MUSTARD FAMILY 287 



Pods globose or subglobose, not flattened at the apex or margin. 



Annual, not rosette-forming, stems erect. 1. L. Pointer*. 



Perennials, rosette-forming, stems decumbent. 



Basal leaves abruptly narrowed to the petiole. 2. L. Kingii. 



Basal leaves gradually narrowed to the petiole. 3. L. Douglasii. 



Pods flattened at the apex and on the margin. 



Caudex stout, slightly woody; flowering stems erect or decumbent. 



Flowering stems prostrate or decumbent. 4. L. diversifolia. 



Flowering stems erect or ascending, 10-20 cm. long. S. L. occidentalis. 



Caudex little developed, annual or short-lived perennial ; flowering stems erect. 6. L. Cusickii. 



1. Lesquerella Palmeri S. Wats. Palmer's Lesquerella. Fig. 2052. 



Lesquerella Palmeri S. Wats. Proc. Amer. Acad. 23: 255. 1888. 



Lesquerella Gordonii var. sessilis S. Wats. Proc. Amer. Acad. 23: 253. 1888. 



Lesquerella tenella A. Nels. Bot. Gaz. 47: 426. 1909. 



Annual, finely stellate, the stems slender, decumbent or ascending, usually branched, 1-4 

 dm. long. Basal leaves 1-5 cm. long, entire or few-lobed, narrowed to a slender petiole; stem 

 leaves narrowly oblong-lanceolate, entire, 1-3 cm. long ; petals yellow, broadly spatulate ; fruiting 

 pedicels ascending to recurved, usually sigmoid, 8-20 mm. long; pods globose or slightly elon- 

 gated, 3-5 mm. broad, sparsely stellate ; seeds not winged. 



Sandy soils, Lower Sonoran Zone; southern Nevada and Utah south to Arizona, the California deserts- 

 and northern Lower California. Type locality: Arizona. March-May. 



2. Lesquerella Kingii S. Wats. King's Lesquerella. Fig. 2053. 



Lesquerella Kingii S. Wats. Proc. Amer. Acad. 23: 251. 1888. 



Perennial, flowering stems several, decumbent, 1-2 dm. long, ovate to rounded, entire, nar- 

 rowed to a petiole which exceeds it in length, stem leaves oblanceolate, 2 cm. long or less ; flowers 

 6-7 mm. long, style 3-5 mm. long ; fruiting raceme elongated ; pedicels sigmoid ; pods subglobose, 

 not compressed, 3-5 mm. long, sparingly stellate. 



Desert ranges, Upper Sonoran Zone; western Nevada and the Panamint and White Mountains, California 

 Type locality: West Humboldt Mountains, Nevada. May-June. 



Lesquerella bernardina Munz, Bull. S. Calif. Acad. 31 : 62. 1932. Characterized by longer petals, 9 mm 

 long, and longer style, 7-9 mm. long. Local in the San Bernardino Mountains, California. 



3. Lesquerella Douglasii S. Wats. Douglas' Lesquerella. Fig. 2054. 



Lesquerella Douglasii S. Wats. Proc. Amer. Acad. 23: 255. 1888. 



Perennial, silvery stellate throughout, flowering stems few to many from the short usually 

 simple caudex, decumbent or ascending, 10-45 cm. long. Basal leaves obovate to oblanceolate, 

 tapering to a slender petiole, entire or few-toothed ; stem leaves linear to narrowly oblanceolate, 

 1-3.5 cm. long; petals yellow, narrowly spatulate, 6-9 mm. long; fruiting pedicels 7-15 mm. 

 long, straight or sigmoid; pods subglobose, stellate, 3-4 mm. broad; seeds wingless. 



Sandy or gravelly soils, Upper Sonoran Zone; southeastern British Columbia through eastern Washington 

 to the Columbia River in eastern Oregon. Type locality : originally collected by Douglas, without locality. May- 

 July. 



4. Lesquerella diversifolia Greene. Wallowa Lesquerella. Fig. 2055. 



Lesquerella diversifolia Greene, Pittonia 4: 309. 1901. 



Perennial, with a stout caudex clothed with the persistent leaf bases of the previous year, 



densely stellate-pubescent throughout; stems usually prostrate, 4-10 cm. long, simple. Basal 



leaves 2-6 cm. long, the blade ovate to nearly orbicular, obtuse, usually abruptly narrowed to 



the petiole; stem leaves few, narrowly oblanceolate; petals yellow, 7 mm. long; pedicels 5-10 



mm. long ; pods densely stellate-pubescent, 4-6 mm. long ; ovules 2 in each cell. 



Exposed mountain slopes, Boreal Zones; Wallowa and Steens Mountains, eastern Oregon, to central Idaho. 

 Type locality: Wallowa Mountains, alt. 7,000 feet. June-Aug. 



5. Lesquerella occidentalis S. Wats. Western Lesquerella. Fig. 2056. 



Vesicaria occidentalis S. Wats. Proc. Amer. Acad. 20: 353. 1885. 

 Lesquerella occidentalis S. Wats. Proc. Amer. Acad. 23: 251. 1888. 



Perennial, silvery stellate, the flowering stems numerous from the short woody caudex, 

 decumbent or ascending, 5-20 cm. long. Basal leaves 2-7 cm. long, the blade broadly ovate to 

 lanceolate, tapering to the slender, elongated petiole, entire or repand; stem leaves oblanceolate, 

 1-1.5 cm. long, entire; petals yellow, narrowly spatulate, 9-10 mm. long; filaments linear; fruit- 

 ing pedicels strongly sigmoid, 8-15 mm. long; pods densely stellate, obovoid, compressed at the 

 apex and along the margin, 4-6 mm. long. 



Rocky hillsides, Boreal Zones; Siskiyou Mountains and northern Sierra Nevada, California. Type locality: 

 near Yreka, California. May-July. 



6. Lesquerella Cusickii M. E. Jones. Cusick's Lesquerella. Fig. 2057. 



Lesquerella Cusickii M. E. Jones, Contr. West. Bot. No. 12: 2. 1908. 



Annual or short-lived perennial, densely stellate, the flowering stems numerous, unbranched, 

 4-20 cm. long. Basal leaves 2-6 cm. long, the blade oblanceolate to rounded, entire or repand, 



