388 



§ 2. Haloragece. 



MrRiOPHYLLUM, Vaill. Water Milfoil. 



spicatum, Linn, 

 verticillatum, Linn. 



HipPURis, Linn. Mares-Tail, 

 vulgaris, Linn. 



CACTACE^. The Cactus Family. 



Opuntia, Tourn. Prickley Pear. 



vulgaris, Mill. Falls of the St. Croix, Dr. Parry. 



GROSSULACE^. The Gooseberry Family. 



RiBES, Linn. 



Cynosbati, Linn. Prickly Gooseberry, 

 hirtellum, Michx. Smooth Gooseberry, 

 rotundifolium, Michx. Swamp Gooseberry, 

 floridum, Linn. Wild Black Currant, 

 rubrum, Linn. Wild Red Currant. 



CUCURBIT A CE^E. The Cucumber Family. 



EcHiNOCYSTis, Torr. & Gray. 



lobata, Torr. & Gray. Wild Cucumber. 



CRASSULACE.E. The House-Leek Family. 



Penthorum, Gronov. 



sedoides, Linn. Stonecrop. 



SAXIFRAGACE.E. The Saxifrage Family. 



Saxifraga, Linn. Saxifrage. 



Aizoon, Jacq. Lake Superior, Dr. Z. Pitcher. 

 Virginiensis, Michx. Lake Superior, Dr. Houghton. 

 Pennsylvanica, Linn. 



Heuchera, Linn. Alum Root. 

 Americana, Linn. 



MiTELLA, Tourn. Mitrewort. 



diphylla, Linn. Currant Leaf, 

 nuda, Linn. 



Chrysosplenium, Tour. Golden Saxifrage. 



Americanum, Schw. Lake Superior to Up. Mississippi, Dr. Houghton. 



