46 CRUCIFERAE 



slender spreading or divaricate pedicels; seeds in 2 rows; style very short (Yq line 

 long) or almost none. 



Desert or arid slopes and mesas, 1250 to 8500 feet: n. Humboldt Co.; Siskiyou 

 and Modoc Cos.; north end and ea-stern slopes or summits of the Sierra Nevada; 

 head of the San Joaquin Valley; south to the Mohave and Colorado deserts, thence 

 west to cismontane Southern California; occasional in the South Coast Ranges; 

 more common southward in our region than northward. East to Virginia. Mar.- 

 May. 



Locs. — Humboldt, Siskiyou and Modoe Cos.: Trinity Summit, Jepson 2049a; MeAdams 

 Creek, Butler 895 ; Klamath Eiver, Butler 727 ; Egg Lake, M. S. Baker; Lake City Canon, Austin 

 4' Bruce 224G. Sierra Nevada: Donner Lake, Ileller 6937; Truckce, Sonne r)404b; Bloody Canon, 

 Mono Co., Chesnvt 4" Drew; Yosemite Valley, Blasdale; Golden Trout Creek, Tulare Co., Jeyson 

 4942; Tehachapi, Davy 2167. Desert region: Cottonwood Creek, White Mts., Duran ; Inde- 

 pendence, S. W. Austin ; Ilanaupah Cafion, Panainint Range, Jepson 7032 ; Lanfair, Maye Ten- 

 nant; Mohave, Heller 7763; Barstow, Jepson 5363, 6603; Cottonwood Spr., n. Colorado Desert, 

 Jepson 12,572; San Felipe Valley, Jepson 8726; Vallecito, Jepson 8536. Upper San Joaquin 

 Valley: Huron, E. 0. Camphell; Eastside canal, Bakersfield, Davy 1914. South Coast Ranges: 

 Arroyo Mocho, Alameda Co., Morton 811; San Luis Obispo, Summers. Cismontane S. Cal.: 

 Canada del Capitan, Santa Barbara coast, Jepson 11,905; Santa Cruz Isl.; Santa Susanna Mts., 

 Ventura Co., Brewer 205; Saugus, Davy; Arroyo Seco, Los Angeles, Peirson 309; San Bernardino 

 Valley, S. B. 4" T^- ^- Parish; Santiago Creek, Santa Ana Mts., Alice King; Julian, San Diego 

 Co.; Laguna, San Diego Co., Cleveland. 



Var. brachycarpum Jepson comb. n. Pods oblong, obtusish, 1 to ll^ lines long. — Inyo Co. 

 foothills. North to eastern Oregon and Canada. 



Locs.— Bishop, Heller 8363. Desert Well, e. Ore., Leiberg 389. 



Eefs. — Sisymbrium pinnatttm Greene, Bull. Cal. Acad. 2:390 (1887); Jepson, Fl. W. Mid. 

 Cal. 215 (1901), Man. 421, fig. 414 (1925), Erysimum pinnatum Walt. Fl, Car. 174 (1788), 

 type loc. "Carolinas." Sisymbrium canescens Nutt. Gen, 2:68 (1818), Va, to Ga. ; B, & W. Bot. 

 Cal. 1:40 (1876) ; Greene, Fl. Fr. 271 (1891) ; Jepson, Fl. W, Mid. Cal. I.e., ed. 2, 183 (1911). 

 Sophia pinnata Howell, Fl. Nw. Am. 56 (1897). Sophia brevipes Rydb. Bull. Torr. Club 29:238 

 (1902). Sisymbrium incisum var. californicum Blkp. Mont. Agr. Coll. Stud. Bot. 1:60 (1905). 

 Sophia calif ornica Rydb. I.e. Desourainia pinnata Britt. Mem, Torr. Club 5:173 (1894) ; O. E. 

 Schulz in Eugler, Pflzr, 4'°'' -.326, fig. 66 (1924). D. menziesii O. E. Schulz, I.e. 328. Var. 

 BRACHYCARPUM Jepson. S. brachycarpum Rich.; Franklin, First Joum. ed. 1, app. 744 (1823). 

 Descurainia paradisa O. E. Schulz in Engler, Pflzr. 4^"^: 331 (1924), at least as to citation of 

 Heller 8363, which has the seeds in two rows. 



8. S, cumingianum F. & M. Closely resembling stout forms of S. incisum; 

 stem stouter, simple, 3V2 feet high, pubescent with short branched hairs; leaves 

 densely canescent-tomentose, their blades ovate or round-ovate in outline, % to 

 11/2 inches long, pinnately divided into 3 or 4 pairs of segments, the segments vary- 

 ing from inequilaterally incised or serrate to entire; petals white; pods narrow, 

 abruptly pointed, sparsely pubescent with branched hairs, 7 to 9 lines long; seeds 

 in 2 rows, lightly compressed. 



Thin woodlands or open ground, 4500 to 6500 feet : Mohave and Colorado des- 

 erts, and bordering southerly or westerly ranges. East to New Mexico. Chile. 

 June-July. 



Locs. — Victorville, Parish 10,542 ; Strawberry Valley, San Jacinto Mts. ; Vandeventer, San 

 Jacinto Mts, 



Refs. — Sisymbrium cumingianum F. & M. Ind. Sera. Hort. Petrop. 38 (1835), type from 

 Chile; Gray, Syn. Fl. r:139 (1895) ; Jepson, Man. 422 (1925). 



6. ISATIS L. 



Ours a biennial or perennial herb. Flowers small, yellow, crowded in small 

 panicled corymbs. Pod 1-celled, 1-seeded, indehiscent, winged and strikingly like 

 a samara or ash-fruit. — About 50 species, Europe, Asia. (The classical name). 



1. I. tinctoria L. Dyers Woad, Stems branching from or near the base, 

 1 to 2 (or 3) feet high; herbage somewhat glaucous, glabrous or the lower leaves 



