224 



[Vol. 9, 1922] 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 





Explanation of Plate 



PLATE 15 



Fig. 14. Isoetea Gunnii A. Br. Megaspores. 

 Fig. 15. J. Drummondii A. Br. Megaspores. 

 Fig. 16. /. histrix Bory & Dur. Megaspores 



Fig. 17. 1. Nut t aim A. Br. Megaspores. 

 Fig. 18. I. Orcuttii Eaton. Megaspores. 



