210 TETRADYNAMIA— SILIQUOSA. Arabis. 



Draba siliquosa similis planta prsecox annua. Moris, v. 2. 235. 



sect. 3. t. 7./. 5. 

 Aizoon Telephium. Dalech. Hist. 1131./. 

 Thale Cress. Petiv. H. Brit. t. 48./. 1. 

 /3. Turritis minor foliosa. Rail Syn. 294. 

 Brassica spuria minima, caule magis folioso hirsutior. Raii Syn. 



ed. 1.241.ed. 2. 166. 

 B. spuria exilis, non laciniata, caule magis folioso hirsutior, foliis 



subrotundis. Pluk. Phyt. t. 80./ 2. 

 Broad Tliale Cress. Petiv. H. Brit. t. 48./ 2. 



On walls, dry banks, cottage roofs, and dry sandy ground, every 

 where. 



Annual. April. 



Root tapering, fibrous. Herb varying greatly in luxuriance, up- 

 right, simple or branched, hairy, light green, from 3 to 12 inches 

 high. Leaves various in shape and size, lanceolate, ovate, or 

 obovate, entire or unequally notched, their pubescence short, 

 mostly forked J radical ones close to the ground, numerous, 

 stalked ; the rest smaller, few, and scattered, sometimes linear- 

 lanceolate. Fl. small, white, corymbose, on slender stalks. 

 Cal. generally a little bristly in the upper part. Pet. twice as 

 long, nearly upright. Glands minute, and inconstant, curved, 

 but scarcely protruding between the calyx-leaves. Pods ascend- 

 ing, on spreading stalks, slender, somewhat curved, smooth, 

 hardly an inch long. 



Plukenet's and Petiver's figures of the variety jS are very dissimilar, 

 but specimens may be found answering to either, nor are any of 

 the varieties at all constant. The whole plant has a warm pun- 

 gent flavour, like the rest of its class. 



2. A. siricta. Bristol Rock-cress. 



Leaves toothed, obtuse, bristly ; radical ones somewhat ly- 

 rate. Stems hairy. Petals nearly erect. Calyx smooth. 



A.stricta. Huds.292. Fl.Br.7l2. Engl. Bot. v. 9. t. 614. Velley 

 Pl.Marit.t.b. Shiercliff, Bristol Guide, S3, f. Hook. Lo7id.t.4. 

 DeCand. Syst. v. 2. 224. Willd. Sp. PL v. 3. 539. 



A. hispida. Ait. H. Kew. ed. ].v. 2.400 ; not of Linnaus. 



A. n. 453. Hall. Hist. ?;. 1 . 1 97. Noviencl. 42. 



Turritis Raii. Villars Dauph. v. 3. 326. t.38. 



Hesperis alpina minor, flore albo, siliquis longis. Raii Syllog. 296. 

 I have it from Mount Saleve. 



Cardaminepumila,bellidis folio, alpina. Raii Syn. ed. 2. 172. ed.3. 

 300 ? but not of Gerarde, whose wooden cut, copied by Pe- 

 tiver, H. Brit. t. 47. f. 9, really belongs to Arabis purnila of Jac- 

 quin, A. nutans, Willd. v. 3. 537. 



On limestone rocks in the south-west part of England. 



On St. Vincent's rocks near Bristol. Huds. Velley. On the south 



