CRUCIFERAE (MUSTARD FAMILY) 



6 a Flowers ^4 in. or less broad 7 



b Flowers usually V2 in. or more broad 9 



7 a Basal leaves with terminal lobe only i or 2 times larger 



than the lower lateral ones 9. Roripa. p 158 



b Basal leaves with terminal lobe several times larger 



than the lateral ones 8 



8 a Leaves dark green, often shining; flowers usually num- 



erous and conspicuously clustered at top of stem 



8. Barbarea. p 158 

 b Leaves green and not shining; flowers % in. or less 



broad, not completely as in a .... 3. Sisymbrium. p 757 

 c Leaves sometimes glaucous, not shining; flowers ^i- 1 /^ 



in. broad 6. Brassica. p 158 



9 a Pods 1 A in. or more thick, constricted between the seeds, 



spongy 7. Raphanus. p 158 



b Pods not completely as in a 10 



10 a Pod with the beak or tip flattened, sword-shaped, as 



long as pod 5. Sinapis. p 158 



b Pod with the beak or tip conic, not sword-shaped 



6. Brassica. p 158 



11 a Flowers usually V-2 in. or more broad 12 



b Flowers about % in. or less broad 19 



12 a Leaves palmately divided into 3-5 leaflets 



n. Dentaria. P 159 

 b Leaves not palmately divided 13 



13 a Some or all of leaves lobed or divided 7. Raphanus. p 158 

 b None of the leaves lobed or divided 14 



14 a Leaves broadly ovate-heart-shaped, 3-6 in. long; flowers 



purple 22. Lunaria. p 160 



b Leaves not completely as in a 15 



15 a 2 outer petals much larger than the 2 inner ones 



25. Iberis. p 160 

 b All petals about the same size 16 



16 a Wild herbs with a bulbous base; flowers white, about 



y% in. broad 10. Cardamine. p 159 



b Plants not completely as in a 17 



17 a Plant 2-8 in. high; leaves %-2 in. long 16. Arabis. p 159 

 b Plant 1-2 ft. high 18 



18 a Leaves toothed; plant not hoary.... 21. Hesperis. p 159 

 b Leaves entire ; plant covered with hoary hairs 



23. Matthiola. p 160 



19 a 2 outer petals much larger than the 2 inner ones 



25. Iberis. p 160 

 b All petals about the same size 20 



20 a Fleshy, prostrate herb growing on sea-beaches ; pods 



jointed 4. Cakile. p 158 



b Plants not completely as in a 21 



156 



