CRUCIFERS. (MUSTARD OR RADISH FAMILY.) 
39 
*tv!e; leaves lyrate or lobed. — Fields and waste places, partly natu¬ 
ralized. The seeds furnish the mustard of our tables. 
I ribe IV. ALYSSfNETE. The Alyssum Tribe. 
11. DRABA, L. Whitlow Grass. 
Pouch oval or oblong, flattened ; the valves flat or slightly con¬ 
vex. Seeds numerous, in 2 rows in each cell, marginless. Calyx 
equal. Filaments not toothed. Low herbs, with entire or tooth¬ 
ed leave*. Flowers white or yellow. (Name from bpdprj, acrid, 
m allusion to the pungency or acridity of the leaves.) 
§ 1- DrA.ba, DC. — Petals undivided. 
1 D. artWsans, Michx. (Rock-cress Whitlow Grass) 
ranched at the base, tufted, leafy ; root-leaves oblanceolate, cluster- 
er.’wtr e n T 8 | ° nS ’ i ® har P'y t00thcd towards the apex; flow- 
with a ? ' h ^ crowded raceme J Pods lanceolate-oblong, tipped 
" f n ol 7 u ££ pedicels, smooth, often twisted 
KK’k I 68 ’ Verm ° nt ’ N ‘ Ncw York - 
,, _ - nt 8 hl S h i w*th conspicuous flowers. 
O'-^U^rS’ ^ (Gbote Wh,tlow Grass.) Low 
dUpti^lTL L* \ CaTCS ° Val ° r lanceol ^e, toothed ; pods 
flower, yellow or whHUh , !!l FortG^t'” “ l ™ S . raCeme ! 
fl'-wer, while, rather conspicuous ® _ S anH fi u c Ped ' Cels 5 
Mand southward. April - J„ ne . _ P f an , from Rhode 
4 D v<*o § . 2 ' E * 6r ‘ n,Li - Petals 2-cleft. 
clustered at Jt*. L”™ Dwarf; .eaves 
*tcnw Mveral, leafless • pods nr„l , ’ sll S hU y toothed, hairy; 
*». COCHLBiB,., Town. 
“l •!■». of ,Z 
, escaped from gardens, scarcely nat- 
