FABACEAE. 



VOL. II. 



2. Amorpha nana Nutt. Fragrant or Dwarf 

 False Indigo. Fig. 2505. 



Amorpha nana Nutt. Fras. Cat. 1813. 



Amorpha microphylla Pursh, Fl. Am. Sept. 466. 1814. 



A low bushy shrub, seldom more than i high, gla- 

 brous or nearly so throughout. Leaves short-petioled, 

 numerous, i'-3' long; leaflets 13-19, rigid, short- 

 stalked, oval or oblong, rounded or emarginate and 

 mucronate at the apex, obtuse or acute at the base, 

 3"-6" long, ii"-2i" wide; spike-like racemes commonly 

 solitary ; flowers fragrant ; standard purplish, about 2" 

 long ; calyx-teeth acuminate; pod short, i-seeded. 



Prairies and plains, Iowa to Minnesota, Manitoba, Kan- 

 sas and Colorado. May. 



3. Amorpha canescens Pursh. Lead-plant. 

 Wild tea. Shoestrings. Fig. 2506. 



Amorpha canescens Pursh, Fl. Am. Sept. 467. 1814. 



A bushy shrub, i-3 high, densely white-canescent 

 all over. Leaves sessile or very nearly so, numerous, 

 2'-4' long; leaflets 21-51, approximate, almost sessile, 

 oval or short-lanceolate, obtuse or acutish and mucron- 

 ulate at the apex, rounded or truncate at the base, 4"-7" 

 long, 2"-3" wide, less pubescent above than beneath ; 

 spikes usually densely clustered, z'-j' long; calyx-teeth 

 lanceolate ; standard bright blue, nearly orbicular or ob- 

 cordate, about 2" long; pod slightly exceeding the calyx, 

 i-seeded. 



Prairies, Indiana to Minnesota, North Dakota and Mani- 

 toba, south to Kansas, Colorado, Louisiana and New Mexico. 

 Named from its leaden-hue, not as indicative of lead. July- 

 Aug. 



18. PAROSELA Cav. Desc. 185. 1802. 

 [DALEA Willd. Sp. PI. 3: 1336. 1803.] 



Herbs, or sometimes shrubs, with usually glandular-punctate foliage, odd-pinnate leaves, 

 minute stipules, and small purple white or yellow flowers in terminal or lateral spikes. 

 Calyx-teeth nearly equal ; standard cordate or auriculate, clawed ; wings and keel mainly 

 exceeding the standard ; adnate by their claws to the lower part of the stamen-tube. Stamens 

 10 or 9, monadelphous ; anthers uniform. Ovary sessile or short-stalked; ovules 2 or 3; style 

 subulate. Pod included in the calyx, membranous, mostly indehiscent and i-seeded. [Ana- 

 gram of Psoralea.] 



Perhaps 150 species, natives of western North America, Mexico and the Andean region of South 

 America. In addition to the following some 50 others occur in the western United States. Type 

 species : Dalea obovatifolia Ort. 



Spikes elongated, narrow, loosely flowered. 



Foliage glabrous ; corolla white; leaflets linear. i. P.enneandra. 



Foliage pubescent ; corolla purple ; leaflets obovate. 2. P. lanata. 



Spikes oblong, thick, densely flowered. 



Foliage glabrous; corolla pink or white ; leaflets 15-41. 3. P. Dalea. 



Foliage pubescent ; corolla yellow to red ; leaflets 3-9. 



Pl?nt i 2 high: calyx-teeth acuminate. 4. P.aurea. 



Plants not over 10" high; calyx-teeth aristate. 5. P. nana. 



