52 Annals of the Carnegie Museum. 



ISNARDIA Linnceus. 

 LUDWIGIA Linnseus. 



* I. palustris Linnaeus. Water-purslane. 



EPILOBIUM Linnfeus. 



* E. COloratum Muhlenberg. Purple-leaved willow-herb. 



CHAM^NERION Adanson. 



* C. angustifolium (Linneeus). Great willow-herb. 



ON AGRA Adanson. 

 CENOTHERA Linnaeus. 



* 0. biennis (Linnaeus). Evening-primrose. 



KNEIFFIA Spach. 

 CENOTHERA Linnaeus. 



* K. pumila (Linnaeus). Small sun-drops. 



* K. fruticosa (Linnaeus). Sun-drops. 



GAURA Linnaeus. 



* G. biennis Linnaeus. Biennial gaura. 



McKees Rocks, near the Indian Mound, August, 1896. C. C. 

 Mellor. 



CIRCiEA Linn^us. 



* C. Lutetiana Linnseus. Enchanter's nightshade. 



§ C. alpina Linnaeus. Smaller enchanter's nightshade. 



PASSIFLORACE^ Dumortier. 



PASSION-FLOWER FAMILY. IV-80. 



PASSIFLORA Linn^us. 



* P. lutea Linnaeus. Yellow passion-flower. 



