MUSTARD FAMILY 45 



Locs.— Truckee, E. A. Walker 2139 ; Warner Mts., Morion 629 (in 1925) ; Alturas, Taylor ^ 

 Bryant (in 1910) ; Yreka, Butler 120 (in 1908), Eleaver 1; Monolith, Tehachapi Valley, Jepson 

 11,618 (in 1927). 



Eefs. — Sisymbrium sophia L. Sp, PI. 659 (1753), type European; Gray, Syn. Fl. li:139 

 (1895) ; Jepson, Man. 421 (1925). Sophia sophia Britt.; Britt. & Br. 111. Fl. ed. 2, 2:170, fig. 

 2051 (1913). 



6. S. incisum Engelm. Stem 1 to 2% feet high; herbage stellate-puberulent, 

 obscurely glandular; leaves thin, pinnate (or the upper leaflets not distinct) ; 

 leaflets ineised-pinnatifid, 3 to 14 lines long, the ultimate segments mostly 1 to 3 

 lines long; petals yellow; pods 6 to 8 lines long, straight or upwardly curved, erect 

 or ascending on widely spreading pedicels ; pedicels slightly longer, equaling or 

 slightly shorter than the pods ; seeds in 1 row (sometimes indistinctly in 2 rows) ; 

 style distinct (i/4 to % line long). 



Montane, 2000 to 11,500 feet: San Bernardino Mts.; Providence Mts.; White 

 Mts.; Sierra Nevada from Tulare Co. to Placer Co.; Yollo Bolly Mts. to Siskiyou 

 Co. East to Arizona and Tennessee, north to Saskatchewan. May- Aug. 



Locs. — S. Cal. : Seven Oaks, San Bernardino Mts., G. B. Grant 4049 ; Providence Mts., Muns 

 3439. White Mts.: Big Prospector Mdw., J. Grinnell. Sierra Nevada: Golden Trout Creek, 

 Tulare Co., Jepson 4945 ; Mt. Whitney, Jepson 1095 ; Horse Corral Mdw., Kings Canon, Jepson 

 765; Bench Mdw., Kaiser Ridge, Jepson 13,332; Devil's Postpile, Madera Co., A. L. Grant 1556; 

 Benson Lake, Yosemite Park, Jepson 4511; Sonora Pass, A. L. Grant 155, 275; Emerald Bay, 

 Lake Tahoe, J. T. Howell 1118. North Coast Ranges: Soldier Ridge, Yollo Bolly Mts., Jepson 

 13,385 ; Shackelford Creek, Butler 126. 



This species is obviously variable in leaf segmentation and in length of pedicels and in 

 form and size of pods. In the extended suite of specimens before us the following varieties are 

 discernible only as extreme forms in a series connected by intergrades, the last named being the 

 most definitely marked. 



Var. filipes Gray. Primary divisions of the leaves discrete or somewhat remote; upper leaves 

 or sometimes most of them with the terminal segment elongated-linear (mostly ^^ to 1 inch long, 

 y-2 to 1 line wide) and entire; sometimes, also, with all the segments of the leaves above the basal 

 ones entire; pedicels 5 to 8 lines long, usually longer than the pods. — East side of the northern 

 Sierra Nevada; rare in the southern Sierra Nevada. North to Oregon and Idaho, east to 

 Colorado. 



Locs. — Paradise Creek, Kings River, Newlon 222; Truckee, Sonne. Lewiston, Ida., Heller 

 2969. 



Var. sonnei Rob. Pods 3 lines long, somewhat acute, on pedicels about as long. — East slope 

 of the Sierra Nevada or in desert valleys : Nevada Co. to Sierra Co. ; White Mts. to Kern Co. 



Locs. — Sierraville, Jepson 8057; Truckee, Sonne 526; w. slope Washoe Mts., Nevada Co., 

 Davy 3164; Silver Canon, White Mts., Heller 8218; Mohave, Heller 7763. 



Var. liartwegianum Wats. Pods oblong, mostly acutish, short (1 to 2 lines long), on some- 

 what appressed or nearly erect pedicels, the pedicels about as long. — East slope or easterly areas 

 of the Sierra Nevada, 6700 to 10,000 feet: Tulare and Inyo Cos. to Mono Co. (Cal.) and to 

 Douglas Co., Nev. ; White Mts. East to Colorado, north to British Columbia, south to Mexico. 



Locs.— Rock Creek, Kern Caiion; Mt. Dana, H. M. Evans; Mono Lake, Brewer 1850; Silver 

 Canon near Big Prospector Mdw., White Mts., Jepson 7352. 



Refs. — SiSYMBRnrM iNCistui Engelm.; Gray, Mem. Am. Acad. n. ser. 4:8 (1849), type loc. 

 N. Mex.; B. & W. Bot. Cal. 1:41 (1876) ; Gray, Syn. Fl. 1^:139 (1895) ; Jepson, Man. 421, fig. 

 413 (1925). Bescurainia. incisa Britt. Mem. Torr. Club 5:173 (1894). Sophia incisa Greene, 

 Pitt. 3:95 (1896). Var. filipes Gray, Mem. Am. Acad. 4:8 (1849), type loc. Clearwater, Ore., 

 Spalding. Var. sonnei Rob. ; Gray, Sim. Fl. r:140 (1895), type loc. Truckee, Sonne 19 ; Jepson, 

 Man. 421 (1925). Sophia sonnei Greene, Pitt. 3:95 (1896). Bescurainia cahformca O. E. 

 Schulz; Engler, Pfl^r. 4"=: 330 (1924), not SmelowsUa calif ornica Gray. Var. hartwegianum 

 Wats.; B. & W. Bot. Cal. 1:41 (1876) ; Gray, Syn. Fl. 1^:139 (1895) ; Jepson I.e. Sisymbrium 

 hartwegianum Fourn. Sisymb. 66 (1865), type loc. Mexico, Hartweg 38 (ace. Syn. PL). Sophia 

 7j.art«;e<7m}m Greene, Pitt. 3:95 (1896). 



7. S. pinnatum Greene. Tansy Mustaed. Stem % to 2 feet high; herbage 

 ashy-tomentuiose or puberulent, sometimes glabrate and green; leaves pinnately 

 or bipinnately dissected; segments elliptic to linear-oblong, i/4 to 1 line long; petals 

 yellow; pods oblong to linear, acute at each end, 2 to 5 lines long, shorter than the 



