Talk in general about bryophytes.

Transitional between green algae and vascular plants. First embryophytes or archegonaites, gradually adapted to terrestrial environment. Chlorophyll cromophytes, they have an erect stalk or cromus, provided with lateral appendages. epidermis is deprived of stomata (pores with some exceptions). Perforations or pores allow gas exchange between atmosphere and internal tissuesof the plant. No roots, but rhizoids which attach to substrate and partially water uptake. Small plants cryptogams and no real tissues or vessels