[Vol. 9, 1922] 

 222 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



EXPLANATION OF PLATE 



PLATE 14 



Fig. 9. Isoetes velata var. Perralderiana Pfeiffer. Megaspores. 



Fig. 10. 7. velata A. Br. Megaspores. 



Fig. 11. 7. tcgulcnsis Genn. Megaspores. 



Fig. 12. 7. alpina Kirk. Megaspores. 



Fig. 13. 7. Kirkii A. Br. Megaspores. 



