Vou. II.J MUSTARD FAMILY. 137 
3. Lesquerella argéntea (Pursh) 
MacM. Silvery Bladder-pod. 
(Fig. 1747.) 
Myagrum argenteum Pursh, Fl. Am. Sept. 434. 
1814. 
Vesicaria argentea DC. Syst. 2: 297. 1821. 
Lesquerella Ludoviciana S$. Wats. Proc. Am. 
Acad. 23: 252. 1888. 
wage argentea MacM. Met. Minn. 263. 
1892. 
Biennial or perennial, tufted, nearly sim- 
ple, 6/-18’ high, densely stellate-pubescent 
throughout. Leaves linear, oblong or ob- 
lanceolate, the lower 2’-3/ long, blunt, entire 
or sparingly repand-toothed; flowers yellow; 
petals 3’’ long; pedicels slender, 8’’-12’” long 
in fruit, spreading or recurved; pod slightly 
stipitate, stellate-pubescent, globose to oval, 
2//-214’ long; style about equalling the pod. 
Prairies, Minnesota, Nebraska and Kansas, 
west to Dakotaand northern Arizona. May-June. 
5. Lesquerella ovalifolia Rydberg, 
sp. Oval-leaved Bladder-pod. 
(Fig. 1749.) 
Perennial froma tufted caudex, pale, densely 
stellate-canescent. Basal leaves tufted, broadly 
4. Lesquerella gracilis (Hook.) S. 
Wats. Slender Bladder-pod. 
(Fig. 1748.) 
Vesicaria gracilis Hook. Bot. Mag. P/. 3533. 
1836. 
Lesquerella gracilis §. Wats. Proc. Am. Acad. 23: 
253. 1888. 
Weak, green, stem slender, 1o/-20’ high, 
freely branching, sparsely stellate-pubescent. 
Leaves linear or oblanceolate, the lower slightly 
petioled, the upper sessile, 9/’-2’ long, their 
margins often undulate; flowers yellow; petals 
about 3/’ long; pedicels spreading, sometimes 
1’ long in fruit, ascending or upwardly curved; 
pod globose, glabrous, 2/’ in diameter, stipitate 
at the end of the pedicel; style 2’” long; seeds 
several in each cell. 
Prairies, Nebraska to Texas. March-—May. 
Nn. 
oval to obovate, sometimes nearly orbicular, 
entire, obtuse or subacute, 1/-2’ long, narrowed 
into rather long petioles; stem-leaves distant, 
sessile, or the lowest short-petioled, linear-ob- 
lanceolate or narrowly spatulate; fruiting pedi- 
cels comparatively stout, ascending, 6//—10/’ 
long; pods very short-stipitate, subglobose, ob- 
tuse, 214/’-3/’ in diameter, glabrous; style about 
3/ long; seeds about 6 in each cell. 
In dry soil, Kimball Co., Neb. (Rydberg, no. 22, 
1891). This has been confounded with 
Lesquerella Engelmanni (A. Gray) S. Wats., of 
Texas and Colorado, said to occur in western Kan- 
sas. It differs in the simpler and taller (12'~18' ) 
habit and narrower ovate or oblong leaves. 
