18 



Hydrastis 



Canadensis. L i n n. Yellow-rout. 



Hydrocotyle 



Americana. Linn, 

 lineata. Michaux. 

 umbellata. Linn, 

 vulgaris. Linn. 



Hydropeltis 



purpurea. Michaux. Water- Target. 

 Hydrophyllum 



appendiculatum. Michaux. 

 Canadense. Linn. 



Hyoscyamus 



niger. Linn. Black- Henbane. C. 

 Hypericum 



Ascyroides. W i 1 1 d e n o w. 

 Canadense. Linn, 

 corymbosum. Will d enow, 

 parviflorum. Willdenow. Low- Centaury. 

 perforatum. Linn. John's-wort. 

 Virginicum. Linn. 

 Hypopithys 



lanuginosa. N u 1 1 a 1 1. 



Hypoxis 



erecta. Linn. 



Hyssopus 



Nepetoides. Linn. 

 Scrofularifolius. Willdenow. 



Ictodes 



fcetidus. B i g e 1 o w. Skunk-Cabbage. 



Ilex 



Canadensis. Michaux. 

 opaca. Ait on. 



Impatiens 



fulva. N u 1 1 a 1 1. Clear-wort. 



Inula 



Helenium. Linn. Elecampane. C. 



Ipomoea 



purpurea. LaMarck. Morning-glory. C. 



Iris 



prismatica. Purs h. 

 versicolor. Linn. Blue-Flag. 



