CABBAGE FAMILY 



39 



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

 frequent on walls and banks. — Fl. June — August. Biennial. 

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



Xrabis glabra {Smooth Tower Mustard). 



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

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

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

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



