MUSTARD FAMILY 275 
Pods not hairy. 
Pods) 4-aneleds{) tsane, ).':. '\ ao Barbarea 
Pods rounded, not 4-angled, term- 
inated by a long beak . . Brassica 
Pods hairy . APE Tis Sinapis 
Leaves lance-shaped, not lobed . . . Erysimum 
Flowers, yellow white or purple. 
Seeds in single row in each valve. 
Pods not constricted between the seeds . . Sisymbrium 
Pods constricted between the seeds . . . . Raphanus 
Seeds in two rows in each valve. 
Pods generally an in. or more long . . . Diplotaxis 
Podsslessithan dan long sly). Un Se ReEipa: 
Flowers white or purple. 
Leaves mostly on the stem, not in a whorl at base. Sisymbrium 
Leaves in a whorl on the stem. 
Leaves divided in 3 to 7 radiating divisions or leaflets 
of et ARE EL Pedi SPT Me Me Ot ee coe a ae Dentaria 
Leaves broad, cordate or kidney-formed . . . Alliaria 
Leaves feather-form (pinnate), lobed or ovate Cardamine 
Leaves mostly in a whorl or rosette about the base, hairs when 
present not forked. 
Seed pods quite short but generally with several seeds Draba 
Seed pods linear, hairs simple’ . ... ;: . |. Arabis 
Seed pods linear, hairs forked 
Petals white . . . + . - . Stenophragma 
Hlowers: (purples. 5 36 o.oo At lesperis 
The arrangement of these groups is based upon a few of the more 
general characteristics and does not follow the more technical grouping. 
FIRST GROUP 
Fruit-pod pear-shaped, triangular or oblong, distinctly flattened contrary 
to the partition. 
Flowers white 
1. LEPIDIUM, L. 
Erect or diffused plants with pear-shaped, feather-formed or deeply 
lobed leaves. Pods rounded or pear-shaped, flattened, with two seeds, one 
in each valve of the pod or with only one seed. Stamens sometimes less 
than 6. Flowers small or petals sometimes wanting. 
Stem leaves arrow-formed, clasping with ear-like appendages. 
Pods with a somewhat conspicuous) yslender istylen).) 4 ee arabe 
Pods without the style See rye | Cue com pesive 
Stem leaves, pear-shaped, on long leaf Bales ae 16h ain . L, virginicum 
Pods distinctly pear-shaped . Sid Modis vitae MoO MiR iodo oh vc ocp SALLORE 
Pods oval or orbicular. 
With wings ener a sits ho eteaee Tom Amy” Gewese de® Lick ow tlhe GPEtalumn 
Without wings Maemo eh Peau ken bi. wish s ce umlesemnuaerale 
Stem leaves teather-formed (pinnatifid). 
