368 BRASSICACEAE 



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, torulose; 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. integn 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. platypodum. 



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. Dry plains: Neb. 'N.M. 



Calif. Wash. Plain Submont. 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. Thelypodium 

 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 corymbiform, 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 lyrately 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 Wrightii A. Gray. River bottoms: Colo. N.M. Ariz. Utah. Son. 

 Submont. Je-Au. 



54. STANLEYA Nutt. PRINCE'S PLUME. 



Leafy perennials, usually more or less glaucous. 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. 



