46 CRUCIFEEA'. aeabis. 



STREPTANTHtrS. 



A. Columbiana Macoun Oat. Canada PL ii, 304. Winter annual: al- 

 most smooth or pubescent below with branching hairs : lower leaves 

 shghtly toothed and tapering into a petiole; cauline sessile and often clasp- 

 ing : flowers white : pods exactly sickle-shaped, 3-4 inches long. Common 

 on the lower slopes of mountains, northern Washington to Brit. Columbia. 



A. canescens T. & G. Fl. i, 83. Finely stellate-pubescent throughout : 

 Etemsoneto several from a perennial or biennial root, 2-8 inches high; 

 simple or branched ; lower leaves linear-oblanceolate, an inch long or less ; 

 ■cauUne leaves linear, clasping but hardly auriculate : flowers small 2 lines 

 or less long, pale: pods pendulous, pubescent or glabrate, 1-1>^ inches 

 long by less than a line broad, on pedicels 1-3 lines long; valves 1 -nerved 

 to the middle: seeds small, orbicular, winged, in 1 or 2 rows. On dry 

 plains. Blue Mountains and Harney valley Oregon; to the Eocky 

 Mountains and Brit. Columbia. 



A. arcuata Gray Proc. Am. Acad, vi, 187 (?). More or less stellate- 

 pubescent or hirsute : stems erect, 6 inches to 2 feet or more high from a 

 perennial woody caudex, simple or branched; lower leaves spatulate, entire 

 or denticulate acute, 1-2 inches long; cauline oblong-lanceolate, sagit- 

 tate and clasping at base 6-12 lines long or more ; racemes rather few-flow- 

 ered; flower? pale nodding; petals 3-4 lines long, white or purple, twice as 

 long as the sepals: pods 1-4 Inches long by a line or more broad erect 

 and slightly curved or spreading and strongly falcate . On rocky ridges 

 and dry plains, eastern Oregon and Washington to southwestern Oregon. 



A. subpinnatifida Watson Proc. Am. Acad, xx, 353. Canescent with a 

 very fine and dense stellate pubescence : stems 1 to several from a branch- 

 ing somewhat woody base : lower leaves crowded and persistent, linear- 

 oblanceolate, entire or sparingly toothed, 9-12 lines long; upper ones 

 lanceolate, coarsely and subpinnatifidly toothed : flowers pale pink, 3-6 

 lints long: pods strongly reflexed, on pedicels 2-5 lines long, 1)^-3 inches 

 long, 1-1)^ lines broad, more or less attenuate to the short style, pubes- 

 cent, slightly curved; valves 1-nerved to the middle and veined ; seeds in 

 one row, as broad as the partition, winged. On dry rocky ridges, south- 

 western Oregon and and adjacent California to northwestern Nevada. 



7 STBEPTANTHXJS Nutt.' Jour. Acad. Philad. v, 184, t. 7. 



Caulescent branching herbs with entire or toothed, or rarely 

 pinnatifid leaves and purple white or yellowish flowers. ' Sepals 

 ovate or oblong usually colored, equal at base (rarely one or both 

 pair saccate^, commonly connivent. Petals often without a di- 

 lated blade, more or less twisted or undulate; the claw cha.h- 

 neled. Stamens 6, the longer pair often connate below. Anthers 

 more or less elongated, sagittate at base. Pods sessile upon the 

 enlarged receptacle, oblong to narrowly linear compressed to sub- 

 terete : valves 1-nerved ; partition hyaline : stigma simple. Seeds 

 flat, margined or winged. Cotyledons accunibent. Ours all of 



§ EuklisiaT. & G. Fl. i, 67. Petals narrow, the blade but 

 little if any broader than the claw, undulate crisped. Calyx 

 closed or with spreading tips. 



S. orbiculatus Greene Fl. Francis. 258. Glabrous and glacous ■ stems 

 erect from an annual or biennial root, 6-18 inches high, diffusely branched 

 from the base : lowest leaves round obovate, very obtuse or even truncate 

 crenately or more remotely and reparidly toothed, abruptly narrowed to a 

 petiole fa lorg as the blade: middle cauline otovate-spatulate, auricled 

 and clasping ; uppermost orbicular, mostly eiitire, obtuse, sepals purple 



