flail 
CRUCIFERAE 
1: Petals yellow or orange. 
2. Leaves all simple, not deeply divided. Expected 
(Erysimum, Rorippa, Conringia, Camelina). 
2. Leaves, at least the lower, deeply divided, lyrate, 
or pinnate. ; 
3. Petals 1 to 2 cm. long. Expected (Raphanus, 
Brassica). 
3. Petals .5 to 10 mm. long. 
4. Cauline leaves clasping the stem by pinnati- 
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4, Cauline leaves not clasping, or if so their 
bases entire or shallowly dentate. 
5. Sepals erect at anthesis; petals 6 to 10 m. 
long; ovary and fruit beaked. Expected 
(Brassica). 
5. Sepals spreading at anthesis; petals 
shorter; ovary and fruit beakless. 
6. Dry habitat; sepals and ovary linear. 
(Also, terminal segment of the pinnat- 
ifid cauline leaves bluntly to sharply 
serrate; flowers pale yellow).......... Sisymbrium 
6. Damp to aquatic habitat; sepals and 
ovary ovate to elliptic. Expected 
(Rorippa). 
1. Petals white, purple, or pink. 
7. Petals purple to pink; leaves palmately 
3-divided; plant perennial with fleshy rhizomes; 
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7. Petals white; leaves simple or pinnate; plant usually 
annual or biennial without rhizomes; roadside and 
field habitat. (Raphanus, above, may have whitish to 
pale purple petals, lyrate leaves). 
