CRDClFERiE. 21 



Pods elliptical, twisted, flat, 2 lines long, 6- lO-aeeded 25 



Poda minute, orbicular, bristly with hooked hairs, 1 -seeded 26 



Pods orbicular or obovate, broadly margined, plano-convex, 1 -seeded. 27 



Poda terete, spongy-intlated, tapering above, an inch or more long 28 



1. PLATYSPERMXTM, Hooker. 

 1. P. scapigenim, Hook. Glabrous, leaves mostly runcinately lobed. S. N. Mt«. 



2. ALYSSUM, Tournefort. 



1. A. calycinum, L. Petals white or yellowish: sepals persistent: pods ^-seeded. 



2. A. maritimmn, L. Petals white: pods 2-8eeded (known aa Sweet Alyssum). 



8. DRAB A, Linnsens. 

 Stems leafy. Nos. 1 to 4. Stems scape-like, few-flowered, not annuals. Noa. 5 to 10. 



1. D. cuneifolia, Nutt. Hirsute, 1 to 6 inches high: petals white, 1 or 2 lines long, 



2. D. stenoloba, Ledeb. Larger, montane or alpine: petals yellow, obtuse. 



3 D. aureola, Watson. Densely stellate-hairy: raceme dense: petals yellow. 



4. D, corrugata, Watson. Pubescence coarser: racemes looser: pod contorted. 



5. D. crassifolia, Graham. Glabrous: yellow petals a line long: pods acute. 



6. D. Douglasii, Gr. Glaucous: scapes 6 to 18 lines long: petals white. 



7. D. Lemmom, Wats. Stout caudex branching: scapes an inch high: petals yellow. 



8. D. eurycarpa, Gr. Pod ovate, beaked, 5 to 10 lines long. Sonora Pass. 



9. D. alpina, L. Petals yellow, 1^ to 2^ lines long. Alpine, 



10. D. Howellii, Watson. Similar: petals 3 or 4 lines long: pods often one-sided. 

 N.W. Cal. 



4. DENTABIA, Linnseua. 



1. D. tenella, Pursh. Leaves 1 to 3, 2-5-parted: flowers 3 to 6 lines long. 



2. D. Califomica, Watson. Leaves 2 to 4, toothed, rarely 3- lobod: petals rose-colop. 



6. CARDAMINE, Linnaeus. 



Leaves pinnate with several pairs of small leaflets. . . 1, 2, 8 



Leaves pinnate with larger leaflets, or simple. 



Radical leaves 5-7-foliolate; stem leaves with 5 to 9 entire leaflets....... 4 



Eladical leaves mostly simple; stem leaves 3-5-foliolate 6, 6 



Leaves all ternate, the leaflets 3-5-lobed or toothed : tall 7 



Leaves all simple; margin sinuate or entire 8, 9 



L C. Gambelii, Watson. Leaflets 9 to 13, sessile, acute: petals 4 lines long. 



2. 0. oligosperma, Nutt. Leaflets 7 to 11, petiolulate: petals 1 to 1^ lines long. 



3. 0. hirauta, L. Stouter: leaflets sessile: flowers larger in longer racemes. 



