FLORA OF WORCESTER COUNTY. 



Alyssum, Tourn. Alyssum. 



*calycinum, L. 

 Camelina, Crantz. False Flax. 



*sativa, Crantz. 

 Nasturtium, R. Br. Water-Cress. 



*ofificinale, R. Br. True Water- Cress. 



palustre, DC. Marsh Cress. 



* " " var. hispidum, DC. 



*Armoracia, Fries. Horseradish. 

 Barbarea, R. Br. Winter Cress. 



vulgaris, R. Br. Common Winter Cress. 

 Sisymbrium, Tourn. Hedge Mustard. 



*ofificinale. Scop. Hedge Mustard. 



Brassica, Tourn. Mustard. 



*nigra, Koch. Black Mustard, 

 Capsella, Medic. Shepherd's Purse. 



*Bursa-pastoris, Mcench. 

 Thlaspi, Tourn. Pennycress. 



*arvense, L. Field Pennycress. 

 Lepidium, Tourn. Peppergrass. 



Virginicum, L. Wild Peppergrass. 



*ruderale, L. 

 Raphanus, Tourn. Radish. 



*Raphanistrum, L. Wild Radish. 



Occasional. 



Occasional. 



Common. 



Not rare. 

 Escaped. 



Worcester. 

 I'ro/. Eaton. 



Waste places. 



Very common. 



Waste places. Rare. 



Common. 

 Not common. 



Lunenburg. 



Mr. Kilhiirn. 

 *sativus, L. Garden Radish. Occasionally spontaneous. 



CISTACE^. 



Helianthemum, Tourn. Rock-rose. 



Canadense, Michx. Frost-weed. Common in dry grounds. 



