MIDDLESEX FLORA. 21 



ANACARDIACE>C CASHEW FAMILY. 



Rhus, L. Sumach. 



R. typhina, L- Staghoen Sumach. 



Common. June-July. 

 R. glabra, L. Smooth Sumach. 



Common. The form var. laciniata, Carriere, hag been found 



along the F. E. R. in Weston. June-July. 

 R. copallina, L- Dwaef Sumach. 



Rather common. July. 

 R. venenata, DC. Poison Sumach. Dogwood. 



Common. June. 

 R. Toxicodendron, L. Poison Ivt. Mercury. 



Both the upright and running forms are very common. June. 

 S. CoUnus, L. 



Often found escaped, but can scarcely be considered naturalized. 



June. Int. from Eu. 



VlTACEy^. VINE FAMILY. 



ViTis, Tourn. 



V. Labrusca, L. Northern Fox Grape. 

 Common. A variety with white fruit occasional. June. 



V. aestivalis, Michx. Summer Grape. 

 Groton (C. W. Jenks) ; Medford (Gtcorge E. Davenport) ; Concord, 

 rare (Minot Pratt) ; Weston (L. L. Dame) . Less common than 

 V. Labrusca. June. 



V. riparia, Michx. (V. corditolia, Michx., var. riparia, Man.) 

 Sudbury (Dr. C. W. Swan). The V. cordifolla reported at Concord 

 by Minot Pratt is probably this species. Rare. May. 



Ampelopsis, Michx. 



A. quinquefolia, Michx. Woodbine. Virginia Creeper. 

 Common. July. 



Ehamnacke. Buckthorn Famtlt. 

 Ehamnus, Tourn. 

 K. cathartica, L. Buckthorn. 

 Medford, Framingham, Ashland, et al. May-Jime. Nat. from Eu. 



Cbanothus, L. 

 C. Americanus, L. New Jersey Tea. 

 Common. July. 



