158 TETRADYNAMIA— SILICULOSA. Draba. 



Seeds many in each cell, small, roundish, without a border; 

 cotyledons accumbent. 

 A numerous herbaceous genus ; its pubescence forked or 

 starry. Leaves undivided. Fl. white or yellow, without 

 h'acleas. DeCandolle has 59 species, (I think them too 

 many,) besides 6 of his E?ophila, separated from Draba 

 mei'ely because of the cloven petals, an ambiguous cha- 

 ractex', some acknowledged Drahce having those parts oc- 

 casionally notched or entire. 



1. T). ver?ia. Common Whitlow-grass. 



Stalks radical, naked. Petals deeply cloven. Leaves lan- 

 ceolate, somewhat notched, hairy. 



D. verna. Linn. Sp. PL 806. Willd.v. 3.426. Fl. Br. 677. Engl. 

 Bot. u. 9. t.bS6. Curt. Lond.fasc. I. t. 49. Hook. Scot. 196. 

 Fl. Dan. t. 983. 



D. n.49G. Hall. Hist. V.]. 215. 



Erophila vulgaris. DeCand. Syst. v. 2. 356. 



Paronychia vulgaris. Raii Syn. 292. Ger.Em.62i.f. Dod. Pempt. 

 112./. 



P. alsinefolia. Lob. Ic. 469. f. Dalech. Hist. 1214./. 



Whitlow Cress. Petiv. H. Brit. t. 48./. 6. 

 Notched Whitlow Cress./ 7. 



On walls, banks, and dry waste ground, abundantly. 



Annual. March, April, 



Root fibrous, of considerable length. Stem none. Leaves several, 

 forming a star close to the ground, oblong-lanceolate, entire, or 

 in /3 notched, clothed with simple as well as forked hairs. Flower- 

 stalks one or more, radical, round, wavy, smooth, leafless, each 

 bearing a corymbose cluster of several inodorous white Jlowers. 

 Pet. cloven half way down. Pouch smooth, veiny. 



2. D. aizoides. Yellow Alpine Whitlow-grass. 

 Stalks solitary, naked. Petals slightly notched, twice the 



length of the calyx. Leaves lanceolate, rigid, keeled, 

 fringed. 

 D. aizoides. Linn. Mant.9\. Willd.v. 3. 424. Fl. Br.] 400. Comp. 

 ed. 4.109. Engl. Bot.v. 18. t. 1271. Jacq. Austr. t. 192. De- 

 Cand. Syst. V. 2, 333. Don H. Brit.fasc. 8. 186; cultiv. sped- 



7Yl€flS* 



D. n. 498. Hall. Hist. V.]. 215. 

 Sedum petreeum. Ger. Em. 514./ 

 S. petraeum montanum. Lob. Ic. 381./ 

 S. alpinum sextum. Clus. Pann. 491./ Hist. v. 2. 62, f. 

 Bursa pastoris alpina rosea lutea, &c. Moris. v. 2. 306. sect. 3. t. 20. 

 /9. 



