GENERAL MORPHOLOGY 293 
sometimes more sudden (Z. Dadhousiaeanum). Isolated sporangia in the 
sterile region are more rare than in § Se/ago, but they do occur (LZ. cartnatum, 
gnidioides, sguarrosum): also partially abortive sporangia have been seen 
at the base of the strobilus (Z. cariuatum). All these characters together 
Lycopodium Phlegmaria, L. A =figure showing habit of the whole plant. One-third. 
Bz=end of a branch. Natural size. C=a sterile leaf, somewhat enlarged. =sporo- 
phyll seen from below, enlarged. =a sporophyll seen from above, enlarged. (From 
Engler and Prantl.) 
show a very close similarity to what is seen in the Se/ago group, but with 
gradually increasing definition of the strobilus from the lower vegetative 
region. 
In the Phlegmaria group, which includes about eighteen species of 
5 5 +) 
epiphytic character, the spikes are slender, and dichotomously forked, 
with sporophylls as a rule very different in size from the foliage leaves 
(Fig. 142). Occasionally sporangia may be found in the vegetative region 
