Arabis. CRUCIFER.E. 31 



above : lower leaves often simple, subcordate-orbicular, 1 to 2i inches broad, 5-7- 

 nerved, repand ; the upper deeply lobed or pinnately 5-foliolate, the leaflets ovate to 

 oblong, more or less irregularly toothed or entire : petals 6 to 9 lines long, white or 

 pinkish : pods 1 to It inches long, as many lines wide, pointed at each end and 

 tipped with a style 1 to H lines long: pedicels spreading, | to 1J inches long. — 

 PI. Hartw. 297. C. purpurea. Torr. & Gray, Fl. i. 667. Dentaria integrifolia & 

 Californica, Nutt. in Torr. & Gray, Fl. i. 88. C. angulata, Torr. in Pacif. E. Hep. 

 iv. 65, &c. 



In the Coast Ranges from San Diego to Mendocino County. Specimens have also been received 

 from the northern Sierra Nevada {Mrs. .-Ivies, Lcmmon, &c. ), which appear to belong to this spe- 

 cies, though in the early state with all the habit of a Dentaria. The tubers, as usual, have a 

 pungent taste, and the leaves are often marked with purple. 



4-. C. Breweri, Watson. Glabrous or slightly pubescent at base : stems from a 

 running rootstock, rlexuous, decumbent at base, 6 to 18 inches high, usually 

 simple : leaflets 1 or 2 pairs, rounded or oblong, the terminal much the largest, i to 

 an inch or more long, entire or coarsely sinuate-toothed or lobed, obtuse, often cor- 

 date at base ; radical leaves mostly simple and cordate-reniform : petals 2 lines long, 

 white : pods 8 to 15 lines long, obtuse or scarcely beaked with a short style, ascend- 

 ing on pedicels 3 to 4 lines long. — Proc. Am. Acad. x. 339. 



In the Sierra Nevada, from Sonora Pass northward (Brewer, Anderson) ; Oregon (Rail), and in 

 the mountains eastward to Wyoming. 



C. axgixata, Hook., and C. cordifolia, Gray, both of tins group, are found in Oregon and 

 may reach the northern limits of the State. The first has tall slender simple stems ; leaves all 

 ternate, the leaflets cuneatc-ovate or -oblong, with 3 or rarely 5 lobes or coarse teeth ; flowers few, 

 white, 3 to 4 lines long, on slender ascending pedicels ; pods short. The latter is stouter, with 

 simple cordate-orbicular or -ovate leaves, the margin sinuate ; flowers white, 4 to 6 lines long ; 

 pods an inch long, attenuate above, on rather short pedicels. This species ranges to Colorado and 

 New Mexico. Both have running rootstocks. 



6. ARABIS, Linn. 



Pod linear, flattened ; valves 1-nerved, not strongly. Seeds in one or two rows, 



flattened and usually winged ; cotyledons accumhent. Sepals short or narrow, 



rarely colored. Petals with a narrow claw and flat blade, white, rose-colored, or 



purple. Anthers short, ovate or oblong, scarcely emarginate at base. Stigma 



entire or somewhat 2-lobed. — Erect, with perpendicular roots, and undivided leaves, 



the cauline sessile and usually clasping and auricled at base. 



A large genus of perhaps 1(10 species, most abundant in Europe and Northern Asia. There 

 are 'J'i i.r more species in North America. 



* Annual: pud reflexed, long-beaked: leaves narrowed at base. 



1. A. longirostris, Watson, (llabrous, glaucous, slender, a foot high or more, 

 branched : radical leaves ovate-spatulate, entire or sparingly toothed ; the cauline 

 linear-lanceolate, an inch long: racemes loose ; flowers small, few, light pink ; petals 

 l. 1 lines long, narrow, a Little exceeding the calyx : pods l ,", to 2 inches long, pen 

 dent on short pedicels; beak 3 lines long, narrow: seeds in one row, narrowly 

 winged. - Bot. King Exp. 17. t. 2. 



_ In alkaline soil in the valleys of N. \V. Nevada, and on the islands in Salt Lake (Watson); 

 S. Utah, Parry: doubtless in Northeastern California. 



* * Biennials: pods straight, strictly erect, narrowly linear : flowers small, white or 



m arly so. 



2. A. perfoliata, Lam. Glaucous: stem stout, usually simple, 2 to I feel high, 

 mostly glabrous but often somewhat hirsute with spreading hairs toward the base: 

 lower leaves spatulate, 2 to I inches long, sinuate-pinnatifid or i lothed, ciliate at 



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