CABBAGE FAMILY 



39 



and amplexicaul ; flowers small, white. A stiff, erect plant, 

 frequent on w^lls and banks. — Fl. June — August. Biennial. 

 6.^ A. Turrita (Hairy Tower Mustard), naturalised, but very 



.«Lffe 



Xrabis glabra {Sinooth Tower Mitstard). 



rare, on old walls, chiefly at Oxford and Cambridge, has an erect 



stefu, over a foot high, with forked hairs, amplexicaul cauline 



leaves, and bracteate ytWovf flowers. — Fl. May — July. Perennial. 



7. A. glabra (Smooth Tower Mustard). — Erect, glaucous ; stem 



