LEGUMINOSjE. (pulse family.) 129 



Leaves mostly 3 - 5-foliolate. Flowers spiked or racemed, white or mostly 

 blue-purplish.- Root sometimes tuberous and farinaceous. (Name, ^wpaAe'or, 

 scurfy, from the glands or dots. ) 



* Leaves pinnately 3-foliolate. 



1. P. Onobrychis, Nutt. Nearly smooth and free from glands, erect 

 (3° -5° high) ; leaflets lanceolate-ovate, taper-pointed (3' long) ; stipules and bracts 

 awl-shaped ; racemes elongated ; peduncle shorter than the leaves ; pods rough- 

 ened and wrinkled. — River-banks, Ohio to 111. and southward. July. 



2. P. stipulata, Torr. & Gray. Nearly smooth and glandless ; stems dif- 

 fuse ; leaflets ovate-elliptical, reticulated ; stipules ovate ; flowers in heads on rather 

 short peduncles ; bracts broadly ovate, sharp-pointed. — Rocks, Falls of the Ohio, 

 Kentucky. June, July. 



3. P. melilotoides, Michx. Somewhat pubescent, more or less glan- 

 dular ; stems erect (l°-2° high), slender; leaflets lanceolate or narrowly oblong; 

 spikes oblong, long-peduncled ; stipules awl-shaped; bracts ovate or lanceolate, 

 taper-pointed ; pods strongly wrinkled transversely. (Also P. eglandulosa, Ell) 

 — Dry soil, Ohio to Illinois, Virginia, and southward. June. 



* * Leaves palmate! y 3 - 5-foliolate. 



4. P. floriblinda, Nutt. Slender, erect, much branched and bushy (2°- 

 4° high), minutely hoary-pubescent when young ; leaflets varying from linear to 

 obovate-oblong (j'-l£' long), glandular-dotted; racemes panicled; lobes of the 

 calyx and bracts ovate, acute ; pod glandular. — Prairies of Illinois and south- 

 westward. June- Sept. — Flowers 2" or 3" long. 



5. P. argophylla, Pursh. Silvery silky-white all over, erect, divergently 

 branched (l°-3° high); leaflets elliptical-lanceolate; spikes interrupted; lobes 

 of the calyx and bracts lanceolate. — High plains, N. Wisconsin, and westward. 

 June. — Flowers 4" - 5" long." 



6. P. esculenta, Pursh. Rough sh hairy all over; stem stout (5' -15' 

 high) and erect from a tuberous or turnip-shaped farinaceous root ; leaflets 5, 

 obovate- or lanceolate-oblong ; spikes oblong, dense, long-peduncled ; lobes of the 

 calyx and bracts lanceolate, nearly equalling the corolla (i' long). — High 

 plains, N. W. Wisconsin, Mr. Spears, T. J. Hale, &c, and westward. June. 

 The Pomjie blanche, or Pomsie de Prairie, of the Voyageurs. 



8. DALE A, L. Dalea. 



Calyx 5-cleft or toothed. Corolla imperfectly papilionaceous : petals all on 

 claws : the standard heart-shaped, inserted in the bottom of the calyx : the keel 

 and wings borne on the middle of the monadelphous sheath of filaments, which 

 is cleft down one side. Stamens 10, rarely 9. Pod membranaceous, 1-seeded, 

 indehiscent, enclosed in the persistent calyx. — Mostly herbs, more or less glan- 

 dular-dotted with minute stipules ; the small flowers in terminal spikes or heads. 

 (Named for Thomas Dale, an English botanist.) 



1. D. alopeCUTOides, Willd. Erect annual (l°-2° high), glabrous, 

 except the dense and cylindrical silky-villous spike ; leaves pinnate, of many 

 linear-oblong leaflets ; corolla whitish. — Alluvial soil, Illinois and southward. 

 July. (Numerous species occur farther southwest.) 



