32 COXXECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



SELAGINELLACEAE. 



SELAGINELLA Beauv. 

 Selaginella rupestris (L.) Spring (growing on rocks). 



Occasional. Dry exposed ledges, or sometimes on barren 

 soil. Aug. — Sept. 



Selaginella apus (L.) Spring (footless; i. e., without a stalk). 

 Frequent. Moist open or half-shaded ground, usually in 

 meadows and pastures or about springs. July — Aug. 



ISOETACEAE. QUILLWORT FAMILY. 



ISOETES L. Quillwort. 

 Isoetes Tuckermani A. Br. 



Rare or local. Growing submerged on gravelly shores of 

 ponds: Ledyard, North Stonington and East Lyme (Graves), 

 Lyme (Graves & Bissell). July — Aug. 



Isoetes foveolata A. A. Eaton (minutely pitted). 



Rare. Meriden, edge of small pond near West Peak (F. 

 W. Hall, 1873). Aug. 



Isoetes saccharata Engelm. (sugary), var. Amesii A. A. Eaton. 

 Rare. Shallow water of ponds and rivers : Griswold 

 (Harger), North Stonington (Graves & Bissell), Ledyard 

 and Lyme (Graves). July — Aug. 



Isoetes echinospora Dur. (prickly-spored), var. Braunii (Dur.) 

 Engelm. 



Occasional. Shallow water or muddy borders of ponds 

 and streams. July — Sept. 

 Isoetes echinospora Dur., var. muricata (Dur.) Engelm. 

 (beset with short, hard points). 



Rare. Groton, in Great Brook (Graves). July — Sept. 

 Forms approaching this have been found at Union (Bis- 

 sell), and at Lyme (Graves & Bissell). 



Isoetes Gravesii A. A. Eaton. 



Local. Muddy border of ponds and streams : Lyme 

 (Graves), Windsor (Bissell), East Haven (W. A. Setchell), 

 Bristol (J. N. Bishop), Plymouth (H. S. Clark & Bissell), 



