S ° 
. - ( 
Paleophytology. 421 
The former had a columnar unbranched stem, 20 metres in 
height, and rising from a square base 1 metre in diameter, 
Fic. 536.— Leaf-scars of Fic. 537.-—I. Fertile branch; II. 
Lepidodendron _ ele- F terminal branch of Lepzdoden- 
gans natural size). é : adron (reduced). 
Fic. 535.— Branching stem of Le/7dodendron, from the 
coal-beds of Bohemia (reduced). 
the bark being covered with a number of longitudinal rows of 
diamond-shaped leaf-scars ; [and it is now generally believed 
