(50 
GROUP III; GENUS II. 
OPHIOGLOSSUM. 
Thec^. Situated upon the opposite sides of an erect, 
flattened spike ; two-valved, and imbedded in 
the fleshy spike, to which they impart a 
serrated appearance. 
Venules. Anastomosing. 
GROUP III; GENUS II; SPECIES I. 
OPHIOGLOSSUM LUSITANICUM. (Little Adder's Tongue.) 
Plate XX. 
I* Ronds. Divided into two branches, barren and fertile. 
Barren branch entire, linear, narrow, and 
obtuse at apex. Fertile branch an erect spike, 
the head of which is lance- or club-shaped, 
and in which the thecae are imbedded. The 
two branches dividing below the surface of the 
ground. Roots fibrous, thick and brittle. 
Growth. Erect. 
