ladies' tress.es 也作 lady's tresses

ladies-tresses的词性：
pl.n.(used with a sing. or pl. verb)（复数名词）（与单数或复数动词连用）

1. Any of various orchids of the genus Spiranthes, having a spike or raceme of small flowers usually arranged in a spiral.
绶草：任一种属于绶草属 的兰花，长有穗状和螺旋状的小总状花序