这些植物，开有圆形的白色花簇，如欧洲荚莲和齿叶荚莲的某几个品种。
These plants have rounded clusters of white flowers, as the guelder rose and certain species of the arrowwood.
然而剑齿龟生活的年代还没有草生长，因而食物来源可能是二叠纪植物群的茎或叶。
Grasses did not exist at that time but it may have fed on stems or leaves of Permian flora.
一种一年生的欧洲藜，叶具粗疏齿牙；已广泛分布于美国和加拿大南部。
European annual with coarsely dentate leaves; widespread in United States and southern Canada.
应用推荐