Arabis. 



CRUCIFEII.E. 



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

 nerved, repand ; the uj)per deeply lobed or pinnately 5-foliulate, the leaflets o'vate to 

 oblong more or less irregularly toothed or entire : petals 6 to 9 lines Ion" wliite or 

 pinkish : pods 1 to li inches long, as many lines wide, pointed at each end an.l 

 tippe.1 with a style 1 to 11 lines long: pedicels spreading, i to U inches lon-'.- 

 1 1 Hartw. 297 C. purpurea, Torr. & Gray, Fl. i. 6G7. Dentaria integrifolia Sc 

 Cabformca, Nutt. in lorr. & Gray, Fl. i. 88. C. anrjulata, Torr. in Pacif. li Rep 

 IV. 6o, &c. ^ ■ 



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

 from the northern Sierra Nevada (Mrs. Avies, Lemvion, kc), which appear to belon- to this sne 

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

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



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

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

 simple : leaflets 1 or 2 pairs, rounded or oblong, the terminal much tlie hirgest, 1 to 

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

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

 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 (Hall), and in 

 the mountains eastward to Wyoming. 



C. ANGULATA, Hook., and C. cordifolia. Gray, both of this group, are found in Ore^^on and 

 may reac'h the northern limits of the State. The first has tall slender simple stems ; le° ves all 

 ternate, the leaflets cuneate-ovate or -oblong, with 3 or rarely 5 lobes or coarse teeth ; Howers 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 l.^u" ; 

 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 accumbent. 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 100 species, most abundant in Europe and Northern Asia There 

 are 20 or more species in North America. 



=.^ Annual: pod reflexed, long-beaked : leaves narrowed at base. 



1. A. longirostris, Watson. Glabrous, 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 

 11 hues long, narrow, a little exceeding the calyx : pods l.V to 2 inches lomr, pen- 

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

 winged. — ■ Bot. King Exp. 1 7, t. 2. 



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

 b. Utah, Parry : doubtless in Northeastern California. 



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



nearly so. 



2. A. perfoliata, Lam. Glaucous : stem stout, usually simple, 2 to 4 feet high, 

 mostly glabrous but often somewhat hirsute with spreading liairs toward the b:u,e : 

 lower leaves spatulate, 2 to 4 inches long, sinuate-pinnatifld or tootlied, ciHate at 



