274 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



B. CAMPESTKis L. Rutabaga. — An occasional escape. Dump, 

 Lee; Sheffield (Walters). 



B. JAPONiCA Siebold. — Rarely adventive. 



B. JUNCEA (L.) Cosson. — Roadsides and waste ground; frequent. 



B. NIGRA (L.) Koch. Black Mustard. — Roadsides and waste 

 ground; occasional. Lanesboro; New Marlboro; Sheffield. 



B. Napus L. Rape.— Fallow field, Williamstown. 



B. oleeacea L. Cabbage. — Dump, Lee. 



B. Rapa L. Turnip. — Cultivated ground, Lanesboro (Churchill). 



CAMELINA. 



C. MICROCAEPA Andrz. — Rarely adventive. In field of buckwheat, 

 Lenox. 



CAFSELLA. Shepherd's Purse. 

 {Bursa 111. Fl. ed. 2.) 



C. BuESA-PASTOEis (L.) Medic. Shepherd's Purse. — Dry fields 

 and cultivated ground; common. 



CARDAMINE. Bitter Cress. 



C. bulbosa (Schreb.) BSP. — Wet shaded ground; frequent in the 

 southern part of the valley. Stockbridge; Great Barrington (Wal- 

 ters); Sheffield (Fernald). 



C. Douglassii (Torr.) Britton. — Partly shaded bank, Sheffield 

 (Walters). 



C. parviflora L. — Shaded rocks, Harvey Mt., West Stockbridge. 



C. pennsylvanica Muhl. — Moist ground; common. 



C. PRATENSis L. Cuckoo Flower. — In lawns. Williamstown; 

 Dal ton; Stockbridge. 



var. palustris Wimm. & Grab. — ( Vid. Rhodora, 22 : 14, 1920.) 



Occasional and indigenous in cold bogs and wet meadows in the 

 valley. Stockbridge; West Stockbridge (Evans, Fernald and Knowl- 

 ton); Egremont and Sheffield (Walters). 



Differs from the type in the white petals and in having the terminal 

 leaflet of the basal leaves entire or obscurely toothed; lateral leaflets 

 of the middle and upper cauline leaves usually with a distinct petiolule. 



