52 Annals of the Carnegie Museum. 



ISNARDIA Linn:^jus. 

 LUDWIGIA Linnreus. 



* I. palustris Linnaeus. Water-purslane. 



EPILOBIUM Linnaeus. 



* E. coloratum Muhlenberg. Puri)le-leaved willow-herb. 



CHAM.ENERION Adanson. 



* C. angustifolium (Linnaeus), (jreat 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 LinnKus. 



'!^ G. biennis Linnaeus. I5iennial gaura. 



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

 Mellor. 



CIRCiEA Linnjeus. 



* C. Lutetiana Linnaeus. Enchanter's nightshade. 



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



PASSIFLORACE^ Dumortier. 

 PASSION-FLOWER FAMILY. IV-80. 

 PASSIFLORA Linnasus. 

 ^ P. lutea Linnjeus. Yellow passion-flower. 



