Identify the plant bodies,which are commonly named as 'cryptogamae'. State and explain two characteristics,which are exhibited by each category of these plant bodies.

(N/A) The plant groups collectively known as 'cryptogamae' are Thallophyta,Bryophyta,and Pteridophyta.
$1$. Thallophyta: These plants have a simple,undifferentiated body structure (thallus) and lack specialized vascular tissues (xylem and phloem).
$2$. Bryophyta: These are known as amphibians of the plant kingdom; they possess a thalloid or leafy body and require water for fertilization.
$3$. Pteridophyta: These are the first terrestrial plants to possess vascular tissues (xylem and phloem) and have a well-differentiated plant body into roots,stems,and leaves.