384 



STRUCTURE AND LIFE HISTORIES 



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FIG. 279. Selaginella Watsoniana. Base of foliage leaf, showing ligule, 

 L. Enlarged about 36 times. 



FIG. 280. Selaginella sp. Photomicrograph of a longitudinal section 

 through the tip of a cone, showing sporangia (sp), and ligules (%.). 

 (Cf. Fig. 268.) 



