74 



CRUCIFERAE 



Locg. — s. Cal., 50 to 5000 feet: Laguna Mta., Pcirson; Del Mar, Ncwlon 297; Saundcr Mdw., 

 Mt. San Jacinto, C. V. Meyer 170; Santiago Creek, Sant^a Ana Mts., Alice King; Little Green 

 Vallov, San Bornardino Mts.; San Dinias, Chnndlcr ; Mt. Gleason, Ijos Angeles Co., Barber 217; 

 Santa Cruz Isl., T. Brandegee; Mission La Purissima, Jepson 11,940. Sierra Nevada, 1700 to 



9G00 feet: More Rock, Giant Forest, Newlon 16 ; Kaiser 

 Peak, Jcpsnn 13,029; Yosemite Valley, Bolander; Hog 

 Ranch (Mather), A. L. Grant 979; Iletch Hetchy, Jep- 

 son 4620; Sonora Pass, A. L. Grant 281; Rawhide, 

 Tuolumne Co., A. L. Grant 664; Angora Peak to 

 Keiths Dome, Ottley 800; Emerald Bay, Lake Tahoe, 

 J. T. Howell 1093; Lake City, Modoc Co., Austin 4- 

 Brncc. Marysville Buttes: South Peak, Jepson 13,390. 

 Coast Ranges, 50 to 4000 ft.: San Emigdio Canon, 

 Kern Co., Davy 2039; Paso Robles, Barber; Orcstimba 

 Canon, w. Stanislaus Co., Brewer 1272 ; Mt. Day, Santa 

 Clara Co., It. J. Smith; Antioch, Davy 996; Araquipa 

 Hills, w. Solano Co., Jepson 13,391 ; Winneshaw, w. Te- 

 hama Co., Jepson 178e; Kneeland Prairie, Tracy 2636; 

 Trinity Summit, Humboldt Co., Davy 5856; Yreka, 

 Butler 724. 



Var. bealianum Jepson var. n. Corolla yellow ; fruits 

 broader and shorter. — (Corolla flava; frutex latior et 

 brevior quam specie.) — Desert mesas and ridges, 2000 

 to 3000 feet: Mohave Desert (Barstow, Jepson 5181, 

 type; Daggett, Mary Bcal). 



A^ar. perenne Wats. Perennial; stems more slender, 

 often tufted, 5 to 15 inches high; flowers lemon-yellow; 

 pods thinner, flattened, tapering at apex. — Subalpine, 

 in the Sierra Nevada, 8000 to 12,500 feet, from Mari- 

 posa Co. to Tulare Co. 



Geog. note. — Var. perenne Wats, is found as high as 

 12,000 to 12,500 feet on Mt. Whitney. At these higher 

 altitudes it lives to a maximum age of twelve years as 

 evidenced by the annual xylem rings and the constric- 

 tions which mark the position of successive terminal 

 winter buds, that is about six times the longevity of 

 the common form of the Sierra Nevada forest at middle altitudes, or of the arid type of the 

 Mohave Desert. It seems likely that the variety perenne is a glacial relic, is in reality the natural 

 type of the species and that the biennial form has been derived from it as an adaptation to drier 

 soils or to milder temperatures. 



Locs. — Mt. Dana, Brewer 1749; Mono Pass, Jepson 4464; Kaiser Peak, A. L. Grant; Mt. 

 Silliman, Jepson 750; Alta Mts., Tulare Co., Hopping 146; Mt. Whitney, Jepson 1074; Army 

 Pass, Jepson 5063 ; upper Little Kern River, Purpus 5219. 



Refs.— Erysimum asperum DC. Svst. 2:505 (1821) ; Hook. Fl. Bor. Am. 1:64, t. 22 (1830) ; 

 Jepson, Fl. W. Mid. Cal. 218 (1901), ed. 2, 185 (1911), Man. 433 (1925). Cheiranthus asper 

 Nutt. Gen. 2:69 (1818), type from plains of the upper Missouri River, Nuttall. E. calif ornicnm 

 Greene, Erythea 3:69 (1895), type loc. Antioch, Greene. Cheiranthus calif ornicus Greene, Pitt. 

 3:133 (1896). E. nevadcnsc Hel. Muhl. 1:52 (1904), type loc. Donner Lake, Heller 6956. Chei- 

 rinia nevadcnsis Hel. Muhl. 8:96 (1912). Var. bealianum Jepson. Var. perenne Wats.; Cov. 

 Proc. Biol. Soc. Wash. 7:70 (1892), type loc. between Mineral King and Farewell Gap, Tulare 

 Co., Coville 1487; Jepson, Man. 433 (1925). Cheiranthus perennis Greene, Pitt. 3:132 (1896). 



3. E. insulare Greene. Island Wallflower. Woody-based plant 1 to 2 feet 

 high; shoots of the season from the woody basal branches of two kinds, fertile 

 shoots and sterile shoots; fertile shoots % to l^/^ feet long, leafy throughout, ter- 

 minated by a dense raceme; sterile shoots 6 to 7 inches long, very densely leafy at 

 the ends, sparingly leafy below ; herbage glabrous, or the young parts canescent ; 

 leaf -blades narrowly linear, 14 to 1 line wide, 2 to 41^ inches long, somewhat con- 

 tracted toward the base but scarcely petioled; racemes l^/^ to 2 inches long, the 

 pedicels spreading; corolla yellow; pods only slightly thickened, ll^ to 2 inches 

 long; seeds not margined. 



Dunes and sandy slopes, 5 to 500 feet: San Miguel Isl.; Santa Rosa Isl.; Los 

 Angeles coast. June. 



Fig. 139. Erysimum asperum DC. 

 a, base of plant, X % ; b, fl. stem, X 

 Vs ; c, pod, X Va ; d, seed, X 4. 



