CATALOGUE OF PLANTS. 79 



NASTURTIUM, R. Br. WATER CRESS. 

 N. palustre (Leys.), DC. MARSH CRESS. 



Kare. Field, Somesville (Rand). Doubtless introduced. 



N. ARMORACIA (L.), Fries. HORSERADISH. 



Rare. Escaped from cultivation to waste places. Somesville 

 (Rand). Adventive from Europe. 



BARBAREA, R. Br. WINTER CRESS. 

 B. vulgaris, R. Br. YELLOW ROCKET. 



Rare. Wayside, Bar Harbor (Rand). Lately introduced. 



SISYMBRIUM, L. HEDGE MUSTARD. 



S. OFFICINALE (L.), Scop. COMMON HEDGE MUSTARD. 



Roadsides and waste places. Naturalized from Europe. 



BRASSICA, L. 

 B. SlNAPlSTRUM, Boiss. CHARLOCK. 



Old fields and waste places ; infrequent. Northeast Har- 

 bor; Southwest Harbor; Somesville (Rand). Adventive from 

 Europe. 



B. NIGRA (L.), Koch. BLACK MUSTARD. 



Old fields and waste places; frequent. Northeast Harbor; 

 High Head; beach, Greening Island; Southwest Harbor (Rand). 

 Adventive from Europe. 



B. CAMPESTRIS, L. TURNIP. 



Old fields and waste places; frequent. Somesville (R. & 

 R. ) ; Seal Harbor (Redfield) ; Southwest Harbor ; Northeast 

 Harbor (Rand). Introduced from Europe. 



CAPSELLA, Medic. SHEPHERD'S PURSE. 



C. BURSA-PASTORIS (L.), Moench. 



A common weed, even at Duck Islands (Redfield). Natural- 

 ized from Europe. 



