94 LEGUMINOS2E. (PULSE FAMILY.) 



toothed ; peduncles 3 - 5-flowered ; flowers yellow ; pods compactly spiral, of 2 or 3 

 turns, compressed, furrowed on the thick edge, and fringed with a double row of 

 curved prickles. (JD Introduced with wool into waste grounds in some places. 

 (Adv. from Eu.) 



4. M. DENTICULATA, Willd. Nearly glabrous; pods loosely spiral, deeply 

 reticulated, and with a thin keeled edge: otherwise like the last. Sparingly in- 

 troduced into New England, &c. (Adv. from Eu.) 



7. PSORALEA, L. PSOBALEA. 



Calyx 5-cleft, persistent, the lower lobe longest. Stamens diadelphous or 

 sometimes monadelphous : the 5 alternate anthers often imperfect. Pod seldom 

 longer than the calyx, thick, often wrinkled, indehiscent, 1 -seeded. Perennial 

 herbs, usually sprinkled all over or roughened (especially the calyx, pods, &c.) 

 with glandular dots or points. Leaves mostly 3 - 5-foliolate. Stipules cohering 

 with the petiole. Flowers spiked or racemed, white or mostly blue-purplish. 

 Boot sometimes tuberous and farinaceous. (Name from ^copaXeos, scurfy, from 

 the glands or dots.) 



* Leaves pinnatdy 3-foliolate. 



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

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

 awl-shaped ; racemes axillary, elongated ; peduncle shorter than the leaves ; 

 pods roughened and wrinkled. River-banks, Ohio and southwestward. July. 



Flowers very small. 



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

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

 lary rather short peduncles ; bracts broadly ovate, sharp-pointed. Rocks, Falls 

 of the Ohio, Kentucky. June. 



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

 dular; stems erect (l-2high), 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 palmately 3 - 5-foliolate. 



4 P. fioiibunda, Nutt. Slender, erect, much branched and bushy 

 (2 C -4 high), minutely hoary.-pubescent when young; leaflets varying from linear 

 to obovate-oblong ('-!' long), glandular-dotted; racemes panicled; lobes of 

 the calyx and bracts ovate, acute; pod glandular. Prairies of Illinois and 

 southwestward. June - Sept. Flowers 2" or 3" long. 



5. P. argopliylla,, 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, Falls of St. Anthony, Wis- 

 consin? and westward. June. Flowers 4" -5" long. 



P. ESCULENTA, Pursh., of the same region as the last, the INDIAN TCR- 

 NIP, POMME BLANCHE, or POMME DE PRAIRIE, used as food by the aborigi 

 nes, may possibly occur on the Wisconsin side of the Mississippi. 



