130 LEGUMINOS^. (pulse FAMILY.) 



M. LUPULiNA, L. (Black Medick. Nonesuch.) Procumbent, pubes- 

 cent, annual ; leaflets wedge-obovate, tootbed at the apex ; flowers in short 

 spikes (yellow); pods kidney -form, 1 -seeded. — AVaste places, N. Eng. to Fla., 

 west to Mich., loAva, and Mo. (Adv. from Eu.) 



M. macuiAta, AVilld. (Spotted Medick.) Spreading or procumbent 

 annual, somewhat pubescent ; leaflets obcordate, with a purple spot, minutely 

 toothed ; peduncles 3 - bflowered ; floAvers yellow ; pods compactli/ spiral, 

 of 2 or 3 turns, compressed, /((/Tou-'ec/ on the thick edge, said fringed with a 

 double row of curved prickles. — N. BrunsAvick to Mass. (Adv. from Eu.) 



M. denticuiAta, VVilld. Nearly glabrous ; pods loosely spiral, deeply 

 reticulated, and with a thin keeled edge; otherwise like the last, and with the 

 same range. (Adv. from Eu.) 



12. HO S A OKI A, Douglas. 



Calyx-teeth nearly equal. Petals free from the diadelphous stamens ; stand- 

 ard ovate or roundish, jts claw often remote from the others ; Avings obovate 

 or oblong ; keel incurved. Pod linear, compressed or somewhat terete, sessile, 

 several-seeded. — Herbs, Avith pinnate leaves (in ours 1 - 3-foliolate, Avith gland- 

 like stipules), and small yelloAv or reddish floAA'ers in umbels (ours solitary) 

 upon axillary leafy-bracteate peduncles. (Named for Dr. David Hosack, of 

 NeAV York.) 



1. H. Purshiana, Benth. Annual, more or less silky-villous or gla- 

 brous, often 1° high or more; leaves nearly sessile, the 1-3 leaflets OA'ate to 

 lanceolate (3 - 9" long) ; peduncles often short, bracteate with a single leaflet. 

 — N. C. ; S. W. Minn, to Ark., and Avest to the Pacific. Very variable. 



13. PSORALEA, L. 



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

 sometimes monadelphous. Pod seldom longer than the calyx, thick, often 

 Avrinkled, indehiscent, 1-seeded. — Perennial herbs, usually sprinkled all over 

 or roughened (especially the calyx, pods, etc.) Avith glandular dots or points. 

 Leaves mostly 3 - 5-f oliolate. FloAvers spiked or racemed, Avhite or mostly 

 blue-purplish. Root sometimes tuberous and farinaceous. (Name, ^upaXeos, 

 scurfy, from the glands or dots.) 



* Leaves pinnately 3-foIiolate. 



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

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

 bracts aid-shaped ; racemes elongated ; peduncle shorter than the leaves : pods 

 roughened and Avrinkled. — River-banks, Ohio to 111. and Mo. ; also south and 

 east to S. C. 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, S. Ind. 

 and Ky. June, July. 



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

 dular; stems erect (1 -2° high), slender; leaflets lanceolate or narroivly oblong ; 

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

 taper-pointed ; pods strongly Avrinkled transversely. — Dry soil, Fla. to Teun., 

 S. Ind. and Kan. June. 



