I. 7'halainiflora] 



VI. CRUCIFER^. 



15 



56. Arabis perfoliata, Lam. 



A. glabra, Bernh. 

 Glabrous Rockcress, Tower Mustard. 



57. Arabis Turiita, L. 



Toiver Rockcress^ To7vercress. 



58. Arabis hirsuta, Br. 



Hairy Rockcress. 



59. Arabis alpina, L. 



Alpine Rockcress. 



