1.Young stems terete to frequently 4-angled or subalate, glabrous, puberulous, pubescent, or tomentose, often glabrescent.
嫩茎圆柱状到经常地四棱形或略似翼,无,微柔,短柔,或,通常后脱落。
2.Fruit indehiscent or tardily dehiscent, often lomentaceous siliques, breaking transversely into 1(or 2)-seeded units, linear or oblong, terete, sessile;