92 

 Order hi. Selaginellace.-e. 



526. SELAGINELLA, Beauv. 

 12G7. S. rupestris, Spring. 



Rare. Cliffs of Niagara River, near the Devil's Hole. 

 12G8. S. Apus, Spring. 



527. ISOETES, L. 



1269. I. echinospora, Durieu, var. Braunii, Engelm. 



Order 112. Salviniace.e. 



528. AZOLLA, Lam. 



1270. A. Caroliniana, Willd. 



Rare. Burnt Ship Bay, Grand Is., Niagara River, Clinton; 

 Niagara Falls, Dr. J. IV. Robbins. 



