Streptanthus. CRUCIFER^. oo 



branches somewhat flexuous : leaves oblanceolate, 3 to 4 inches long, obtuse 

 coarsely sinuate-toothed, attenuate to a winged subclasping base, on the'' branches 

 narrower and acutish : calyx pubescent, somewhat membranaceous, 1 to U lines 

 long, the pinkish petals a little longer : pods 3 inches long, a line Avide, ascendiii", 

 falcate, somewhat pubescent, tipped with a very short style : seeds in one row,' 

 broadly winged. — Proc. Am. Acad. xi. 122. 



Yosemite Valley, Bolandcr, n. 4881. A well-marked species. 



* % % % Mostly x>erennials : j)ods imially curved, more or less reflexed, or arcuate 

 doivmvard : style none : seeds in 1 or 2 rows. 



7. A. Holbollii, Hornem. ]More or less stellate-pubescent, rarely hirsute, or 

 even glabrous : stem erect, | to 2 feet high, simple or branching : lower leaves 

 spatulate, entire or denticulafe ; cauline oblong-lanceolate, sagittate and clasping at 

 base, I to 1 inch long or more : petals twice longer than the calyx, 3 to 4 lines 

 long, white or rose-color or rarely purple, becoming reflexed : pods 1 to 4 inches 

 long, I to 1 line wide, strongly reflexed : seeds wingless or narrowly margined. — 

 n. Dan. xi, t. 1879, A. retrofracta, Grab. ; Watson, Bot. King Exp. 18. ^Tuirltis 

 patula, Grab. Sisijmhrium rejlexuvi, Kellogg, Proc. Calif. Acad. ii. 101, fig. 29. 



Frequent in the Sierra Nevada from the Yosemite Valley northward, and east to New Mexico 

 and the Saskatchewan ; it ranges to the Arctic Circle and Greenland. Very variable, especially in 

 its pubescence, which is usually densely stellate, rarely tomentose, sometimes extending to the 

 calyx and even to the jjods. 



8. A. arcuata, Gray. Canescently villous or tomentose with branching hairs, 

 the pubescence of the inflorescence short, branched and entangled : stems rather 

 stout, erect from a branching perennial base, 1 to 2 feet high or more : lower leaves 

 numerous, oblanceolate, on slender petioles ; tlie cauline oblong- or linear-lanceolate, 

 1 to 2 inches long, auricled at base, acute ; all sparingly sinuate-toothed, sometimes 

 entire : flowers erect ; petals purple or deep violet, 4 to 6 lines long, the sepals half 

 as long and often colored : pods 3 to 4 inches long, scarcely a line wide, spreading 

 and recurved: seeds narrowly winged or wingless. — Proc. Am. Acad. vi. 187° 

 Watson, 1. c. Streptanthus arcuatus, Xutt. 



From Santa Barbara {Nuttall) and the mountains near Tejon {JFaUace) northward in the 

 Sierra Nevada to tlie North Fork of the American River. What is probably the same is also 

 found in Nortliwestern Nevada {Anderson, Watson), but more glabrous above and with the calvx 

 and pods a little shorter. 



_ 9. A. Breweri, Watson. Cespitose, canescent with dense stellate pubescence, 

 villous above with spreading straightish and nearly simple hairs: stems simple 

 from a branching perennial base, 2 to 10 inches high : radical leaves spatulate, an 

 inch long or less, shortly petioled, entire ; cauline ovate-oblong, sessile but not 

 sagittate, acute, 6 to 9 lines long : petals deep rose-color, 1 to 4 lines long, twice 

 longer than the purplish sepals : pods spreading or recurved, 1-| to 11 inches long, 

 a line wide : seeds narrowly winged. — Proc. Am. Acad. xi. 123*! 



From Mt. Diablo {Brewer, Bolander) to Lake Co. {Greene) and Mendocino Co., Bolandcr. 



7. STREPTANTHUS, Nutt. 



Pod linear, flat ; valves 1 -nerved. Seeds in one row, flattened, more or less 

 Avinged ; cotyledons accumbent. Petals often without a dilated blade, more or less 

 twisted or undulate, the claw channelled. Sepals broad and usually colored. 

 Longer filaments sometimes connate. Anthers elongated, sagittate at base. Stigma 

 simple. — Mostly annual or biennial ; leaves usually sagittate and clasping, toothed 

 or entire or rarely pinnatifid. — Gray, Proc. Am. Acad. vi. 182. AVatson, Bot. 

 King Exp. 19 & 429. 



A genus of a dozen or more species, confined to Western North America. 



