54 



THE FERN BULLETIN 



275. Selaginella Watsoni mutica (D. C. Eaton.) 

 Rare. Mountains of Colorado, Arizona and 

 New Mexico. — Selaginella mutica. D. C. 

 Eaton. 



ISOETACEAE. 



ISOETES L. 



27G. Isoetes Bolanderi Engelm. Not uncommon; 

 in mountain lakes. Colorado, Utah and Cali- 

 fornia. 



The form pygmaea (Engelm.) is a small 

 form collected but once. — Isoetes pygmaea 

 Engelm. Form Sonnei is reported from Don- 

 ner Lake, California. 



Isoetes Butleri Engelm. Rare ; in wet weather 

 lakes. Prairies of Tennessee. Missouri and 

 Oklahoma. The form immaculata occurs with 

 the type. 



Isoetes Canadensis (Engelm.) Rare: in rivers 

 and streams. Maine to Ontario and Pennsyl- 

 vania ; also in British Columbia. — Isoetes 

 Dodgei A. A. Eaton. 



The form Robinsii A. A. Eaton is reported 

 from Massachusetts and the form Amesii 

 (A. A. Eaton) apparently belongs here. — 

 Isoetes saccharata Amesii A. A. Eaton. 



279. Isoetes Echinospora Braunii (Dur.) Com- 

 mon ; in lake^ and ponds. Pennsylvania, Utah 

 and Washington to Alaska and Greenland. 

 The typical species is also found in Europe. — 

 Isoetes Echinospora Brittoni Cockerell. 



The following forms have been reported 



