30 CRUCIFERJE. Dentaria. 



A genus of about half a dozen North American species, and as many more of Europe and 

 Northern Asia. Referred to Cardamine by Bentham & Hooker, but of peculiar habit and more 

 conveniently kept distinct. 



1. D. tenella, Pursh. Eootstock interrupted, of elongated and somewhat scaly 

 joints : stem 6 to 10 inches high, with a pair of leaves (rarely 1 or 3) near the top, 

 which are often puberulent, shortly petioled, palmately or pinnately 2 5-parted ; 

 the lobes narrowly oblong or linear, to 1 inch long, obtuse, often mucronate, 

 entire or in the lower leaf rarely sinuate ; radical leaves- said to be simple, roundish, 

 about 5-lobed : flowers white or rose-colored, 3 to 6 lines long, on slender pedicels : 

 fruit unknown. Torr. & Gray, Fl. i. 87. D. temtifolia, Hook. Fl. i. 46, not Led. 



Indian Valley, Plumas Co., Mrs. M. E. Pidsifer Ames. Northward to Vancouver Island and 

 Lower Fraser River, Menzies, Nuttall, Lyall. 



D. MACROCARPA, Nutt., of Oregon, is only known from Nuttall's description, drawn from a 

 single specimen. It is described as having a tuberous root, the radical leaf witli 3 reniform lobed 

 leaflets ; cauline leaf 3-parted, the segments entire, obtuse ; pod very long, with cuspidate style 

 and capitate stigma. 



5. CARDAMINE, Linn. 



Pod linear, with somewhat thickened margins, merely pointed or beaked above ; 

 valves flat, nerveless. Seeds in one row, somewhat flattened, wingless ; cotyledons 

 flat, accumbent. Sepals equal. Petals white or purplish. Mostly perennials, grow- 

 ing in moist or wet places, usually with running rootstocks or small tubers ; stems 

 leafy ; leaves (in our species) all petioled, simple or pinnate ; raceme elongated. 



A rather large genus, inhabiting the temperate and cooler regions of all quarters of the 

 globe. 



* Leaves pinnate with several pairs of small leaflets. 



1. C. G-ambelii, Watson. Perennial, glabrous throughout, erect, about a foot 

 and a half high : leaflets 4 to 6 pairs, ovate-oblong to linear, sessile, entire or spar- 

 ingly toothed, acute, 3 to 12 lines long : flowers white, on slender pedicels : petals 

 4 lines long, twice longer than the sepals : pods narrowly linear, ascending, an inch 

 long, equalling the strongly deflected pedicels : beak slender, a line long. Proc. 

 Am. Acad. xi. 147. 



Collected near Santa Barbara by Gambcl, and recently by Dr. J. T. Rothrock, of Lieut. G. M. 

 Wheeler's Survey, in the same region. It much resembles C. pratensis, Linn., a species confined 

 to colder northern latitudes, ranging from the northern border States to the Arctic Ocean, but 

 differs especially in the sessile leaflets and in the divaricate pedicels, which are horizontal or even 

 more reflexed. A very similar form, but somewhat pubescent, has been collected by Bounjcau 

 near the city of Mexico. 



2. C. oligosperma, Nutt. Annual, somewhat hairy or very nearly glabrous : 

 steams weak and slender, 3 to 10 inches high : leaves all pinnate ; leaflets small, 3 

 to 5 pairs, roundish, 1 to 6 lines in diameter, often obtusely 3 5-lobed, petiolulate : 

 petals white, 1 to 1| lines long, twice longer than the calyx : pods few, somewhat 

 approximate, 6 to 9 lines long by half a line broad, attenuate into the short style, 

 erect ; cells about 8-seeded. Torr. & Gray, Fl. i. 85. 



In shaded places from the lower Sacramento to Fraser River ; perhaps also to Sitka. 



C. HIRSUTA, Linn., which is common from Oregon northward to Alaska and eastward across 

 the continent, may be found in Northern California, especially the more slender var. SYLVATICA, 

 Gray. It may be known from the last by its rather stouter habit, leaflets sessile and larger and 

 usually more or less oblong, flowers a little larger, and pods in a longer raceme, narrower, and 

 with more numerous seeds. 



* * Leaflets few, larger : perennials, usually smooth. 



3. C. paucisecta, Benth. Smooth or slightly pubescent : stems from small 

 deep-seated tubers, rather stout, erect, 10 to 18 inches high, simple or branched 



