The Anatomy of Nephrolepis volubilis J.Sm. 257 
Text-fig. 3. N. volubilis. Diagrammatic longitudinal section through 
the lateral plant and the region of branching of the primary stolon. S, S 2 , 
two stolons arising on the lateral plant. L, L 2 , leaves, each possessing three 
strands. Cortex black, vascular strands white. 
Text-fig. 4. N. volubilis. Diagrams to illustrate behaviour of protoxy- 
lems in region of branching of primary stolon. The vertical fluted column is 
the xylem-cylinder of the primary stolon, the ridges being the protoxylem 
strands. The protoxylems supplying the secondary stolon are represented in 
bolder lines. The broken lines in b, c, d, represent the portions of strands 
passing behind the secondary stolon, a is a side view of b. For further 
explanation see text. 
