CRUCIFER^. 471 



++ Flowers rather large : sepals 3 to 6 liues in length : plant stout. 



= Stem leaves sessile by cordate- or auriculate-claspiug bases. 



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



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



S. carinatus, Wright, p. 169. 



2. Leaves entire or merely dentate. 

 S. Arizonicus, Watson, p. 169. 

 S. cordatus, Nutt., p. 169. 



b. Pods much narrower, | to 1^ lines in breadth; seeds slightly wing-margined or wingless : 

 leaves cordate-clasping. 



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



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

 this species is doubtfully referred a specimen from Shasta Co., California, coll. Whitmore. 



= = Stem leaves cuneate to petiolate exauriculate bases : capsules narrow, erect or nearly 

 so : species of Oregon. 



S. Howellii, Watson, p. 170. 



++ -H- Flowers smaller : sepals 1| to 2^ lines long: plants more slender: capsules narrow, 

 mostly reflexed or pendulous at maturity. 



= Floral leaves elliptical or ovate, deeply cordate and amplexicaul. 



S. Lemmoni, Watson, p. 169. 



S. diversifolius, Watson, p. 168. 



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



S. longirostris, Watson, p. 170. 



-)— -1— Stem and leaves hirsute-pubescent : annual with narrow reflexed pods. 



S. heteroph^Uus, Nutt., p. 169. 



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

 orbicidatus, & S. suffrutescens, where sometimes all distinct) : capsules rather narrow : 

 flowers often more or less zygoraorphous : upper pair of anthers frequently reduced or 

 sterile. 



■)— Sepals sube(iual : flowers dark purple or violet . all four longer filaments connate in 

 pairs : leaves linear-oblong, cuneate or subamplexicaul at the base : slender erect annual 

 of Texas and Indian Territory. 



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

 cent near the base. 



-1— -i— 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 somewhat variable species (ranging from 

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

 are certainly only forms : S. peramcmus, Greene, Bull. Torr. Club, xiii. 142 ; 5. albidus, 

 Greene, Pittonia, i. 62 ; and 5. Blolettii, Greene, 1. c. ii. 225. The following, not seen by the 

 writer, would also seem to be nearly related : S. Mildred/E, Greene, Fl. Francis. 260, differ- 

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

 VERsfcoLOR, Greene, Erythea, iii. 99, with flowers said to be more irregular than in the 

 related forms, the petals " white, changing to lilac-purple, very unequal." 



b. Calyx narrower : sepals hispid-ciliate upon the midnerve : leaves lanceolate or oblong, 

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



