405 



Celtis, Tourii. 



occidentalis, Linn. Hack Berry. 



SAURURACE^E. The Lizard's Tail Family. 



Saururus, Linn. Lizard's Tail. 



cernuu?, Linn. Upper Mississippi, Dr. Hougliton. 



CALLITRICHACE>'E. 



Callitriche, Linn, 

 verna, Linn. 



EUPHORBIACEyE. The Spupge Family. 



Euphorbia, Linn. 



corollata, Linn, 

 maculata, Linn, 

 hypericifolia, Linn. St. Croix, Dr. Parry. 



EMPETRACE.^. The Ceowberry Family. 



Empetrum, Tourn. Crowberry. 



nigrum, Linn. Lake Superior, Dr. Hougliton. 



JUGLANDACE^. The Walnut Family. 



Juglans, Linn. Walnut. 



cinerea, Linn. Butternut or White- Walnut, 

 nigra, Linn. Black-Walnut. 



Carya. Nutt. Hickory. 



alba, Nutt. Shag-Bark Hickory. 



glabra, Torr. C. porcina, Nutt. Pignut Hickory. 



CUPULIFER^E. The Oak Family. 



Quercus, Linn. Oak. 



alba> Linn. While Oak. 



obtusilpba, Michx. Q. stellate, Willd. Post Oak. Upj^er Mississippi, 



macrocarpa, Michx. Burr Oak. [Dr. Houghton. 



bicolor, Willd. Swamp White Oak. 



Prinos, Linn. Swamp Chestnut Oak. Near Janesville, I. A. L. 



rubra, Linn. Red Oak. 



palustris, Linn. Pin Oak. 



Fagus, Tourn. Beech, 

 ferruginea, Ait. 



