《中国植物志》|| 蓼科 POLYGONACEAE ||巴天酸亚属 Subgen. Rumex ||紫茎酸模 Rumex angulatus Rech.f.

7.紫茎酸模
Rumex angulatus Rech. f. in Candollea 12: 51. 1949;西藏植物志1: 603. 1983.
多年生草本。茎直立，高40-60厘米，具沟槽，紫红色。基生叶长圆状披针形，长15-20厘米，宽3-5厘米，顶端尖，基部楔形，叶柄长3-5厘米，茎生叶披针形，较小，具短柄；托叶鞘膜质，筒状，易破裂。花序圆锥状紧密，顶生，花序轴略呈之字形折曲。花两性，多花轮生；花梗细弱，丝状，中下部具关节，关节果时不明显；花被片6,成2轮，外花被片长圆形，长约1.5毫米；内花被片果时增大，圆心形，顶端圆钝，基部心形，长约5毫米，网脉明显，边缘近全缘或具不整齐的小圆齿，全部无小瘤。瘦果卵形，具3棱，长约3毫米，黄褐色，有光泽。花期6-7月，果期7-8月。
产西藏。生湖边、沟边湿地，海拔3000-4200米。巴基斯坦、克什米尔地区、阿富汗也有。

《Flora of China》|| Polygonaceae || Rumex ||紫茎酸模 Rumex angulatus

6. Rumex angulatus K. H. Rechinger, Candollea. 12: 51. 1949.

紫茎酸模 zi jing suan mo

Herbs perennial. Stems erect, purple-red, 40-60 cm tall, glabrous, grooved. Basal leaves: petiole 3-5 cm; leaf blade oblong-lanceolate, 15-20 × 3-5 cm, both surfaces glabrous, base cuneate, apex acute; cauline leaves shortly petiolate, lanceolate; ocrea fugacious, membranous. Inflorescence terminal, paniculate, dense; rachis slightly zigzagged. Flowers bisexual. Pedicel filiform, slender, articulate below middle. Inner tepals enlarged in fruit; valves orbicular-cordate, ca. 5 × 4 mm, all without tubercles, net veined, base cordate, margin nearly entire or irregularly minutely crenate, apex obtuse. Achenes yellow-brown, shiny, ovoid, trigonous, ca. 3 mm. Fl. Jun-Jul, fr. Jul-Aug.

Watersides, moist valleys; 3000-4200 m. Xizang [Afghanistan, Kashmir, Pakistan].