, CRUCIFERiE. 21 



Pods 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-convex, 1-seeded 27 



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



1. PLATYSPEBMUM, Hooker. 

 1. P. scapigerum, Hook. Glabrous, leaves mostly runcinately lobed. S. N. Mts. 



2. ALYSSUM, Tournefort. 



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



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



3. DKABA, Linn^us. 

 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. 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, ^-raham. 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 limes 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. DENTARIA, 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. CARDAMINE, Linnaeus. 

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



Leaves pinnate with larger leaflets, or simple 



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



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



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



Leaves all simple; margin sinuate or entire 8, 9 



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



2. C. oligrosperma, Nutt. Leatlets 7 to 11, petiolulate: petals 1 to 1^ lines long. 



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



