130 LEGUMINOS.E. (PULSE FAMILY.) 



M. LUPULINA, L. (BLACK MEDICK. NONESUCH.) Procumbent, pubes- 

 cent, annual; leaflets wedge-obovate, toothed at the apex; floicers in short 

 spikes (yellow); pods kidney-form, 1-seeded. Waste places, N. Eng. to lla., 

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



M. MACULA.TA, Willd. (SPOTTED MEDICK.) Spreading or procumbent 

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

 toothed; peduncles 3 - b-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. N. Brunswick to Mass. (Adv. from Eu.) 



M. DENTICULATA, Willd. 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. HOSACKIA, Douglas. 



Calvx-teeth nearly equal. Petals free from the diadelphons stamens ; stand- 

 ard ovate or roundish, its claw often remote from the others ; wings obovate 

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

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

 like stipules), and small yellow or reddish flowers in umbels (ours solitary) 

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

 New York.) " 



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

 brous, often 1 high or more; leaves nearly sessile, the 1-3 leaflets ovate to 

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

 N. C. ; S. "W. Minn, to Ark., and west to the Pacific. Very variable. 



13. PSORALEA, L. 



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

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

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

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

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

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

 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 

 roughened and wrinkled. 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 (\ -'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. Dry soil, Fla. to Tenn., 

 S. Ind. and Kaii. June. 



