MUSTARD FAMILY 



245 



mose even in anthesis, dense, 1-6 cm. long ; pedicels stout, 3-5 mm. long, horizontal or ascending ; 

 pods somewhat flattened parallel to the septum, erect, widely spreading or recurved, 3-10 cm. 

 long, about 1 mm. wide ; stipe 2-4 mm. long. 



Upper Sonoran Zone; southern British Columbia, western and southern Idaho, eastern Washington and 

 Oreeon western Nevada, northern and southeastern California (Inyo County). Type locality: near Walla 

 Walla and at Priest's Rapid, Columbia River. April-June. This is a polymorphic species, and a number of 

 segregates have been proposed. 



9. Thelypodium integrifolium (Nutt.) Endl. 



Thelypodium. Fig. 1931. 



Entire-leaved 



Pachypodium integrifolium Nutt. in Torr. & Gray, Fl. N. Amer. 1:96. 1838. 

 Thelypodium integrifolium Endl. in Walp. Rep. 1 : 172. 1842. 

 Thelypodium lilacinum Greene, PI. Baker. 3:9. 1901. 

 Thelypodium rhomboideum Greene, Pittonia 4: 314. 1901. 

 Thelypodium affine Greene, Pittonia 4: 314. 1901. 



Biennial, glabrous throughout, the stems erect, branching, 6-15 dm. high. Basal leaves 

 oblong-elliptical, 1-3 dm. long, gradually narrowed to a broad petiole ;_ stem leaves linear- 

 lanceolate, narrowed to the base, reduced upwards and becoming linear in the inflorescence; 

 petals spatulate, about 8 mm. long, exceeding the sepals by one-half, bluish or pale rose-colored; 

 inflorescence at first corymbose, when mature somewhat elongated but remaining dense ; pedicels 

 5-8 mm. long, slender, usually somewhat wing-margined at the base, horizontal or slightly 

 ascending ; pods irregularly torulose, arcuate, ascending, 2-3 cm. long ; stipe 1-2 mm. long. 



Upper Sonoran Zone; Washington, Oregon, Nevada, and California to the Rocky Mountain region. Type 

 locality elevated plains of the Rocky Mountains toward the Oregon, as far as Walla Walla. June-Aug. 

 This is a polymorphic species which has been segregated into smaller units. (See Payson, Ann. Mo. Bot. 

 Card. 9: 276-282. 1923.) 



10. Thelypodium flavescens (Hook.) S. Wats. Yellow-flowered 



Thelypodium. Fig. 1932. 



Streptanthus flavescens Hook. Ic. PI. 1 : pi. 44. 1837. 

 Streptanthus procerus Brewer, Proc. Amer. Acad. 6: 519. 1866. 

 Thelypodium flavescens S. Wats. Bot. King Expl. 25. 1871. 

 Thelypodium Hookeri Greene, Fl. Fran. 263. 1891. 

 Thelypodium Greenei Jepson, Fl. W. Mid. Calif. 212. 1901. 

 Guillenia flavescens Greene. Leaflets Bot. Obs. 1 : 228. 1906. 



Annual, rather stout, glabrous and glaucous or sparsely hirsute, the stems erect, simple or 

 branching in the inflorescence, 3-12 dm. high. Basal leaves petioled, lanceolate to oblanceolate in 

 outline, sinuate-pinnatifid, lyrate or coarsely laciniate, 5-22 cm. long ; stem leaves sessile, shortly 

 petioled or even slightly amplexicaul, deeply toothed to subentire; inflorescence rather lax, 

 racemose; pedicels curved upwards, 5-7 mm. long; sepals pale yellow, lanceolate, acute or 

 acuminate, 7-11 mm long, glabrous; petals light yellow, 9-15 mm. long, claw rather broad, 

 blade narrow, crisped, recurved; pods erect, terete or somewhat 4-angled, glabrous or sparsely 

 hirsute, 4-8.5 cm. long; style tapering, 2-3.5 mm. long; stigma entire or slightly 2-lobed. 



Upper Sonoran Zone; Inner Coast Ranges, west-central California. Type locality: "Monterey, California." 

 March-June. 



1934 1935 



1934. Thelypodium lasiophyllum 1935. Schoenocrambe linifolia 



1936 



1936. Streptanthus campestris 



