Tsoetes lacustris, L. 
LYCOPODIALES 
Fic. 155. 
A=plant of natural size. 
-ligule (¢), and sporangium (sf) seen from above. 
sections of the leaf-base; sf=sporangium; ¢@=ligule. (From Rabenhorst’s, Avyft. 
Flora.) 
mp | 
B=hbase of a fertile leaf with 
C=longitudinal and D transverse 
