34 MIDDLESEX FLORA. 



C. cocci nea, L. Scarlet-fruited Thorn. 

 Widely distributed; infrequent eastward, but rather common in 

 other seetious of the county. May. 



C. tomentosa, L., var. pyrifolia. Gray. 

 Cambridge (Jide specimen in tlie Gray Herb.) May. 



C. tomentosa, L., var. punctata, Gray. 

 Shrubs closely approaching this form liave been observed at Med- 

 ford and Hudson; and there is a specimen from Cambridge " inter- 

 mediate between pyrifolia and punctata" in the Gray Herb. 

 May. 



C. subvlllosa, Schrad. (C. tomentosa, L., var. mollis. Gray, 

 Man.) 

 Medfoid (L. L. Dame). Apparently native. Rare. May. 



PiRUS, L. 



P. COMMUNIS, L. Pear. 



Occasionally spontaneous, but less common than P. malus. May. 



Nat. from Eu. 

 P. MALUS, L. Apple. 



Frequently spontaneous in pastures and woods. May. Nat. from 



Eu. 

 P. arbutifolia, L., (var. erytiirocarpa, Gray, Man.) Choke- 

 berry. 



Connnon. May-June. 

 P. arbutifolia, L., var. melanocarpa. Gray. 



Common. May-June. 

 P. Americana, DC. Mountain Ash. 



Ashby and Townsend (L. L. Dame). Not common. June. 



Amelanchier, Medic. 



A. Canadensis, Torr. and Gray, (including var. Botryapium, 



Man.) Juneberry. Shadbush. 



Common. Apr. -May. 

 A. Canadensis, Torr. and Gray, var. oblongifolia, Gray. 



Common. Apr. -May. 



SAXIFRAGACE^^. SAXIFRAGE FAMILY. 



RiBES, L. 



*B. Cynoshati, L. Prickly Gooseberry. 



Concord, introduced from N. H. by Minot Pratt. May. 

 R. oxyacanthoides, L. (R. hirtellum, Michx., Man.) Wild 



Gooseberry. 



Common. May. 



