, X. CKUCIFEK^. (Hook. f. & T. Anderson.) 129 



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

 flattened. — Flowers white or rose , ... 7. Aeabib. 



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

 acute ; stamens simple. — Flowers white or purple .... 8. Cakdamihe. 



Sepals spreading, not saccate ; long stamens bent above the 

 middle. — A minute herb ; flowers few, purple , ' ? 9. Loxostemon. 



*** Vaives with horns or appendages. 



Pods short, valves septate within 10. Notooekas. 



Teibb II. Alyssineae, Pods, short, broad. Seeds usually 2-seriate. 

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

 s«<w, and cotyledons rarely incumbent in 13, Draba. See also 2, Farrya.) 



* Pods %ceUed, many-seeded; seeds compressed, often winged. 



Pods sessile; seeds 1-seriate 11. Faesetia. 



** Pods \.-%celled, 2- ma.ni/rseeded ; valves often tumid; seeds 2-seriate, rarely 

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



Stamens often appendaged ; pods usually orbicular and 4rseeded. 



—Hoary herbs 12. Altsshm. 



Stamens iiot appendaged ; pods longer than broad, many-seeded. 



Petals entire. — Hoary herbs 13. Dkaba. 



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



Sepals snort, spreading. — Glabrous herbs 15. Cochlbaeia. 



Teibb IIL Sisymbrieae. Pods usually sessile, long, narrow. Seeds 

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

 cumbent. 



* Stigmaiic-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. Lepidostemok. 



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



seeds usually 1-seriate.— Hairs siaiple or 18. Sistmbeicm. 



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



2-8eriate.— Glabrous herbs 19. Edteema. 



Sepals long; pods compressed. — Leaves quite entire glabrous 



glaucous ■ 20. CONKINQIA. 



Sepals erect ; valves keeled. — Hairs appressed forked . . . . 21. Ektsimum. 

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

 A fleshy herb .22. Chbjstolba. 



Tbibe IV. Camelineee. Pods short or long. /S'eec?s usually 2-seriate j 

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

 Seeds few, large. — Tufted scapigerous herbs 23. Beata. 



Tribe V. Brasslceae. /"oc^s short or longj cotyledons .longitudinally 

 folded or deeply grooved. 



* Stigma capitate, truncate or 2-lobed. 



Pods long ; seeds 1-seriate 24. Bbassica. 



Pods Ibng, compressed ; seeds 2-seriate 25. DiPLOTAXis. 



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



VOL. I. K 



