CRUCIFEILE. 471 



++ Flowers rather large : sepals 3 to 6 lines in length : plant stoat. 



= Stem leaves sessile by cordate- or auriculate-clasping liiises. 



a. Capsules broad, erect or nearly so ; seeds broadly winged. 



1. Leaves (at least the lower) runciuate-piuuatifid : Southern. 



S. carinatus, Wukjht, p. ig9. 



2. Leaves entire or merely dentate. 

 S. Arizonicus, Watson, p. 169. 

 S. cordatus, Nutt., p. 169. 



b. Pods much narrower, J to Ij lines in breadth; seeds slightly wing-margined or wingless : 

 leaves cordate-clasping. 



S. campestris, Wat.son, p. 169. Upper leaves oblong-lanceolate, acute. 

 S. barbatus, Watson, p. 169. Upper leaves elliptical, oval, or suborbicular, obtuse. — To 

 tliis species is doubtfully referred a specimen from Sliasta Co., Calif(jrnia, coll. Whitmore. 

 = = Stem leaves cuneate to petiolate e.xauriculate bases : capsules narrow, erect or nearly 

 so : species of Oregon. 

 S. Howellii, Watson, p. 170. 



++ ++ Flowers smaller: sepals li to 2i lines long: plants more slender: capsules narrow, 

 mostly reflexed or ]jendulous at maturity. 



= Floral leaves elliptical or ovate, deeply cordate and ample.\icaul. 

 S. Lemmoni, Watson, p. 169. 

 S. diversifolius, Watson, p. 168. 



= == Loaves all oblong to linear, narrowed and not auricled at the base : annual. 

 S. longirostris, Watson, p. 170. 



-)— -t— Stem and leaves hirsute-pubescent : annual with narrow refle.\ed pods. 

 S. heterophyilus, Nutt., p. 169. 



* * Filaments of one or both pairs of longer stamens connate (except in S. torlnosus, S. 

 07-bicul(itiis, & S. suffrutescens, where sometimes all distinct) : capsules rather narrow : 

 flowers often more or less zygomorphous : upper pair of anthers fre(iuently reduced or 

 sterile. 

 -4— Sepals subequal: flowers dark purple or ^^olet. all four longer filaments connate in 

 pairs : leaves linear-oblong, cuneate or subample.xicaul at the base : slender erect annual 

 of Texas and Indian Territory. 

 S. hyacinthoides, Hook., p. 170. Stem either quite glabrous or more often hispid-pubes- 

 cent near the base. 



-t— -»— Sepals of the outer pair similar to each other, often more or less strongly saccate or 

 carinate, yet not very dissimilar to the inner pair : species of the Pacific Slope. 

 = Stem and foliage more or less hispid-pubescent or hirsute. 

 a. Calyx quite glabrous, rather broad and saccate : leaves lanceolate to narrowly oblong, 

 more or less sagittate-auriculate at the base. 

 S. glandulosus, Hook., p. 171. A common and .><omewhat variable species (ranging from 

 the San Hernardino Mts., W. G. Wright, northward to S. Oregon), of which the following 

 are certainly only forms: S. perannrniis, Greene, Bull. Torr. Club, xiii. 142; >'. nlbiilus, 

 Greene, Pittonia, i. 62 ; and S. Diolettil, Greene, 1. c. ii. 225. The following, not seen by the 

 writer, would also seem to be nearly related : S. Mii.prkd.k, Greene, Fl. Francis. 260, differ- 

 ing chiefly, as to described character, in its smaller very dark-coli)red flowers; and S. 

 VERsfcoLOR, Greene, P>ythea, iii. 99, with flowers .said to be more irregular tliaii in the 

 related forms, the petals " white, changing to lilac-purple, very une(iual." 

 6. C.ilyx narrower: sepals hispid-ciliate upon the midnerve : leaves lanceolate or oldting. 

 acute, coarsely toothed, sagittate-auriculate at the base. 



