126 PULSE FAMILY. 



M. dlba, Lam. WHITE M., BOKHARA or TREE CLOVER. 3-6 high, 

 branching ; leaflets obovate or oblong, truncately notched at the end ; 

 white flowers in loose racemes. Has been cult, for green fodder, ami 

 now as a " bee plant." 



M. officinalis, Willd. YELLOW M. 2-3 high, with merely blunt 

 leaflets and yellow flowers. 



13. MEDICAGO, MEDICK. (The name of Lucerne, because it came 

 to the Greeks from Media.} All natives of the Old World ; a few have 

 run wild here. Flowers all summer. 



* Flowers violet-purple or bluish. 11 



M. satlva, Linn. LUCERNE, ALFALFA. Cultivated for green fodder, 



especially S. ; stems erect, l-2 high, from a long, deep root ; leaflets 



obovate-oblong ; racemes oblong ; pod several-seeded, linear, coiled about 



* * Flowers yellow. @ 



M. lupullna, Linn. BLACK MEDICK, NONESUCH. Low, spreading, 

 downy, with wcdge-obovate leaflets, roundish or at length oblong heads 

 or spikes of small flowers, and little kidney-shaped, 1-seeded pods turning 

 black when ripe. Waste places. 



M. maculata, Willd. SPOTTKD M. Spreading or trailing; somewhat 

 pubescent leaflets, broadly inversely heart-shaped, marked with a dark 

 spot ; peduncles 3-5-flowered ; pod flat, compactly coiled three or more 

 turns, its thickish edge beset with a double row of curved prickles. Waste 

 places, N. Eng. 



M. denticulata, Willd. Like the last, but nearly glabrous ; pod loosely 

 coiled, deeply reticulated, with a sharp edge. Same range. 



14. TRIFOLIUM, CLOVER, TREFOIL. (Latin name: three leaflets.) 



* Flowers sessile in dense heads; corolla tubular, withering away after 



flowering. 



t- Calyx-teeth silky-plumose, longer than whitish corolla. 



T. arvense, Linn. RABBIT FOOT or STONE C. Erect, 5'-10' high, silk- 

 downy, especially the oblong or at length cylindrical grayish heads or 

 spikes ; leaflets narrow. Eu. 



t- *- Calyx scarcely hairy except a bearded ring in throat ; shorter than 

 rose-purple, long-tabular corolla / flowers sweet-scented, in summer. 11 



T. pratense, Linn. .RED C. Stems ascending ; leaflets obovate or oval, 

 often notched at the end and with a pale spot on the face ; head closely 

 surrounded by the uppermost leaves. Eu. Extensively cult, in meadows. 



T. medium, Linn. ZIGZAG C., MAMMOTH C. Like the last, but stem 

 zigzag ; leaves oblong, entire, spotless ; head usually stalked. Eu. Dry 

 hills, Nova Scotia to E. Mass. 



* * Flowers short-pediceled (reflexed when old"), persistent and turning 

 brownish in round umbels or heads, on slender naked peduncles ; corolla 

 white, rose-color or red. 



T. refl^xum, Linn. BUFFALO C. Wild S. and especially W. ; some- 

 what downy ; stems ascending, 6 '-12 X high ; leaflets obovate-oblong, finely 

 toothed ; heads and rose-red and whitish flowers fully as large as in Red 

 Clover ; calyx-teeth hairy ; pods 3-5-seeded. (i) (2) 



T. stolonlfemm, Muhl. RUNNING BUFFALO C. Smooth; some of the 

 stems forming long runners ; leaflets broadly obovate or obcordate ; flowers 

 white, barely tinged with purple ; pods 2-seeded. ^ Prairies and oak- 

 openings, W. 



