short, ca. 0.25 mm, apex acuminate; epicalyx segments setiform, equaling sepals. Petals (absent to)5, ca. 0.25 mm, not persistent. Stamens 5; anthers reaching margin of floral tube. Ovary globose; shorter than ovary. Capsules globose, ca. 2 mm in diam., well exserted from floral tube, apex red, 3-valved. Seeds ca. 0.3 mm. Fl. and fr. Aug-Oct in temperate regions, throughout year in tropical regions.

Paddy fields, wet places; lowlands. Fujian, Guangxi, Guizhou, Hainan, Jiangsu, Yunnan; naturalized in Taiwan (Nantou) [Bangladesh, Indonesia, Myanmar, Malaysia, Philippines, Thailand, Vietnam].