268 SALVINIACEiE/ : [Azoila. 



1 



+ 



11. i. alpimimy L, — E. BoL U 234-. 



Hab, Elevated parts of the Rocky Mountains. Drummdnd, 



** Foliis distichisy stipulis hiseriatis semper superioribus, 



12. L. Douglasii; repens dichotome ramosum, foliis distichis ovalibus uninerviis nitidis 

 integerrimis, stipulis conformibus paululum falcatis apiculatis, spicis terminalibus cylin- 

 draceis, squamis cordato-acuminatis inferne ciliatis. Hook' et Grev. in Bat. Misc, t?. 12. 

 p, 396. — L. ovalifolium. Hook, et Grev, Ic. FiL L 177. (non Desv,) 



Hab. Near springs in woody places, N, W. America, Douglas. — An extremely distinct and well-marked 

 species, which I have never received from any collector except Mr Douglas, 



Ord. III. MARSILEACE^. Br 



1. ISOETES. L 



1. /, lacustris^ L, — E. Bot. — Ph, Am, 2. p, 671. 



Hab. Saskatchawan. Drummond, 



2. MARSILEA. L, 



1- M. vestita; folioHs cuneatis subobliquis petiolisque appi'esso-hirsutis, involucris 

 ovalibus hirsutis axillaribus pedunciilo subseqiie longis. Hook, et Grev, Ic, FtL t 159. 



Hab. Common on Menzies' Island and sandy banks of the Columbia, near the Grand Rapids. Douglas. 

 Dr Scouler, — The same species is found at Talisco, Mexico, by the Naturalists of Capt. Beechey's Voyage. 



Ord. IV. SALVINIACE^. BartL 



1. SALVINIA. L. 



1. S, natansy L, — Schkuh^^ FiL t, 173. Ph, Am, 2. p, 672 



Hab. Floating on stagnant waters, Canada, Pursh. 



2. AZOLLA. Lam, 



r 



1. A, Caroliniana^ Willd, Sp, PI, p, 431. Ph, Am, 2, p, 672. — A. microphylla, Kaulf, 

 Hook, et Am, Bot. of Beech, Voy. p, 162. 



Hab. Canada, on the still waters of Lake Ontario. Pursh. — I have not seen British North American 

 specimens of this singular aquatic. But I do not think the Californian A. microphylla of Kaulfuss differs 

 from this, nor this probably from the original A, Magellanica, 



