1894] PLANTS OF MONROE COUNTY. 47 



75. N. Armoracia Fries. [J^orzpa A rmoracia (L.) A. S. Hitchcock]. Horse- 



radish. Wet places, ditches, waste places ; common. 



38. BAKBAREA K. I?r. 



76. B. vulgaris R. Br. [B. Barbarca (L.) McM.] Common Winter Cress. 



Yellow Rocket. 

 Wet grounds, ditches, roadsides ; common. 

 Tj. B. PRECOX R.Br. \B. prarox (J. E. Smith) R. Br. | Early Winter 

 Cress. Rare. Opposite the grove on Lake avenue, Rochester, /.. 

 Holscr. Brockport, Prof. IV. H. Lennon. 



Sg. H/iSPEKJS Tourn. [L.] 



78. H. matronalis L. Dame's Violet. 



Rare. Bank of Allen's creek, Penfield, Rev. J. IVa/ion. 



40. ERYSIMUM Tdurn. [L.] 



79. E. cheiranthoides L. Worm-seed Mustard. 



Dry or moist soil ; infrequent ; most abundant in dry sandy land. 

 Roadsides, north Goodman and Prince streets, Rochester. Sandy fields 

 near Irondequoit bay, Penfield. Gates, G. T. Fish. 



41. SISYMBRIUM Tourn. [L.] 



80. S. officinale Scop. [^. officina/c, (L.) Scop.] Hedge Mustard. 



Waste places and roadsides ; very common. 



81. S. Thaliana Gaud. \Stcnophrag]na Thaliana (L.) Celak.] Mouse-ear 



Cress. 



Dry sterile soil ; rare. Rochester, Dr. C. M. Booth. Wayne county. 



42. BRASSICA Tourn. [L.] 



82. B. SiNAPisTRUM Boiss. Yellow Mustard. English Charlock. 



Fields, roadsides, waste places ; common. 



— B. alba Boiss. \Sinapis alba L.] White Mustard. Escapes rarely. 



83. B. NIGRA Koch. \^B. nigra (L.) Koch.] Black Mustard. 



Cultivated fields, waste places, along streams ; common. 



— B. CAMPESTRis L. RuTA-BAGA. Occasionally spontaneous. 



— B. Rapa L. Turnip. Occasionally spontaneous. 



43- CAPSELLA Medic. [Bursa Weber.] 



84. C. Bursa-Pastoris Mcench. {Bursa Biirsa-Pastoris (L.) Weber.] Shep- 



herd's Purse. Everywhere abundant. 



44. THLASPI Tourn. [L.] 



85. T. arvense L. Field Penny-cress. Mithridate Mustard. 



Rare. Roadside, Bergen, Genesee county, G. T. Fish. 



45. LEPIDIUM Tourn. [L.] 



86. L. Virginicum L. Wild Pepper-grass. 



Roadsides and waste grounds ; common. 



87. L. intermedium Gray. 



Equally common with the preceding, which it resembles closely. 



