Hale 
8. Leaves simple, not deeply divided. 
9, Basal rosettes present. (Lepidium may 
have a false rosette of cauline leaves). 
10. Cauline leaves absent; flowering 
stem a scape. (Also, petals cleft 
to! middle) Reve evaterelsele cl cic ersicicisin messes Draba 
10, Cauline leaves present. 
11. Leaves sagittate at base. 
Expected (Capsella, Arabis). 
11. Leaves not sagittate at base. 
(Also, ovary linear; petals 
spatulate; plant annual with 
slender taproot)......2.)..0cceeees5ee Arabidopsis 
§, Basal rosettes absent. 
12, Plants halophytic, succulent............. Cakile 
12. Plants not halophytic or succulent; 
old-field habitat. 
13. Cauline leaves clasping the stem, 
sagittate. 
14, Ovary notched at summit; style 
absent or very short. 
15. Plant pubescent; petals 1.5 
MMs LONG sieeve cr ciersie)s eleielesclee ere Ue DA GTUM 
15. Plant glabrous; petals 2-4 
mm. long. Expected (Thlaspi). 
14. Ovary not notched, but subglobose 
or cordate; style filiform. 
Expected (Cardaria). 
13. Cauline leaves not clasping. 
16. Ovary short, lanceolate to ovate; 
petals 1 to 2 mm. long or 
ADSENE se cic ersle oyeie' ee c/eleicjeseserereee,euele/ CDG Tum 
16. Ovary long, linear or 
cylindric. 
