258 CRUCIFER^. 



pairs; anthers all fertile, linear-sagittate: pods 3—4 in. long, little 

 compressed, apparently somewhat quadrangular. — Apparently common 

 in Monterey and San Luis Obispo counties. Parry, Leintnoii; a hand- 

 some species, related to aS'. CalifornicHs and (S'. iufatus, notwithstanding 

 the erect sepals and the cohesion of the filaments in each of the two 

 long pairs of stamens. 



6. S. cordatus, Nutt.; T. & G. Fl. i. 77 (1838). Perennial, stoutish, 

 glabrous, glaucous, the clustered stems 1 — 2 ft. high: leaves thick, 

 usually coarsely toothed at least at the obtuse apex; the radical ones 

 spatulate-oblong, the upper cordate or ovate-lanceolate, obtuse or acute, 

 with broad rounded and auricled base: fl. 3 — 4 lines long: sepals broad, 

 obtusish, colored purplish: petals exserted, greenish or yellowish or 

 sometimes purplish: pods broadly linear, 2 — 4 in. long, compressed, 

 straight, spreading or ascending on short pedicels : seeds flattened and 

 winged. — A common species of the Rocky Mountains, reaching California 

 in the Sierra Nevada and coming westward even to Kern Co., near 

 Tehachapi; closely connecting with Arahis through A. repanda. 



7. S. barbatus, Wats. Proc. Am. Acad. xxv. 125 (1889). Perennial, 

 but stems apparently solitary as if from a horizontal rootstock, simple or 

 branched, rather slender, 1 ft. high or more; herbage glabrous, glaucous: 

 leaves all cauline, subequal, very numerous and rather crowded, broadly 

 cordate and clasping, of oval outline, obtusish, entire or at apex toothed, 

 }4 — 1 ill- long: raceme rather strict and dense: fl. small, dark purple; 

 sepals obtusish, setosely bearded at tip: petals little exserted: pods 

 spreading or recurved, 1 — 2 in. long, 1}4 lines wide, compressed: seeds 

 narrowly margined. — River banks, in sandy or gravelly ground, along 

 the upper Sacramento and its tributaries; perhaps common there, but 

 rarely collected. 



8. S. tortuosns, Kellogg, Proc. Calif. Acad. ii. 152, fig. 46 (1863). 

 Annual, erect, sparingly paniculate-branching above, 1 — 3 ft. high, 

 glabrous, glaucous: lower leaves oblong, narrowed to a winged petiole, 

 2 — 3 in. long, repandly toothed; middle cauline spatulate-oblong ok 

 -obovate, auriculate-clasping, rather remotely serrate-toothed; uppermost 

 round-cordate or cordate-oblong, mostly entire, abruptly or even cuspi- 

 dately acute, 1 — 1% in. long, clasping by a deep closed sinus: sepals 

 purplish, 3 — 5 lines long, slenderly acuminate, the attenuate tips reflexed 

 in flower, exceeded by the purple-veined yellowish petals: 4 longer 

 stamens about equal (one pair sometimes connate, KelL); anthers all 

 equal, linear-sagittate: torus greatly enlarged under the fruit: pod very 

 narrow, 3 — 6 in. long, falcate and recurved, the pedicel spreading or 

 reflexed: seeds winged. — In the Sierra about Yosemite and southward. 



9. S. orbiculatus. S. Breweri, Gray, partly, and a part of S. tortuosus, 



