Any of several Old World plants of the genus Ononis, having woody stems, axillary pink or purplish flowers, and trifoliate leaves with dentate leaflets.
一种芒柄花属的东半球植物，具有木质茎，腋生的粉红或略呈紫色的花，及具有齿状小叶的三层复叶。
Leaves alternate, petiolate, thinly leathery or papery, margin dentate in apical half , rarely entire, lateral veins 2 or 3 pairs, lowest triplinerved.
叶互生，具叶柄，薄革质或纸质，上半部边缘具牙齿，很少全缘，侧脉2或3对，低的离基三出脉。
A new criterion to decide whether the carboxy group coordinating to the metallic ion in mono or bi dentate-fashion in an ambiguous situation, base on coordination bond distances and angles.
通过上述晶体结构中配位键长键角的分析，得到了一个行之有效的标准，判断羧基与中心金属离子是单齿配位还是螯合配位。
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