METROPOLITAN PARK FLORA. 



ARABIS, L. Rock Cress. 

 A. laevigata, Poir. 



Rocky places. M, occasional ; Cascade region ; open woods, 

 N. of Pine Hill, etc. 

 A. Canadensis, L. Sickle-pod. 



Open woods. B*, rare ; Wild-cat Notch, etc. : — M*, rare. 



ALYSSUM, Tourn. 



A. maritimum, L. Sweet Alyssum. 



Cult, from Eu. B, spreading about beds and walks in old 

 garden, Park's place, Hawk Hill. 



NASTURTIUM, R. Br. Water Cress. 



N. officinale, R. Br. True Water Cress. 



Cult, from Eu. and escaped into brooks and ditches. M, 

 occasional; ditch near Ravine Road, etc.: — S*, Happy 

 Valley : — - B B, common. 



N. palustre, DC. Marsh Cress. 



Wet places. M, common. 



BARBAREA, R. Br. Winter Cress. 



B. vulgaris, R. Br., var. arcuata, Fries. Common Winter 



Cress. Yellow Rocket. 

 Wet places. JS, frequent : — M and B B*, occurs. 

 B. striata, Andrz.-j- B. vulgaris, var. striata, Gray, Man. 

 ed. 6, 70. 

 Wet places. M, occurs: — B B* , near Trapelo Road in 

 N. section. 



SISYMBRIUM, Tourn. Hedge Mustard. 



S. OFFICINALE, Scop. COMMON HEDGE MUSTARD. 



Nat. from Eu. in waste places. B and M, common. 



BRASSICA, Tourn. 

 B. Sinapistrum, Boiss. Charlock. 



Adv. from Eu. in waste places. #*, Washington St. 



t See Syn. Fl. K. Amer. i. pt. 1, 150. 



