38 CEUOIFER^B. Thely podium. 



oblong, laciniately pinnatifid or coarsely and unequally sinuate-toothed : raceme 

 long and crowded : petals linear, 3 to 5 lines long, nearly white : pod 1-J? to 2£ 

 inches long, pointed with the slender style, on short stout divaricately spreading 

 pedicels. — Macropodium laciniatum, Hook. Bot. Misc. i. 341, t. 68. Pachypodittm, 

 Nutt. 1. c. 



From Carson and Truckee Valleys to the Columbia Eiver. 



6. T. longifolium, Watson, 1. c. Erect, rather slender, 1 to 2 feet high : lower 

 leaves oblanceolate, 2 to 3 inches long, petioled, sinuately toothed, the upper linear 

 and entire : flowers scattered, on slender pedicels : sepals purplish, broad, obtuse, 2 

 lines long, a little shorter than the purple petals : filaments not exserted : anthers 

 short : pod terete, 1 to 1^ inches long, very narrow, acute with the very short style, 

 ascending. — Streptanthus longifolius, Benth. PL Hartw. 10. S. micranthits, Gray, 

 PI. Pencil. 7. 



Huevis Valley, W. Arizona (Higeloiv), to New Mexico and southward ; probably in S. E. Cali- 

 fornia. 



7. T. flavescens, Watson, 1. c. Pilose : lower leaves sinuately toothed ; the 

 upper sessile and entire, not auricled at base: sepals and pedicels hairy: pod 1£ 

 inches long, nearly terete, sparsely hirsute, beaked with the long slender style, 

 strictly erect.- — Streptanthus flavescens, Torrey in Pacif. E. Eep. iv. 65, not "Hook. 



A little known species, collected only by Bigelow near Benicia ; said to have yellowish flowers. 



An imperfect fruiting specimen, collected by Cooper at Fort Mohave, is probably to be referred 

 to this genus rather than to Sisymbrium, — well marked but not according with any known 

 species of either genus. It is glabrous above, with narrow entire leaves, sagittate at base and 

 clasping ; pods few and scattered, strongly reflexed on short pedicels, an inch long, terete and 

 rather stout, beaked with a slender style ; seed-coat gelatinous on boiling. The lower part of the 

 stem is wanting. 



11. STANLEYA, Nutt. 



Pod linear, elongated, terete, long-stipitate ; valves 1 -nerved. Seeds in one row, 



oblong, not winged ; cotyledons linear, incumbent. Sepals equal at base, narrow, 



spreading, yellow. Petals yellow, narrow, with long connivent claws. Anthers 



linear, not sagittate, at length closely coiled ; filaments much elongated. Stigma 



sessile, entire. — Stout perennials with large flowers in elongated racemes. 



A genus of but three species, confined to the interior of the continent, a single one reaching 

 the southern portions of the State. 



1. S. pinnatifida, Nutt. Glabrous : stems several from a perennial woody 

 base, 1 to 8 feet high, simple': lower leaves coarsely lyrate-pinnatifid with few 

 oblong segments ; the upper entire, lanceolate, narrowed to a slender petiole : calyx 

 3 to 4 lines long : petals half longer, the claws and stipe of the ovary somewhat 

 pubescent : pod 2 inches long, a line wide, curved, attenuate into a slender stipe 

 6 to 9 lines long, exceeding the spreading or horizontal pedicels. — Gray, Gen. Hi. 

 i. 154, t. 65. S. integrifolia, James. S. heterophylla & fruticosa, Nutt. 



Pose Creek (Heermann) ; Santa Barbara Co. (Torrey) ; Fort Mohave (Cooper) ; and north and 

 eastward through the interior to the Snake Eiver, the Upper Missouri and New Mexico. Califor- 

 nian specimens have the leaves all narrow and entire, and the pods horizontally recurved, corre- 

 sponding to the figure of the Arizona plant in Sitgreaves Eep. t. 1. 



S. vif.idiflora, Nutt., is known by its lanceolate sessile and clasping stem-leaves, the radical 

 ones obovate or lanceolate, entire or with a few runcinate teeth toward the base ; calyx and petals 

 greenish yellow ; pod torulose. It is found in the valleys of Northern Nevada and north and 

 eastward, and may occur in Northeastern California. 



12. ERYSIMUM, Linn. 

 Pod 4-angled by the prominent midnerve of the valves, not stipitate. . Seeds in 

 one row, oblong, not margined ; cotyledons incumbent or oblique. Sepals erect, 



