x. CRUCIFERJ3. (Hook. f. & T. Anderson.) 129 



Sepals erect, not saccate ; pods flat, strongly nerved ; seeds 



flattened. Flowers white or rose 7. ARABIS. 



Sepals not saccate ; pods of Arabis but hardly nerved, usually 



acute ; stamens simple. Flowers white or purple .... 8. CARDAMINE. 



Sepals spreading, not saccate ; long stamens bent above the 



middle. A minute herb ; flowers few, purple ? 9. LOXOSTEMON. 



*** Valves with horns or appendages. * 



Pods short, valves septate within 10. NOTOCERAS. 



TRIBE II. Alyssinese. Pods short, broad. Seeds usually 2-seriate. 

 Cotyledons accumbent. (Pod sometimes long and seeds 1-seriate in 11, Far- 

 setia, and cotyledons rarely incumbent in 13, Draba. See also 2, Parrya.} 



* Pods ^-celled, many -seeded ; seeds compressed, often winged. 



Pods sessile; seeds 1-seriate 11. FARSETIA. 



** Pods l-2-celled, 2- many-seeded ; valves often tumid; seeds ^-seriate, rarely 

 winged. (Sepals never saccate ; flowers white or yellow.) 



Stamens often appendaged ; pods usually orbicular and 4-seeded. 



Hoary herbs 12. ALYSSUM. 



Stamens not appemlaged ; pods longer than broad, many- seeded. 



Petals entire. Hoary herbs 13. DRABA. 



Characters of Draba but petals 2-fid 14. EUOPHILA. 



Sepals short, spreading. Glabrous herbs "". . 15. COCHLEAKIA. 



TRIBE III. Sisymbrieae. Pods usually sessile, long, narrow. Seeds 

 usually 1-seriate (2 seriate in 19, Eutremd) ; cotyledons straight, flat, in- 

 cumbent. 



* Stigmatic-lobes erect, free, or connate in a cone. 



Pod rigid, terete. Flowers white or purple 16. MALCOLMIA. 



** /Stigma capitate emarginate or shortly 2-lobed. 



Stamens with a broad basal scale 17. LEPIDOSTEMCUS'. 



Sepals erect or spreading ; pod many-seeded, valves 1-3-nerved; 



seeds usually 1-seriate. Hairs simple or 18. SISYMBRIUM. 



Sepals short, erect ; pods terete, valves 1- ribbed ; seeds usually 



2-seriate. Glabrous herbs 19. EUTREMA. 



Sepals long ; pods compressed. Leaves quite entire glabrous 



glaucous 20. CONRINGIA. 



Sepals erect ; valves keeled. Hairs appressed forked . . . .21. ERYSIMDM. 

 Sepals suberect ; pods linear-lanceolate, flattened ; seeds few. 



A fleshy herb 22. CHRISTOLEA. 



TBIBE IV. Camelineee. Pods short or long. Seeds usually 2-seriate ; 

 cotyledons flat, incumbent. (See also 13, Draba.) 



Seeds few, large. Tufted scapigerous herbs 23. BRAYA. 



TRIBE V. Brassiceae. Pods short or long; cotyledons .longitudinally 

 folded or deeply grooved. 



* Stigma capitate, truncate or %-lobed. 



Pods long ; seeds 1-seriate 24. BRASSICA. 



Pods long, compressed ; seeds 2-seriate 25. 



Pods short, turgid, beaked ; seeds 2-seriate 26. ERUCA. 



VOL. L K 



