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BRASSICACEAE 



rarely 1-celled, 2-valved or rarely indehiscent. Endosperm none ; cotyledons incum- 

 bent, accumbent or conduplicate. 



A family of about 200 genera and 1800 species, of wide geographical distribution. Also called the 

 Cruciferae. 

 Pubescence when present of simple, unbranched hairs, except in some genera of the Sisymbriinae. 



Stigma lobes situated over the valves; anthers sagittate at base; pods linear, elongated, sessile or stipitate. 

 (Tribe Thelypodieae.) 

 Pods long-stipitate; stamens well exserted, beyond the petals. I. Stanleyinae. 



Pods sessile or subsessile. II. Thelypodiinae. 



Stigma lobes situated over the placentae; anthers not sagittate at base; pods of various shapes. (Tribe 

 Sinapeae.) 

 Pods of various forms, seldom over twice as long as wide (silicles). 



Silkies globose or oblong, scarcely or not at all compressed. See also genus no. 9, Hymenophysa. 

 Leaves subulate; aquatic plants. III. Subulariinae. 



Leaves not subulate. V. Cochleariinae. 



Silicles strongly compressed at right angles to the narrow partition, except in Hymenophysa. 

 Pods dehiscent. IV. Lepidiinae. 



Pods indehiscent. VIII. Isatidinae. 



Pods linear, except Idahoa, over 3 times as long as wide, or if shorter prominently beaked (silique). 

 Siliques conspicuously beaked. 



Pods transversely 2-jointed, the upper joint at length deciduous. VII. Cakilinae. 

 Pods not transversely 2-jointed. 



Pods 2-celled by a thin longitudinal partition; dehiscent by valves. 



IX. Brassicinae. 



Pods indehiscent, 1-celled, the spaces between the seeds filled with spongy tissue. 



X. Raphaninae. 

 Siliques merely tipped by the short style or sessile stigma. 



Pods terete or 4-angled, not flattened parallel with the partition; cotyledons incumbent. 



VI. Sisymbriinae. 



Pods flattened parallel with the partition; cotyledons accumbent. XI 



Pubescence when present of stellate or forked hairs. See also Sisymbriinae. 

 Stigma lobes situated over the valves. (Tribe Schizopctaleae.) 



Flowers in the axils of the leaves on the upper part of the stem. XII 



Flowers in terminal leafless racemes. XIII 



Stigma lobes situated over the placentae. (Tribe Hesperideae.) 

 Pods not linear, seldom over twice as long as wide. 



Pods flattened contrary to the partition or turgid. XIV 



Cardamininae. 



ScHIZOPETALINAE. 



Physariinae. 



Pods flattened parallel to the partition. 

 Pods narrowly linear, over three times as long as wide. 

 Epidermal cells of the partition wall not reticulate. 



Petals with lateral and one median nectary. 



Petals with lateral and two median nectaries. 

 Epidermal cells of the partition wall reticulate. 



Flowers purple; plants stellate-pubescent, in our species. 



Flowers yellow; plants glabrous, in our species. 



I. Stanleyinae. 



Sepals reflexed or spreading in anthesis; anthers spirally coiled. 



Sepals erect or ascending in anthesis; anthers strongly recurved but not spirally coiled. 



II. Thelypodiinae. 



Calyx not urn-shaped. 



Pods terete or 4-sided; seeds not winged. 

 Anthers curved or twisted. 

 Anthers neither curved nor twisted. 

 Pods flattened parallel with the partition; seeds usually winged. 

 Anthers curved and twisted; petals narrow, usually crisped. 

 Anthers neither curved nor twisted; petals not crisped. 

 Calyx urn-shaped, the sepals curved inward. 



Capsellinae. 

 XVII. Alyssinae. 



XV. Turritinae. 

 XVI. Erysiminae. 



XVIII. Hesperidinae. 

 XIX. Moricandiinae. 



1. Stanleya. 



2. Chlorocrambe. 



III. Subulariinae. 

 IV. Lepidiinae. 



Represented by the single genus. 



Pods inflated, tardily dehiscent. 

 Pods strongly compressed. 



Pods smooth and glabrous or pubescent. 



Pods rugose-reticulate or tuberculate. 



V. Cochleariinae. 



Pods strongly flattened contrary to the partition, crested and winged. 



Pods subglobose, only slightly compressed contrary to the partition, not winged. 



VI. Sisymbriinae. 



Pubescence of simple hairs. 

 Pubescence of forked hairs. 

 Pods terete. 



Leaves entire or toothed; styles nearly as broad as ovary. 

 Leaves finely pinnate; styles much narrower than ovary. 

 Pods 4-sided; leaves lobed or pinnatifid. 



3. Thelypodium. 



4. Schoenocrambe. 



5. Streptanthus. 



6. Streptanthella. 



7. Caulanthus. 



8. Subularia. 



9. Hymenophysa. 



10. Lepidium. 



11. Coronopus. 



12. Thlaspi. 



13. Cochlearia. 



14. Sisymbrium. 



15. Arabidopsis. 



16. Halimolobus. 



17. Descurainia. 



