58 CRUCIFER^E. THELYPODIUM. 



Cotyledons more or less oblique. 



T. Howellii Watson Proc. Am. Acad. xxi, 445. Glabrous and glau- 

 cous but the base of the stem and the radical leaves villous with spreading 

 hairs: stems erect, slender, sparingly branched or simple, 6-18 inches 

 high from an annual or biennial root : radical leaves numerous in a rosu- 

 late tuft, oblanceolate, obtusish, coarsely toothed or pinnatifid, narrowed 

 at the base, an inch or two long; cauline leaves linear-lanceolate attenu- 

 ate, sagittate, auriculate erect and usually appressed, 6-12 lines long: 

 racemes rather short and loose, the flowers scattered and ascending on 

 short pedicels ; sepals oblong 2-3 lines long the lower pair distinctly sac- 

 cate at base: petals narrow, crisp twice as long as the sepals: pods ascend- 

 ing 12-15 lines long, slender beaked. In grassy meadows Harney valley 

 Oregon and at Camp Polk on the eastern base of the Cascade Mountains. 



T. eucosmum Robinson in Gray Syn. Fl. i, 175. Glabrous, stems as- 

 cending from an annual or biennial root 6-18 inches high, freely branch- 

 ing: lower leaves ovate, long petioled; cauline leaves oblong or lanceolate* 

 entire spreading, 1-3 inches long: racemes very-many-flowered; flowers 

 deep purple usually horizontal on spreading pedicels 2-3 lines long : petals 

 spatulate4 lines long : pods arcuate ascending 1-2 inches long : mature fruit 

 not known. On moist slopes of the Blue Mountains at Baker City, R. I). 

 Nevius, and near Canyon City Oregon, HowelL 



T. flexuosum Robinson 1. c. Stems slender weak and subdecumbent, 

 flexuous, nearly naked above : radical leaves numerous lanceolate, includ- 

 ing the slender petiole 3-6 inches long: cauline leaves distant, all or at 

 least the upper much reduced, linear-oblong or lance-linear with narrow 

 acutish auricles : racemes rather loose and somewhat few-flowered ; flow- 

 ers usually horizontal on short pedicels; petals* spatulate, 3-4 lines long, 

 usually pale : pods arcuate ascending 1-3 inches long. . In alkaline soil 

 among "Sage brush," etc. Harney valley southeastern Oregon, H^ ivell, 

 to Nevada and California. 



T. Nuttallii Watson Bot. King, 26. Glabrous and glaucous: stems 

 stout, branching above, 3-5 feet high: leaves all entire the radical ones 

 ovate, petioled, often 6-8 inches long and half as broad; cauline leaves 

 lanceolate, sagittate-clasping : flowers rather large nearly erect, on pedi- 

 cels 3-6 lines long: petals ovate-oblong, the claw exceeding the sepals, 

 purple 6-8 lines long : pods 2-3 inches long, tiearly erect upon the spread- 

 ing pedicels, subterete, more or less torulose- acuminate with the rather 

 long style. Eastern Washington and Oregon to Idaho, Utah, Nevada and 

 Arizona. 



T. integrifolium Endl. Gen. 876. Glabrous: stout, 2-6 feet high, 

 branching at the summit : radical leaves large oblong-elliptical, long-pet- 

 ioled ; cauline leaves mostly narrowly lanceolate 1-2 inches long sessile not 

 auriculate, ascending, the uppermost linear: flowers crowded and almost 

 corymbose at the end of the branches : sepals l%-2% lines long : petals 

 spa tulate-obovate, pale rose-color: fruiting racemes short and crowded: 

 pods 6-15 lines long, somewhat torulose accuminate with the slender 

 style, curved upwards on divaricate, commonly thickened and rigid pedi- 

 cels 1-5 lines long. On plains, Washington to southern California, Colo- 

 rado and Nebraska. 



T. laciniatum Endl. 1. c. Glabrous: stems stout erect 1-6 feet high, 

 simple or branched ; leaves all petioled 1-6 inches or more long, lanceolate 

 to broadly oblong, laciniately pinnatifid or coarsely and equally sinuate- 

 toothed: racemes long and crowded: sepals narrowly lanceolate, acumi- 

 nate 3-4 lines long, about half as long as the linear-spatulate petals: an- 

 thers long-exserted : pods 2-3 inches long pointed with the slender style, 

 distinctly stipitate, erect on short stout divaricately spreading pedicels. 

 Among rocks, etc., at the base of cliffs along the Columbia river in Oregon 

 arid Washington to California and Nevada. 



