THE PTERIDOPHYTA : LYCOPSIDA, ETC. 



.■>// 



STEM APEX 



LEAF 



SUSPENSOR 



STEM 



LEAF 3 



STEM APEX 



FOOT 



LEAF I 



Fig. 586. — Lycopodium onnotimim. A and B, Young embryo. C, Embno from above, 

 showing origin of leaves and primary root arising from the stem apex. D, Young plant 

 with foot and stem with reduced leaves. {After Bruchmann.) 



The life history of Lycopodium clavatum may be illustrated graphically 

 by the diagram overleaf (Fig. 587). 



Selaginella kraussiana. 



This species of SeJaoinella is not a native of this country, but occurs 

 commonly in South Africa and the Azores. It is, however, cultivated very 

 frequentlv in greenhouses, where it reproduces itself very readily, and it 

 is naturalized in one or two places in Britain (Fig. 588). 



