384 



STRUCTURE AND LIFE HISTORIES 



FIG. 2jg.Selaginella Watsoniana. Base of foliage leaf, showing ligule, 

 L. Enlarged about 36 times. 



FIG. 28o.Selaginella sp. Photomicrograph of a longitudinal section 

 rough the tip of a cone, showing sporangia (sp}, and ligules (tig.). 



throug 



(Cf. Fig. 268.) 



