466 



BEASSICACEAE 



colored hypogynous petals in a single series, or wanting, the spreading blades 

 forming a cross. Androecium of 6 (or rarely 2 or 4) didynamous stamens, the 

 2 outer ones lateral, opposite the inner sepals, the other 4 longer, almost oppo- 

 site the petals. Filaments often dilated or toothed towards the base. Anthers 

 mostly 2-celled, opening lengthwise. Receptacle with honey glands. Gynoecium 

 of 2 lateral united carpels. Ovary 2-celled, or rarely 1-celled, or falsely several- 

 celled, superior cavities sometimes superposed. Style simple or wanting. 

 Stigma terminal, depressed or 2-lobed. Ovules horizontal or pendulous, or when 

 solitary erect. Fruit capsular, elongated (silique) or relatively short and broad 

 (silicle), valved, or rarely indehiscent, terete, angled or variously flattened. 

 Seeds without endosperm. Embryo usually curved. Cotyledons accumbent, 

 incumbent or conduplicate. [CRUCTFERAE B. Juss.] 



Pods not stipitate. 



Pods flattened or compressed contrary to the narrow partition. 



Pods didymous, separating from the partition as 2 plump nutlets. 1. CORONOPUS. 



Pods flat, regularly dehiscent. 



Pods cuneate, wingless. 2. BTJRSA. 



Pods orbicular to elliptic or obovate, wing-margined at least at the apex. 



Pods orbicular or obovate : seeds 1 or 2. 3. LEPIDIUM. 



Pods elliptic-oblong : seeds several. 4. SYNTHLIPSIS. 



Pods neither compressed nor flattened contrary to the partition. 

 Pods terete or prismatic. 

 Pods regularly dehiscent. 



Length of pod less than twice the width. 



Seeds flat : plants pubescent with mostly branched hairs. 



Pods globular, the valves nerveless : cotyledons accumbent. 5. LESQTJERELLA. 

 Pods pyriform, the valves 1-nerved : cotyledons incumbent. 6. CAMELINA. 

 Seeds turgid : plants pubescent with simple hairs, or glabrous. 7. RORIPA. 



Length of pod over twice the width. 



Pods merely tipped with the short style, or style wanting, not beaked . 

 Pods terete or nearly so. 



Seeds in 2 rows in each cavity of the pod. 7. RORIPA. 



Seeds in 1 row in each cavity of the pod. 

 Leaf-blades pinnatifid or coarsely toothed. 



Outer sepals not horned : corollas yellow or white. 8. SISYMBRIUM. 



Outer sepals horned : corollas violet or purple. 9. IODANTHUS. 



Leaf-blades entire or slightly toothed. 



Stigmas discoid, barely lobed. 10. THELYPODIUM. 



Stigmas manifestly 2-lobed. 11. HESPERIS. 



Pods 4-sided or 4-angled. 



Corolla white. 12. STENOPHRAGMA. 



Corolla yellow. 



Seeds flat : leaf-blades pinnatifid. 13. BARBAREA. 



Seeds plump : leaf-blades entire or toothed. 14. ERYSIMUM. 



Pods markedly beaked. 



Beak flat and sword-like. 15. SINAPIS. 



Beak conic. 16. BRASSICA. 



Pods with transverse partitions, separating into joints. 17. CAKILE. 



Pods flattened or compressed parallel to the broad partition. 



Pods suborbicular or oval. 18. KONIGA. 



Pods oblong to narrowly linear. 

 Valves of the pods nerveless. 

 Seeds wingless. 



Seeds in 2 rows in each cavity. 19. DRABA. 



Seeds in 1 row in each cavity. 



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



embryo with unequal cotyledons. 20. DENTARIA. 



Caulescent, with alternate leaves : embryo with equal cotyle- 

 dons. 21. CARDAMINE. 

 Seeds winged. 22. LEAVENWORTHIA. 

 Valves of the pods nerved. 

 Anthers not sagittate. 



Leaf-blades entire or merely toothed. 



Pods oval, oblong to broadly linear. 19. DRABA. 



Pods narrowly linear to linear-filiform. 23. ARABIS. 



Leaf-blades finely dissected. 24. SOPHIA. 



Anthers sagittate. 



Petals with blades much wider than the claws : calyx not cam- 

 panulate. 



25. STREPTANTHUS. 



26. EUKLISIA. 



27. SELENIA. 



28. WAREA. 



Petals with narrow blades scarcely wider than the claws : calyx 



campanulate. 

 Pods stipitate. 



Leaf-blades pinnatisect : pods oblong : seeds in 2 rows in each cavity. 

 Leaf-blades entire : pods narrowly linear : seeds in 1 row in each cavity. 



1. CORONOPUS Gaertn. 



Annual or biennial caulescent herbs. Stems branched at the base, the branches dif- 

 fusely spreading. Leaves alternate : blades entire or pinnatifid. Flowers perfect, in small 



