TETR ADYNAMIA SILTQUOSA. Arabis. 193 



Stem upright, slightly branched. Pods smooth, irre- 

 gularly swollen, equal-sided, nearly upright. H. ino- 

 dora. E. B. 731. Viola matronalis. G. E. 462. 



Hilly pastures, near rivulets, but rare. Fringford. Mr. Roundell 

 Palmer, Trinity Coll. Oxford. (Near Cheltenham, on the 

 Cotswold ridge.) Sin. Frequent in gardens. . • 



Per. May, June. 



(Somewhat hoary. Fl. terminal, corymbose, pale purple, or white ; 

 very fragrant in the evening. Sm. Pods without thickened margin. 



'ARABIS.' Wall-cress, or Rock-cress. 



A. thalidna. Common Wall-cress. Leaves hairy, more 

 or less toothed ; root-ones somewhat stalked, spear- 

 oblong. Stamens not much shorter than the petals. 

 Stem branched. Pods pointing upwards. E. B. 901. 

 C. 2. 49. Sisymbrium thalianum. of H. Br. Fi. 



Walls, dry, sandy ground. 



An. April . 



Root tapering. Stem solitary, slender, upright, two to ten inches, 

 branched, leafy. Ls. root- ones close to the ground, the rest 

 alternate, stalkless, smaller. Fl. white, corymb-stalks small, 

 growing at length into a lengthened out raceme. Cal: bristly 

 upwards. Honey-bearing glands very minute, at the base of 

 stams. Siliques slightly curved. 

 Plant pungent : soon withers away after seeding. 



A. hirsuta. Hairy Wall-cress. Leaves toothed and 

 bristly. Stem rough, with simple spreading hairs. 

 Pods quite erect, with slightly keeled valves. Turritis 

 hirsuta. Sb. 204. E. B. 587. 



Old walls, stony banks. * * Rewley iVbbey . yS?>. Holton Park 

 wall. R. W. Bank on Shotover Hill. B.i\ 



Per. June. 



Root woody. Stems many, one much stronger than the rest, erect, 

 one f, and a half, leaty, branched. Ls. root-ones inversely egg- 

 shaped, slender at their base, stem-Is. halbert-spear-shaped, 

 partly embracing the stem. Fl. small, v.diite, corymb becoming 

 racemose. Siliq. numerous, in a long spike, beaded as it were 

 by the projecting seeds, crowned with the almost stalkless 

 stigma. 

 By cultivation becomes almost smooth. 



A. Turrita. Tower W. Upper leaves toothed, clasp- 

 ing the stem. Flower-stalks the length of the calyx, 

 each with a leafy bractea. Pods linear, flat, thick- 



' Chiefly of a northern lieinispheie. 

 O 



