158 CRUCIFERiE. Cardamine. 



Vax. occidentalis, Watson, n. var. A stout leafy form, with small flowers (2 Hues 

 long), fruiting freely. — Sauvies Islaml aud Oregon City, Oregon, /loivell, Henderson. 

 Specimen:? from Eagle aud Washoe Valleys, Nevada, Stretch, have blunt styleless pods 18 

 Hues loug, aud are perhaps distiuct. 

 C. Gambelii, Watson. Kather stout and tall (2 or 3 feet high) but lax, decumbent at base 

 aud rooting at the lower joints, glabrous or sparingly soft-\nllous, branched : leaflets 4 to 6 

 I)airs, ovate-oblong to linear, usually cuneate at base and acute, mostly few-toothed, rj to 1 

 inch long : raceme nearly sessile, becoming elongated : flowers white, 3 or 4 lines long ; 

 pedicels slender, divaricate, equalling the narrow erect or ascending often curved pod (6 to 12 

 lines Kmg) : stvle slender, a Hue long. — Troc. Am. Acad. xi. 147, & Bot. Calif, j. 30 (where 

 by error Gambellii). C. Schaffneri, Hook, f in Hemsl. Diag. PI. Nov. i. 2, & Biol Cent.- 

 Am. Bot. i. 32. — S. California from San Bernardino to Santa Barbara, in swamps and 

 ditches. (Mex.) 



-1— -I— Flowers smaller: petals a line or two in length. 

 ++ Capsule mostly 20-30-sceded. 

 C* hirsuta, L.^ Low, 3 to 8 or 10 inches high ; root single, very slender and with or without 

 long filiiorm branches : leaves chiefly basal and persisting in a rosulate cluster : leaflets 

 roundish in outline, undnlately few-lobed, appressed-hispidulous above ; those of the few 

 cauline leaves oblong : flowers small : petals white, once and a half to twice the length of 

 the sejials : stameus 4 : pods erect on nearly erect or even appressed ])edicels. — Spec. ii. 

 655 ; DC. Syst. ii. 659 ; Reicheub. Ic. Fl. Germ. ii. t. 26 ; Brittou, Bull. Torr. Club, xix. 

 219. — Woods, Middle Atlantic States from S. Pennsylvania, Small, toN. Carolina, T. J. 

 Browne. Abundant about Washington, D. C. ; perhaps introduced ; fl. April, May. 

 C* parviflora, L. Very slender, glabrous or sparingly pubescent upon the stem, subsimple, 

 erect or nearlv so : root at first single, becoming a fascicle of delicate fibres : stem often 

 somewhat flexuous, 6 or 8 inches high, leafy : leaflets small ; those of the lower leaves oblong 

 (rarely suborbicular), of the upper linear, very narrow; flowers as in the preceding, but 

 petals" mostly narrower and relatively longer : stamens normally 6 : pods erect upon spread- 

 ing-ascending pedicels. — Syst. Nat' ed. 10, 1131, & Spec. ed. 2, ii. 914; DC. 1. c. 261; 

 Reicheub. 1. c. ; Britton, 1. c. 220. C. Virginica, Michx. Fl. ii 29, not L. C. hirsuta, var. 

 sijlcatica, of Am. authors, not C. sylvatica, Link. C Jle.vuosa, Britton, Trans. N. Y. Acad. 

 Sci. ix. 9. C. arenkola, Britton, Bull. Torr. Club, xix. 220.— Sandy and rocky soil, E. 

 New England to Georgia and across the continent to Oregon. In moist situations becom- 

 ing stouter and jierhaps passing to the usually w^ell marked 

 C.* Pennsylvanica, Muhl. Larger, a foot or two in height, more leafy, branching and of 

 laxer growth, nearly or quite glabrous : roots a fascicle of numerous slender fibres : leaflets 

 of the lower leaves roundish or short-oblong ; of the upper oblong, with rounded apex aud 

 narrowed base, commonly more or less decurreut upon the rhachis, usually half inch or 

 more ivi length and I to 3 lines in breadth : flowers as in the last : stamens 6 : pods suberect 

 upon ascending and more or less spreading pedicels. — Muhl. in Willd. Spec. iii. 486 ; DC. 

 1. c. 258 ■ Ell. Sk. ii. 144 ; Britton, 1. c. 219. C. hirsuta, of authors, as to Am. pi. iu great 

 part, not L. C. flexuosn, Britton, Mem. Torr. Club, iv. 103, if correctly shown by Mr. 

 Small's specimen from Mt. Rogers, Va., appears to be a form of the same species with some- 

 what more spreading pods. — Moist places, chiefly iu shade, Newfoundland to Florida aud 

 acro.ss the continent to Central California and north to Alaska ; common ; fl. according to 

 locality from April to July. Var. Brittoniana, 0. A. Farwell (Asa Gray Bull. uo. 7, 46 ; the 

 measurements obviously incorrect), if of this species, must be an exceptional form, witli 

 lateral leaflets few, reduced, or obsolete. — N. Michigan. 



++ ++ Capsule fewer (8-20 J-.'^eedcd: western species. 

 C. Oligosperma, Nutt. Annual, rarely sending out roots at the lower joints, slender, 

 hirsute or nearly glabrous, a foot high or less : leaflets small, petiolulate, roundish, often 3-5- 

 lobed or -toothed, in the upper leaves sometimes narrower : raceme usually few-flowered and 

 shortlv pedunculate- flowers small (1 line long), white: pods erect, 6 to 10 lines long, 8-20- 

 seeded ; style very short. — Nutt. in Torr. & Gray, Fl. i. 85 ; Brew. & Wats. Bot. Calif, i. 

 30. — From Central California to Vancouver Island, in low wet places. 



1 Dr. Watson's description of this species has been revised to exclude the two following, which, 

 althousili very nearly related, generally appear distinct, as recently pointed out by-Dr. Britton, 



