LYCOrODlACE.^. 



[ 481 ] 



LYCOPODIACE.E. 



leaves are either scattered all along- the 

 stem, or collected into spikes resembling, on 



Fig. 425. 



a small scale, elongated Pine-cones (figs. 425, 

 435). The plants of the genus Lycopodium 

 proper, exhibit both these conditions ; but 



YiK. 420. 



Fig. 427. 



Lycop odium complanatum. 

 One third the natural size. 



Fig. 428. 



Selaginella cemua. Half natural size. 



Selaginella apoda. 



Fig. 426. Scale with oosporange. Magn. 20 diams. 

 Fig. 427. Scale with poUen-sporange. Magn. 20 dianis. 



in all these the spores are small and nume- 

 rous and alike. In SelagincUa, to which 

 belong the elegant creeping Club-mosses, 

 with flattened leafy stems (often with a 

 metallic lustre), now so much grown in 

 Wardian cases (fig. 428), the capsular leaves 

 are in spikes, which are found forming one 

 arm of a bifurcation of the stem, while the 

 other continues the vegetative growth ; and 

 in the spikes we find the capsules on the 

 lowest scales (oosporant/es) producing only 

 fjur spores (macro - 

 spores, figs. 426, 429), 

 of much larger size 

 than tho.se (micro- 

 spores) contained in 

 large number in the 

 other spore-cases {pol~ 

 len-sporanges, figs. 

 427, 430). In Lyco- 

 podium and Selaginella 

 the sporanges have but 

 one cavity ; in Tme- 

 sipferis the sporanges 

 are two-ceUed, and in 

 Psilotnm three-celled. 

 In Isoetes (fig. 376, 

 p. 443), where all the 

 leaves are seated on a 

 tuberous stem, and 

 most of them fertile, 

 the sporanges contain- 

 ing spores of each kind 

 are many-celled, and 

 immersed in the sub- 

 stance of the base9 of 

 the leaves. 



2 I 



