Selaginellaceae
General description:
Lesser Clubmosses share these features:
They have creeping, dichotomously branching stems.
Simple scalelike leaves.
Roots arise from the stems.
They reproduce by means of spores borne in sporangia at the bases of leaves.
For a labeled diagram click this link:
https://www.google.com/search?q=selaginella&client=safari&rls=en&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiuiPOyl7vXAhXIoaQKHYQrCKgQ_AUICigB&biw=1317&bih=571#imgrc=r1TnE1yVYmh3uM: