PL ex. thai. 80. CRUCIFER.^. 444. Draba. 607 



XXVII. 444. DRABA. Dioscorides. Whitlow-grass. 

 Siliculce not notched, oval ; valves flat, or slightly con- 

 vex ; cells many-seeded ; seeds margined ; cotyledons ac- 

 cvLvaheiil', Jilaments toothless. 



1 . Draba verna. Spring whitlow- grass. 

 Scape naked; leaves oblique, pointed, hirtous, slightly 



serrate ; petals 2-cut. 



Paronvchui vulgaris, Rail Syn. 292, 1 ; Ger, em, 624, 1. 



Paronychia vulgaris alsines folio, Park, 556. 



Draba verna, Lin. S. P. 896. 



Common whitlow grass. Whiteblow. Nailwort. 



Walls; annual; March and April. 



Leaves radical, hairy; hairs simple or forked; scape up- 

 right, simple, racemose ; petals white; siliculce bald crowned 

 by a sessile persistent stigma. — Eaten as a sallad, also used 

 in whitlows or felons. 



2. Drala rupesfris. Rock ivhitlow-grass. 

 Scape naked or 1 -leaved; petals not cut; siliculcB lanceo- 

 late, downy ; leaves flat, lanceolate, hairy. 



Draba hirta. Smith Fl. Brit. 677, not of Linnaeus. 

 Draba stellata, Dickson Tr. Lin. Soc. 2, 288. 

 Draba rupestris, R. Brown in Hort. Kew, 91. 



Alpine rocks ; perennial ; May and June. 



Roots tufted; leaves radical, lanceolate, fringed; some- 

 times hairy beneath ; hairs quite simple, ascending; scape ^ 

 simple; racemes corymbose; calyx hairy; petals white; 

 siliculai generally hairy, sometimes bald ; hairs very short, 

 forked. 



S. Drala incana, ' Hoary ivhitlow-grass. 



Leaves cauline, many, hoary, slightly toothed; siliculce 

 oblong, bald, twisted. 



Lunaria contorta major, Raii Syn. 291, 1. 

 Draba incana, Lin, S. P. 897. 

 JVreathed cress. 



Limestone rocks ; biennial ; May and June. 



P/g«^ woolly; hairs short, stellate, entangled ; 5/em sim- 

 ple or branched above ; leaves sessile, ovate, ribbed ; calyx 

 hairy; petals nicked; siUculce twisted, bald, with a very 

 short style ; pedicells very short. 



^. minor. Plant small. 



Lunaria q. Paronycbise Birailis sed major, perennis Alpina rcpens, Raii 

 Syn. 292, 2. 



