FERN CULTURE AND PROPAGATION. 
33 
new metliod of reproduction, termed apospory.* Propaga- 
tion in these cases is effected, not by spores, but from 
peculiar growths at the back of the fronds or at the tips of 
their ultimate divisions, which growths, when pegged down, 
yield young plants by the generative process usually peculiar 
to spores. 
Finally, there is the method of spore-propagation, which, 
involving as it does a description of the spore itself and its 
peculiarities, merits an independent chapter. 
Vide Appendix. 
