﻿56 THE FERN BULLETIN 



255. Isoetes Howellii Engelm. Not uncommon. 



California to Idaho and Washington. — Isoetes 

 nu da Engelm. ; Isoetes Underzvoodii Haiders. 



The form Piperi (A. A. Eaton) is reported 

 with the type. — Isoetes Piperi A. A. Eaton. 



256. Isoetes Macounii A. A. Eaton. Very rare. 

 Atka Island oft the coast of Alaska. 



287. Isoetes macrospora Dur. Somewhat rare. New 

 Jersey, Lake Superior, Colorado and California 

 northward. The closely allied Isoetes lacustris 

 is common in Northern Europe. 



The form heterospora (A. A. Eaton) . — /. 

 heterospora A. A. Eaton is reported from 

 Maine ; f . paupercula Engelm. is reported 

 from Colorado and California. — Isoetes occi- 

 d entails Henders. 



288. Isoetes melanopoda, J. Gav. Common; in 

 wet weather lakes. Illinois. Iowa and Nebraska 

 to Texas and "California. The form pallida 

 Engelm. is reported from Texas and f. Cali- 

 fornica A. A. Eaton, from California. 



289. Isoetes melanospora Engelm. Very rare. 



Stone Mountain and vicinity, Georgia. 



290. Isoetes minima A. A. Eaton. Very rare. Damp 

 prairie near Waverly, Washington. Collected 

 but once. 



201. Isoetes Nuttallii A. Br. Rare: on the banks 



of rivers and streams. California to British 



Columbia and Idaho. 

 292. - Isoetes Orcutti A. A. Eaton. Rare : in wet 



weather pools. San Diego. California ; also in 



Lower California. 



