CRUCIFEHAK (>rrSTAKD FAMILY) 



421 



Artificial Kky to Gknera 



in diameter . 

 in diameter 



.7.. Petals present, with yellow blade and yellowish or whitish claw b 

 b. Fruit short, not more than 3 times as long as broad. 

 Pubescence stellate. 

 Pods thick. 

 Pods g-lobose. 



Pods dehiscent 



Pods indehiscent 



Pods obovoid 



Pods thin. 



Pods orbicular 



Pods oblong 



Pubescence simple or none. 

 Pods subglobose or cylindrical . 

 Pods ver\' flat and thin . 



b. Fruit much more than 3 times as long as broad 



Pods 1-celled or with spongy cross partitions 

 Pods longitudinally 2-celled. 

 Seeds 2-rowed in each cell 

 Seeds 1 -rowed in each cell. 

 Petals 7-15 mm. long. 

 Pods thickish, '2-Gnim 

 Pods linear, about 1 mm 

 Petals smaller. 

 Stem-hairs vertical, attached by the middle, appressed . 

 Stem-hairs (if present) otherwise. 

 Stem-leaves lanceolate, sessile, subeutii-e ; stem villous at 



base 



Stem-leaves elhptical, sessile, entire : stem glabrous . 

 Stem-leaves petiolate, toothed or pinnate. 



Leaves bipinnatifld 



Leaves simple or pinnatifid. 

 Pods awl-shaped, tapering, closely appressed 

 Pods linear, cylindrical or compressed. 



Pods (when rif»e) 2-5 cm. long 



Pods (when ripe) 7-9 cm. long 



«. Petals (when present) with blade white or purplish (sometimes yellow 

 at the base) c. 



c. Peduncles 1-flowered. radical 



c. Peduncles several-flowered, not radical d. 



d. Dwarf aquatic with awl-shaped entire leaves 



d. Otherwise &. 



e. Fruit transversely 2-celled ; plant fleshy 



e. Fruit longitudinally 2-celled /. 

 /. Pods short, rare!}' 3 times as long as wide g. 



g. Pods compressed contrary to a narrow partition. 



Carpels thickish, tubercuiate-crested or deeply wrinkled 

 Carpels compressed, smoothish. 

 Pods wedge-shaped at the base ; some or all of the hairs 



branched 



Pods, not wedge-shaped at the base ; hairs simple or none. 



Seeds several in each cell 



Seeds solitary in each cell 



g. Pods compressed (if at all) parallel to the broadish partition. 



Pods 2-3 cm. broad 



Pods narrower. 



• Hairs none or all simple 



Hairs at least in part branched or attached by the middle. 

 Hairs vertically 2-forked, appressed, apparently attached 



by the middle 



Hairs otherwise. 

 Seeds 2 in each cell ; pods orbicular .... 

 Seeds several to many in each cell. 

 Petals deeply bifid. 



Scapose, 1 dm. or less high 



Leafy-stemmed, 3-S dm. high .... 



Petals nearly or quite entire 



f. Pods 4-x times as long as wide h. 

 h. Hairs simple or none. 



Leaves palmately di^ided 



Leaves otherwise. 



Fruit thickish, 4-7 mm. in diameter 



Fruit ^lender, 1-3 mm. in diameter. 

 Petals purple or rose-colored. 

 Lateral sei)als with a hump (often tufted) just below 



the summit 



Lateral sepals unappendaged 



5. Lksquereli..\. 

 12. Neslia. 

 11. Cameli.na. 



4. Alyssim. 

 1. Draba. 



23. Eadicula. 



25. Sei.ema. 



1-i. Eapuauus. 



16. DiPLOTAXIS. 



15. Beassica. 



19. SiST.MBEIUM 



22. Erysimcm. 



31. Arabis. 

 17. Coxrixgia. 



19, Sisymbrium. 



19. SiSYMBRIU.M. 



24. Barbarea. 



19. SlSVMKRIl'M. 



28. Leave.vworthia 

 9. Subularia. 

 13. Cakile. 



8. C0RONOPU8. 



10. Capsella. 



G. Thlaspi. 



7. Lepidium. 



27. Lunakia. 



23. Radicula. 



3. Lobularia. 



4. Alyssum. 



1. Draba. 



2. Bertkroa, 

 1. Draba. 



29. Dentaria. 

 14. Raphani's. 



26. lODANTHUS. 



30. Carda.mine 



