Only vessels were observed in Selaginella sanguinolenta and Selaginella pulvinata, including two types of scalariform perforation plates and reticulate-scalariform perforation plates.
英
美
- 圆枝卷柏、垫状卷柏仅观察到导管,有梯状穿孔以及网状-梯状混合型穿孔2种类型。