Any of several vines of the genus Cynanchum, especially C. nigrum, native to Europe, having clusters of small brownish-purple flowers.
白屈菜，黑白前：一种白前属的藤本植物，尤指产于欧洲的黑白前，具有褐紫色小花簇。
2
The tomatillo is covered with a thin membrane, or calyx, that is a brownish orange color with purple veins.
树蕃茄或花苞是用一个稀薄的膜被盖，那是一种褐色橙色颜色与紫色静脉。
3
North American annual widely cultivated for its yellow flowers with purple-red to brownish centers; in some classifications placed in a subgenus Calliopsis.