170 CRUCIFER^. Streiytanthus. 



2 to 3 inches long by less than a line broad, subtetragonal, beaked by a slender style ; stigma 

 sessile ; seeds small and crowded, rather narrowly winged. — Nutt. in Torr. & Gray, Fl. i. 

 77, 666; Gray, Proc. Am. Acad. vi. 185, in part. — S. California, from the boundary to San 

 Bernardino Mts. and Sta. Barbara (?). 



* * * Filaments distinct : leaves not clasping nor auriculate : pods narrow. 



-)— Glabrous and glaucous biennial {?). 



S. Howellii, Watson. Stems stout, 1 to 2 feet high, simple : leaves all cauline, from obo- 

 vate or obovate-spatulate and petiolate below to narrowly oblanceolate above, entire or 

 rarely sparingly toothed, 1 to 2 inches long : flowers rather large, brown purple, 4 to 6 lines 

 long : calyx more or less saccate, green or purplish : stigma broad and sessile ; pods ascend- 

 ing, curved, 2 to 3 inches long, 1 to IJ lines broad; seeds oblong, winged. — Proc. Am. 

 Acad. XX. 353. — In the Coast Mts. of Curry Co., Oregon, T. Howell, 1884, and near Waldo, 

 Josephine Co., 1887, by the same collector. 



-H- -I— Annuals. 



S. longirostris, Watson. Glabrous and glaucous, branching, 1 to 2 feet high : radical 

 leaves ovate-spatulate, soon deciduous ; cauline linear to narrowly oblanceolate, entire or 

 sparingly toothed : flowers spreading or reflexed, white, 2 to 3 lines long : sepals narrow : 

 pods pendulous on short pedicels, straight, 1 to 1^ inches long by a line broad, attenuate to 

 a slender style: seeds elliptical, winged. — Proc. Am. Acad. xxv. 125. S. longifolius, var., 

 Torr. Pacif. R. Rep. iv. 65. Arabis longirostris, Wats. Bot. King Exp. 17, t. 2; Brew. & 

 Wats. Bot. Calif. 1. 31. — In the Great Basin from Wasliington to S. Utah. (Sonora and 

 Lower Calif.) ^ 



* * * * One or both pairs of longer filaments connate : cauline leaves more or less sagit- 

 tately auriculate, scarcely so in S. hyacinthoides : pods narrow : annuals. 



-f— Sepals in approximately equal pairs : pods ascending or spreading. 

 •M- Seeds wingless. 



S. Breweri, Gray. Glabrous and glaucous (or calyx only pubescent), 1 to 2 feet high, 

 branching : leaves mostly sessile and clasping ; the lowermost broadly spatulate with a 

 winged petiole, toothed ; the cauline ovate and acute to narrowly lanceolate, toothed or 

 entire : flowers 3 to 4 lines long, purplish : sepals acuminate : pods ascending on very short 

 pedicels, 1 to 2^ inches long liy one half line broad ; stigma sessile or nearly so ; seeds small, 

 orbicular, wholly marginless. — Proc. Am. Acad. vi. 184, excl. first form. — On Mount 

 Hamilton and San Carlos Mt., California, Brewer, 790, 1268.2 



++ ++ Seeds winged. 



= Plant glaljrous. 



S. hyacinthoides, Hook. Simple or sparingly branched, 1 to 4 feet high : leaves narrowly 

 lanceolate to linear, attenuate at base and semiamplexicaul (slightly or not at all auricu- 

 late), entire or sparingly toothed : flowers purple, 4 to 5 lines long : calyx saccate ; the 

 sepals acute : pods ascending on short pedicels, 1 to 4 inches long by a line wide, beaked 

 with a short style ; seeds oblong, winged. — Bot. Mag. t. 3516 ; Gra}^ Gen. 111. i. 146, t. 61. 

 S. glabrifolius, Buckley, Proc. Acad. Philad. 1861, 448. — Indian Territory to Central Texas. 



S. barbiger, Greene, a foot high, branched: cauline leaves linear, entire: flowers white 

 or purple, 3 to 4 lines long, on very short pedicels : calyx saccate ; sepals connivent with 

 recurved whitish tips : petals unequal : the connate pair of stamens at length exserted : fruit 

 deflexed, 2 inches long. — Pittonia, i. 217. — California, near Fout's Spring, Colusa Co., 

 Rattan; Highland Springs, Lake Co., Simonds; near St. Helena, Napa Co., Greene; fl. 

 June, July. 



S. niger, Greene. Stout, 2 to 3 feet high, much branched : leaves linear; the lower nar- 

 rowly lobed or toothed, " all sagittately clasping " : flowers purple, 4 to 5 lines long, long- 



1 S. flnrescens, Hook., doubtfully placed after S. longirostris by Dr. Watson in his preliminary 

 treatment of the genus, is here referred to Thelypodium. 



2 With the latter number of Prof. Brewer's collection, the recently published S. hesperidis, 

 Bioletti, Erythea, i. 14, corresponds in all essential characters described. 



