64 CRUCIFEE^.. lbpidium. 



petals small: pods in a loose raceme, spreading, glabrous and shining, 

 rounded, 1-2 lines broad, acutely margined, the teeth short and obtuse : 

 seeds often aeh-color. On dry hillsides, Washington to Oaliiornia. 



* * Low annuals : pedicels flat : petals often wanting : stamens 2-4 : 

 style none : pods reticulated, the apex produced into 2 distinct teeth. 



L. reticniatum. Minutely hispid ; stems erect, sparingly branched, 

 1-2 inches high, from a slender perpendicular annual root: leaves pinnati- 

 fid, with linear entire or toothed segments,- including the dilated base of 

 the petiole 6-12 lines long : pedicels approximate, a line long, thin-edged, 

 erect: sepals oblong, very acute, with hyaline borders, persistent: stamens 

 2: pods glabrous, reticulated, elliptical, a line long, the short obtuse teeth 

 somewhat connivent : seeds oblong-obovate, narrowly margined on the 

 outer edge. Roadsides, southwestern Oregon. Rare. 



L. dictyotum Gray Proc. Am. Acad, vii, 329. Pubescent throughout 

 with short spreading hairs, or the leaves glabrous : stems 1-3 inches high, 

 ascending, slender and branching : leaves narrowly linear, 1-2 inches long, 

 entire or pinnatifid with a few linear lobes: sepals scarious-margined, not 

 persistent : petals white, but little exceeding the sepals sometimes wanting 

 stamens 4 : pods rounded, a line broad, the short acutish teeth connivent, 

 finely reticulated and pubescent, exceeding the thick erect pedicels. In 

 sandy saline places under "Sage brush", eastern Washington to California. 



L. acntidens. L. dictyotum var. acutidens Gray Proc. Am. Acad, xii, 54. 



Sparingly pubescent with short spreading hairs : stems 3-10 inches long, 

 erect and nearly simple, or decumbent and much branched from the base : 

 leaves linear, 1-3 inches long, entire or sparingly pinnatifid : pods ovate, 2 

 lines or more broad, deeply notched above, with 2 acuminate divergent 

 teeth, equalling or shorter than the erect or outwardly curved pedicels. In 

 alkaline soil, eastern Oregon to California. 



L. Oregannm Howell P. C. PI. Coll. 1887. Finely more or less hispid- 

 ulous : stems erect, simple or with a few ascending branches, 3-8 inches 

 high: leaves linear, entire or with a few linear attenuate segments: sepals 

 promptly deciduous pods round-ovate, 1% lines broad, not reticulated or 

 very faintly so, smooth, the rather prominent teeth divergent. Roadsides, 

 southwestern Oregon near Woodville. 



L. oxycarpum T. & G. Fl. i, 116 Nearly or quite smooth : stems slen- 

 der, branched from the base ; branches ascending, 4-6 inches long, loosely 

 floriferrius more than half their length : leaves linear, acute, subentire or 

 pinnatifid with a few narrow acute teeth : pedicels comparatively slender, 

 widely spreading or deflexed, 1% lines long: flowers small, apetalous; sep- 

 als very unequal, half line long: stamens 2: pods suborbicular, glabrate, 

 finely reticulated, IJ^ lines broad, tipped with 2 very short widely diver- 

 gent teeth. In saline soil, central California to Brit. Columbia. 



32 THLASPI L. Gen. n. 802. 



Low glabrous herbs with simple stems entire or toothed leaves 

 and white or pinkish flowers. Sepals short-oval, obtuse, thin- 

 margined, erect or slightly spreading. Petals obovate or oblan- 

 ceolaie, entire. Stamens free and unappendaged : anthers short. 

 Style slender or sometimes none. Stigma small, entire or slight- 

 ly emarginate. Pods cuneate-obovate or oblanceolate,, compressed 

 contrary to the partition, few-seeded : valves acutely carinate or 

 winged. Seeds, somewhat turgid, not margined. Cotyledons 

 accumbent. 



