a type of deciduous plant (= one that loses its leaves in autumn and grows new ones in the spring) that has large leaves and tall stems with purple and white flowers

Bear's breeches is a tall perennial with enormous prickly white and purple spikes in late summer. 熊马裤是一种高大的多年生植物，在夏末长着巨大的白色和紫色尖刺。

Here can be found the towering flower spikes of acanthus, commonly known as bear's britches. 在这里可以找到高耸的刺槐花穗，俗称熊马裤。