Cheiranthus. CRUCIFER^E. 35 



petals linear, purple or whitish : pods 3 to 5 inches long, very narrow, pendulous ; 

 pedicels 4 lines long : seeds half a line long, narrowly winged. Torr. & Gray, Fl. 

 i. 77 & 666. 



Annual or biennial, known only froiff Nuttall's description and the specimen in herb. Hooker. 

 Bushy hills near San Diego ; distinguished from other species of the genus by its pendent pods. 

 A specimen collected by Bolander, probably in the same region, seems referable here, though 

 simple and but 1 ^ feet high : sepals narrow, acute, deep purple, 3 lines long ; petals narrow, pur- 

 ple-veined, nearly twice as long ; style short, with dilated stigma. 



7. S. hispidus, Gray. Annual, hirsute throughout, simple or branched, 2 to 5 

 inches high : leaves obovate-oblong or cuneate, coarsely toothed or incised above, 

 the teeth obtuse ; stem- leaves sessile, scarcely at all clasping : raceme short, loosely 

 flowered, the flowers spreading or at length recurved ; sepals somewhat membrana- 

 ceous, purplish, acutish, 2 to 3 lines long, half as long as the bright purplish-red 

 petals : pods hispid, 1| to 2 inches long, a line wide, straight, erect : style none : 

 seeds winged. -Proc. Calif. Acad. iii. 101 ; Proc. Am. Acad. vi. 186. 



On the dry summit of Mt. Diablo, Brewer, Bolander. 



* * * * Pilose with simple hairs : leaves not sagittate nor clasping : flowers yellow. 



8. S. flavescens, Hook. Annual : stems simple, erect, a foot high : radical 

 leaves linear-oblong, nearly 2 inches long, sinuate-pinnatitid or -toothed, petioled, the 

 cauline scarcely an inch long : flowers erect ; petals yellowish, linear, nearly twice 

 longer than the oblong acute sepals : pods erect, hirsute, beaked with the slender 

 style. Ic. PL t. 44 ; Hook. & Arn. Bot. Beechey, 322. 



Near Monterey, Douglas. Mature fruit unknown. 



S. REPANDUS, Nutt. Hirsute, especially below : stems simple, about 2 feet high : leaves 

 oblong-lanceolate, elongated, clasping, angularly toothed or repand above : petals white, linear, 

 about equalling the linear sepals : pedicels shorter than the calyx. Santa Barbara, Only known 

 from Nuttall's imperfect description. It may be a species of Arabis. 



8. CHEIRANTHUS, Linn. 



Pod elongated, compressed; valves 1-nerved or somewhat carinate. Seeds in one 

 row, flattened, not winged ; cotyledons accumbent or rarely oblique. Petals with 

 elongated claw and flat limb. Calyx large, not colored, the outer sepals strongly 

 gibbous. Stigma with two spreading lobes. Perennial or biennial, more or less 

 canescent with stellate or ap pressed 2-parted pubescence ; leaves entire or nearly so ; 

 flowers large, purple or yellow. 



A genus of perhaps a dozen species of the northern hemisphere, distinguished from Erysimum 

 by the more flattened pods and accumbent cotyledons. Besides the arctic C. pygmceus only the 

 two following species are found in America. 



1. C. Menziesii, Benth. & Hook. Perennial with a thick long-persistent 

 branching rootstock : the stems simple, smooth, scape-like, 6 to 8 inches high : rad- 

 ical leaves oblong-lanceolate or oblanceolate, 2 to 4 inches long, densely covered with 

 a short stellate pubescence, obtuse or acutish, attenuate into a winged petiole ; cau- 

 line bract-like, half an inch long, ovate-oblong to lanceolate, clasping : calyx 2 lines 

 long ; petals bright purple, 4 to 5 lines long : anthers short, oblong : pods spread- 

 ing, broad, 1 to 2 inches long, not carinate, attenuate to the slender style : stigma 

 scarcely lobed. Gen. PI. i. 68 ; Watson, Bot. King Exp. 14. Hesperis Menziesii, 

 Hook. ; Bot. Beechey, 322, t. 75. Phcenicaulis cheiranthoides, Nutt. 1. c. i. 89. 



In the mountains, from Ebbett's Pass in the Sierra Nevada (Brewer), to the Columbia River 

 (Douglas), and in Northwestern Nevada, Watson. 



2. C. asper, Cham. & Schlecht. Rather sparingly pubescent with appressed 

 2-parted hairs : stem simple from an apparently biennial root, erect, leafy, 3 to 18 

 inches high : leaves spatulate or oblanceolate, the lower long-petioled, the cauline 



