No. 50.] 
167 
Order THYMELACE^E. The Mezereum Tribe, 
DiRCA, L, Leather-wood. 
palustris, L. Woods, near streams . April. 
Order SANTALACE^E. The Sanders-Wood Tribe. 
Nyssa, L. 
multiflora, Walt. N. sylvatica, Michx. sylv. N. villosa, Willd. 
Black Gum. Woods. May- June. 
CoMANDRA, Nutt. 
umbellata, Nutt. Bastard Toad-flax . Rocky hills . June . 
Order ARISTOLOCHIACEiE . The Birthwort Tribe. 
Aristolochia, L. 
serpentaria, L. Virginia Snake-root . Shady woods . June . 
ASARUM, L. 
canadense, L. Wild Ginger, Coltsfoot. Rocky woods. May. 
Order EMPETRACEiE. The Crowberry Tribe. 
Empetrum, L. Crowberry. 
nigrum, L. Summit of Mount Marcy and Mount Mclntyre. July. 
Found also on Whiteface Mountain, by Dr. Em- 
mons and Prof. Hall. 
Order EUPHORBIACE^E . The Euphorbium Tribe. 
AcALYPHA, L. Three-seeded Mercury . 
virginica, L. Fields and road sides. June-August. 
Euphorbia, L. Spurge. 
hypericifolia, L. E. maculata, Michx. Road sides and sandy 
fields . July-September . 
maculata, L. E. depressa, Torr. in Ell. sk. Cultivated grounds 
and sandy fields . July-September . 
polygonifolia, L. E. maritima, Nutt. Seacoast. August, 
obtusata, Pursh. Sandy fields and river banks . July- August. 
