368 BRASSICACEAE 



■m 



as long as the sepals; pods filiform, 6-10 cm. long, erect or nearly so; stipe and 

 style each 2-3 mm. long. Rich slopes: Ida.— Wash.— Ore.— Nev. Son. My- 



Je. 



10. T. utahense Rydb. Annual or biennial; stem 4^6 dm. high, sparingly 

 pubescent below; leaves all lanceolate in outline,. 5-10 cm. long, lanceolate, gla- 

 brous; segments oblong-lanceolate to triangular; pedicels very short, in fruit 

 scarcely more than 1 mm. long; petals spatulate, 4 mm. long, white; pod about 

 3 cm. long. Arid regions: s Utah. L. Son. Ap. 



52. PLEUROPHRAGMA Rydb. 



Tall glabrous perennials or biennials, with paniculate inflorescence and thick 

 entire leaves. Basal leaves oblanceolate or spatulate; stem-leaves linear-lance- 

 olate, sessile, but not clasping. Sepals ascending, thin, more or less petaloid. 

 Petals white or purplish, with slender claws. Filaments subulate, white, with 

 conspicuous glands at their bases; anthers linear, sagittate at the base, curved. 

 Receptacle dilated. Pod slender, terete, tonilose; stipe short; style short, slender; 

 stigma minute, entire; septum with a strong midrib. 



Pedicels not flattened, about 1 cm. long. 



Stipe 0.5-1 mm. long; inflorescence short. 1. P. iniegri folium. 



Stipe 2-3 mm. long; inflorescence elongate. 2. P. gracilipes. 



Pedicels flattened at the base, about 3 mm. long; stipe 1-2 mm. long. 



3. P. plaUjpodum. 



1. P. integrifolium (Nutt.) Rydb. Perennial, with a taproot; stem simple, 

 strict or branched above, 6-20 dm. high; basal leaves 5-30 cm, long; stem-leaves 

 4-10 cm, long; inflorescence paniculate, at first corymbiform; pedicels in fruit 

 spreading; petals 6-7 mm. long; pod 2,5-3 cm. long, 1-1.5 mm. thick. Thely- 

 podium integrifolium Endl. ? T. lilacinum Greene. Dr>^ plains: Neb. — N.M. 

 —Calif. — Wash. Plain — Suhmont, Jl~Au. . 



2. P. gracilipes (Robins.) Rydb. Perennial, resembling the preceding, but 

 more slender, about 5 dm. high; inflorescence more elongate; flowers smaller; 

 pod more slender, less than 1 mm. thick, and with longer stipe, Thelypodiuin 

 integrifolium gracilipes Robins. Wet ground: Colo. — N.M. Son, 



3* P. platypodum Rydb. Glabrous perennial, with a taproot; stem simple 

 up to the inflorescence, 1-2 m. high; basal leaves 5-10 cm. long, entire; stem-leaves 

 3-6 cm. long; inflorescence paniculate; racemes dense, at first cor^Tubiform, in 

 fruit about 1 dm. long; petals white, 6-7 mm. long; pod 1.5-2 cm. long, 1-1.5 

 mm. thick, torulose. Arid regions: Utah — ^Ariz. Son, 



53. STANLEYELLA Rydb. 



Tall branched biennials. Leaves thin, the lower ones lyratel}' pinnatifid, 

 the upper entire. -Sepals thin, petaloid, white, oblong or linear, spreading or 

 even reflexed in anthesis. Petals white, with oblanceolate or spatulate blades 

 gradually tapering into a short claw. Filaments distinct, filiform; anthers 

 linear, sagittate at the base, soon more or less spirally recurved. Pod slender, 

 terete with short stipe and short style; stigma small, truncate or nearly so. 

 Cotyledons incumbent and somewhat conduplicate. 



1. S. Wrightii (A. Gray) Rydb. Biennial; stem 6-15 dm. high, much 

 branched, sparingly hairy below; basal leaves 1-1.5 dm. long, lyrate-pinnatifid, 

 with lanceolate or elongate, triangular toothed lobes; stem-leaves less lobed or 

 the upper entire, linear-lanceolate; petals white, 6 mm. long; pedicels in fruit 

 divergent, 10-15 mm. long; pod 5-7 cm. long, less than 1 mm. thick. Thely- 

 podium Mrightii A. Gray. River bottoms: Colo.— N.M.— Ariz.— Utah. Son. 

 —Suhmont. Je-Au, 



54. STANLEYA Nutt. Prince's Plume. 



Leafy perennials, usually more or less glaucoxis. Flowers perfect in elongate, 

 many-flowered racemes.- Sepals oblong, widely spreading in anthesis. Petals 

 with long claw and narrow elongate blades. Stamens 6; filaments elongate. 



