GENUS 18. 



PEA FAMILY. 



i. Parosela enneandra (Nutt.) Britton. 

 Slender Parosela. Fig. 2507. 



Dalea enneandra Nutt. Eraser's Cat. 1813. 



Dalea laxi flora Pursh, Fl. Am. Sept. 741. 1814. 



P. enneandra Britton, Mem. Torr. Club 5 : 196. . 1894. 



Erect, glabrous, i-4 high, with numerous slender 

 ascending branches. Leaflets 5-11, linear or linear- 

 oblong, obtusish, 2 "-5" long, Y'-i" wide, narrowed 

 at the base, nearly sessile ; spikes numerous, 2'-$' 

 long, loosely flowered; bracts obtuse, nearly orbicu- 

 lar, punctate, membranous-margined, li" long, often 

 mucronate ; flowers 4"-6" long ; calyx-teeth subulate, 

 beautifully plumose, shorter than the white corolla; 

 standard small, cordate; keel exceeding the wings; 

 stamens 9. 



Prairies, Iowa to South Dakota and Colorado, south to 

 Mississippi and Texas. June-Aug. 



2. Parosela lanata (Sprang.) Britton. 

 Woolly Parosela. Fig. 2508. 



Dalea lanata Spreng. Syst. Veg. 3 : 327. 1826. 



D. lanuginosa Nutt. ; T. & G. Fl. N. A. i : 307. 1838. 



P. lanata Britton, Mem. Torr. Club 5: 196. 1894. 



Decumbent, branching, softly and densely pu- 

 bescent throughout, i-2 long. Leaflets 9-13, 

 obovate, obtuse, truncate or emarginate at the 

 apex, narrowed or cuneate at the base, nearly 

 sessile, 4"-6" long, about 2" wide above; spikes 

 numerous, short-peduncled, i'-4' long, rather 

 loosely flowered ; bracts oval or obovate, long- 

 acuminate or mucronate, about li" long; flowers 

 3" long ; corolla deep purple or red ; calyx-teeth 

 subulate, plumose ; standard cordate, slightly ex- 

 ceeding the wings and keel; stamens 10. 



Prairies, Kansas to Texas, Utah and New Mexico. 

 Summer. 



3. Parosela Dalea (L.) Britton. Pink Paro- 

 sela. Fig. 2509. 



Psoralea Dalea L. Sp. PI. 764. 1753. 



Dalea alopccuroides Willd. Sp. PI. 3: 1336. 1803. 



Parosela Dalea Britton, Mem. Torr. Club. 5: 196. 1894. 



Erect, branched, i-2 high, foliage glabrous. 

 Leaflets 15-41, oblanceolate or linear-oblong, obtuse 

 at the apex, narrowed at the base, sessile or nearly 

 so, 2"-3" long, \"-\" wide; spikes terminal, oblong, 

 very dense, i'-2 r long, about 5" thick, peduncled; 

 bracts ovate or lanceolate, acuminate, deciduous, 

 about equalling the calyx, hyaline-margined; calyx 

 very silky-pubescent, its teeth linear-lanceolate, acu- 

 minate, plumose; corolla pink, or whitish, about 2" 

 long; keel about equalling the wings. 



Prairies, Illinois to Minnesota, Nebraska, South Da- 

 kota, Alabama, Texas, Arizona and Mexico. Aug.-Sept. 



