CRUCIFERAE 147 



Pods regularly dehiscent. 



I,ength of pod less than twice the width. 

 Seeds flat : plants pubescent with mostly branched hairs. 



5. Camelina. 

 Seeds turgid : plants pubescent with simple hairs or glabrous. 



6. RORIPA. 



Length of pod over twice the width. 

 Pods merely tipped by the short style or st5'le wanting, not beaked. 

 Pods terete or nearly so. 



Seeds in 2 rows in each cavity of the pod. 6. Roripa. 

 Seeds in i row in each cavity of the pod. 

 Leaf -blades pinnatifid or coarsely toothed. 



Outer sepals not horned : corolla yellow or white. 



7. Sisymbrium. 

 Outer sepals horned : corolla violet or purple. 



8. lODANTHUS. 



Leaf-blades entire or slightly toothed. 9. Hesperis. 

 Pods 4-sided or 4-angled. 

 Corolla white. 10. Stenophragma. 



Corolla yellow. 

 Seeds flat : leaf -blades pinnatifid. 11. Barbarea. 



Seeds plump : leaf-blades entire or toothed. 



Leaf-blades narrow : plant pubescent. 12. Erysimum. 

 Leaf-blades cordate-clasping : plant glabrous. 



13. CONRINGIA. 



Pods markedly beaked. 



Beak flat and sword-like. 14. Sinapis. 



Beak conic. 15. Brassica. 



Pods indehiscent. 

 Pods elongated, transversely jointed or constricted between the seeds, 

 the valves not reticulated. 

 Pods not transversely jointed, merely constricted between the seeds. 



16. Raphanus. 

 Pods transversely jointed, separating into 2 parts. 

 Lower joint of the pod seedless or 2-4-seeded : cotyledons con- 

 duplicate. ' 17. Rapistrum. 

 Lower joint of the pod i-seeded : cotyledons accumbent. 



18. Cakile. 

 Pods globular, the valves reticulated. 19. Neslia. 



>. Pods flattened or compressed parallel to the broad partition. 

 Pods suborbicular, or oval. 



Corolla yellow. 20. Alyssum. 



Corolla white. 



Petals entire. 21. Koniga. 



Petals cleft. 22. Berteroa. 



Pods oblong to narrowly linear. 

 * Valves of the pods nerveless. 



Seeds in 2 rows in each cavity. 23. Draba. 



Seeds in i row in each cavity. 

 Caulescent, with alternate leaves : embryo with equal cotyledons. 



24. Cardamine. 

 Scapose, with 2-4 leaf-like bracts subtending the peduncle : em- 

 bryo with unequal cotyledons. 25. Dentaria. 



