94 LEGUMINOSiE. (PVLSE FAMILY.) 



toothed; peduncles 3 - 5-Jlowered ; flowers yellow; pods compactly spired, of 2 or 3 

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

 cuiTod prickles. Ci — Introduced with wool into waste grounds in sonae places. 

 (Adv. from Eu.) 



4. M. DENTictJLiTA, 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. PSORAliEA, L. Psoralea. 



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

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

 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. 

 Eoot sometimes tuberous and faiinaceous. (Name from TJfwpaKtos, scurfy, from 

 the glands or dots.) 



* Leaves pinnatdy Zfoliolaie. 



1. P. On61>rychiS, Nutt. Nearly smooth and free from glands, erect 

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

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

 pods roughened and wrinkled. — Kiver-bauks, Ohio and southwestward. July. 

 — Flowers very small. 



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

 fuse ; leaflds ovate-eUiptical, i-eticulatod ; stipules ovate ; flowers in heads on axil- 

 lary ratlier short peduncles ; bracts broadly ovate, sharp-pointed, — Rocks, Palls 

 of the Ohio, Kentucky. June. 



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 palmately 3 - 5-foliolate. 



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

 (2° -4° high), minutely hoary-pubescent wlien young; leaflets varying from linear 

 to obovate-oblong (J'-lJ' 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. arg:opliylla, Pursh. Silvery silky-white all over, erect, divergently 

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

 of the calyx and bi-acts 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 Tub- 

 nip, PoMME Blanche, or Pomme de Praieie, used as food by the aborigi- 

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



