Cheiranthus. CRUCIFERiE, 35 



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

 pedicels 4 lines long : seeds half a Hue long, narrowly winged. — Torr. & Gray, FL 

 i. 77 & 666. 



Annual or biennial, known only from 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 1A 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 J to- 2 inches long, aline 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 : jloieers yellow. 



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



leaves linear-oblong, nearly 2 inches long, sinuate-pinnatiiid 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. & Am. Bot. Beechey, 322. 



Near Monterey, Duiajlas. Mature fruit unknown. 



S. EEP.vxnus, 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 appressed 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 

 ned pods and accumbent cotyledons. Besides the arctii bus only the 



two following spe i mnd in A rica. 



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

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

 ical leaves oblong lance date or oblanceolate, 2 to 1 inches long, densely covered with 

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

 line bract like, halt' an inch Ion;.;, ovate-olilomj 1 , lanceolate, clasping: calyx. 2 lines 



Long; petals bright purple, 1 to 5 lines long: anthers short, oblong: pods sp 

 in;.,', broad, 1 to 2 inches long, not carinate, attenuate to the slender style : Bti 

 scarcely lobed. — Gen. PL i. 68; Watson, Bot. King Exp. 11. Hetperis Menriuii, 

 Hook. ; Hot. lleeelny, 322, t. 7">. Phcenicaulis cheiranthoides, Nutt. 1. c i. 89. 

 In the mountains, from Ebbett's I'.i^s in the Sierra Nevada (Brewer), to the Columbia River 

 ■ ■■ . and in Northwestern Nevada, Watson. 



2. C. asper, ' linn. >v Sehlucht. Rather sparingly pubescent with appr 

 2-parted hairs: -tem simple from an apparently biennial i t, leafy, 3 to 18 

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



