polytrichia

例句：

1. 1. The plant is characterized by its polytrichia, which makes it look very different from other plants.
   这种植物以其多毛状的特征而与众不同。
2. 2.Polytrichia is a common feature of many terrestrial plants, providing them with protection against predators.
   多毛是许多陆地植物的常见特征，为它们提供了对捕食者的防护。
3. 3. In the field of botany, polytrichia refers to the study of plant morphology and taxonomy.
   在植物学领域，多毛是指研究植物形态和分类学。