86 CKUCIFER-B. 



Pocia elliptical, twisted, flat, 2 lines long, 6-10-seeded 25 



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



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



Pods terete, spongy-inflated, tapering above, an inch or more long 28 



1. PLATYSPEBMUM, Hooker. 



1. P. scapigenun, Hook. Glabrous; leaves mostly runcinately lobed. S. N. Mta. 



2. ALYSSUM, Tonrnefort. 

 L A. calycinum, L. Petals white or yellowish: sepals persiatent: pods 4-seeded. 



2. A. maritimum, L. Petals white: pods 2-seeded (known as Sweet Alyssum). 



3. DRAB A, Linnaeus. 

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



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



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



3. D. aureola, Watsou. 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. Lemmoni, 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. DENTAHIA, Linnaeus. 



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



2. D. Californica, Watson. Leaves 2 to 4, toothed, rarely 3-lobed: petals rose-color. 



5. CABDAMINE, Linnaeus. 



Leaves pinnate with several* pairs of small leaflets 1, 2, 3 



Leaves pinnate with larger leaflets, or simple. 



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



Radical 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 



1. C. Qambelii, 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. C. hirsuta, L. Stouter: leaflets sessile: flowers larger in longer racemes. 



