FABACEAE 627 



1. Parosela Dalea (L. ) Britton. Foliage glabrous below the inflorescence. Stems 

 simple and erect, or branched at tlie base, the branches decumbent or ascending, 2-6 dm. 

 long : leaflets 15-41, the blades oblong, cuneate or oblanceolate, 3-8 mm. long, obtuse, at 

 the apex, often cuneate at the base : spikes cylindric, 2-7 cm. long : bracts ovate to lanceo- 

 late, acuminate, hyaline-margined : calyx densely silky, about equalling the bract in 

 length : lobes linear-lanceolate, long-acuminate, plumose : corolla pink or pale violet, or 

 the standard white. [Dalea alopecvroides Willd.] 



On prairies and in dry soil, Minnesota to Alabama, Texas, New Mexico and Mexico. Spring to fall. 



2. Parosela ennedndra (Nutt. ) Britton. Foliage glabrous to the inflorescence. 

 Stems erect, 3-10 dm. tall, wand-like or usually branched, the branches ascending or 

 spreading : leaflets 5-11, the blades linear-oblong, or cuneate-oblanceolate, 5-10 mm. long, 

 glandular, obtuse or acute, involute : spikes more or less interrupted, 2-11 cm. long, 

 bracts suborbicular, about 4 mm. long, mucronate : calyx silky, conspicuously surpassing 

 the bract ; lobes filiform-subulate, plumose, much longer than the tube : corolla white ; 

 standard ovate, cordate ; wing-petals shorter than the keel : stamens 9. 



On prairies, Iowa to South Dakota, Mississippi, Texas and Colorado. ^ Spring and summer. 



3. Parosela pogondthera (A. Gray) Vail. Foliage glabrous. Stems branched at 

 the base, the branches spreading or prostrate, 5-30 cm. long, simple or branching : leaflets 

 5-11, the blades linear-oblong to oblanceolate, 5-10 mm. long, involute, obtuse or retuse at 

 the apex : spikes oblong or cylindric, 1-6 cm. long : bracts ovate, concave, mucronate, 

 pale, glandular: calyx densely pubescent, surpassing the bract; lobes setaceous or subu- 

 late, plumose, much longer than the tube : corolla purple : stamens 10. 



In dry soil. Texas to New Mexico and Mexico. Spring to fall. 



4. Parosela lasidthera (A. Gray) Heller. Foliage more or less glaucous or bright 

 green. Stems branching at the base, the branches erect or ascending, 1-3 dm. long, 

 simple or branching : leaflets 5-9, the blades linear-oblong or oblong-oblanceolate, 5-12 

 mm. long, obtuse or retuse at the apex : spikes cylindric, 3-8 cm. long : bracts ovate- 

 orbicular, 4-6 mm. long, cuspidate : calyx densely pubescent ; lobes subulate, shorter than 

 the tube : corolla purple-red. 



In dry soil, Texas to New Mexico and Mexico. Spring to fall. 



5. Parosela fonnosa ( Torr. ) Vail. Foliage glabrous. Stems woody, much branched, 

 several dm. long, zigzag, sometimes with many short lateral branches : leaves inconspicu- 

 ous, mostly about 1 cm. long : leaflets 9-12, the blades cuneate to oblong-cuneate, 2-4 mm. 

 long, thick, retuse at the apex, revolute : peduncles usually 5-10 mm. long : bracts ovate, 

 acuminate, ciliate, about 5 mm. long : spikes head-like, 6-10-flowered : calyx villous, fully 

 1 cm. long : lobes subulate-setaceous, plumose, about twice as long as the campanulate 

 tube : corolla bright purple, about 1.5 cm. long. 



In drj- soil, Texas to New Mexico. Spring and summer. 



6. Parosela Hdllii (A. Gray) Heller. Foliage strigillose. Stems more or less 

 copiously branched at the base, the branches 1-4 dm. long, ascending or spreading, 

 slender, simple or with spreading branches : leaves with petioles seldom 1 cm. long : leaf- 

 lets usually 3, the blades linear, rather narrowly so, 1-2 cm. long, acute, pale, silky : spikes 

 sessile or nearly so, 2-5 cm. long, few-flowered, 1-1.5 cm. thick, interrupted at maturity: 

 bracts ovate, acuminate, about 5 mm. long : calyx villous-hirsute, barely 1 cm. long ; lobes 

 slender-subulate, somewhat longer than the tube, slightly plumose : corolla yellow about 

 1.5 cm. long. 



On rocky prairies, Texas. Spring to fall. 



7. Parosela aiirea (Xutt. ) Britton. Foliage pubescent with whitish appressed hairs. 

 Stems often tufted, sometimes branched at the base, the branches usually simple : leaflets 

 5-9, the blades oblong, obovate or oblanceolate, 6-18 mm. long, obtuse or mucronulate, 

 ciliate : spikes oblong or ovoid, 2-7 cm. long, densely pubescent : bracts triangular-ovate 

 or ovate, boat-shaped : calyx surpassing the bracts ; lobes filiform-subulate, plumose : 

 corolla yellow ; standard shorter than the other petals. 



On prairies, South Dakota to Missouri and Texas. Spring and summer. 



8. Parosela nana (Torr. ) Heller. Foliage silky -strigillose. Stems branched at the 

 base, the branches 5-15 cm. long, ascending or spreading : leaflets 3-5, the blades obovate, 

 oblong-obovate or cuneate-oblanceolate, 5-10 mm. long, obtuse or mucronulate : spikes 

 ovoid or oblong, 1-2 cm. long, short -peduncled : bracts oval or nearly so, 3-3.5 mm. long, 

 mucronate : calyx surpassing the bracts ; lobes subulate-filiform, plumose, longer than the 

 tube : corolla white. 



In dry soil, Texas to Arizona and Mexico. Spring to fall. 



9. Parosela Wrightii (A. Gray) Vail. Foliage copiously pubescent. Stems 

 branched at the base, the branches erect or ascending, 0.5-1.5 dm. tall : leaflets 3-5, the 



