78 DICOTYLEDONOUS PLANTS. 



HAB. Hills, near Boston. Big. July. f?. Suffruticosc. Stem 

 a foot high, with numerous branches. Flowers on the upper 

 part of the branches, nearly sessile, yellow. Said to afford a 

 fine yellow dye. Introduced. Dyer's Weed. 



4. MEDICAGO. Linn. 



Calyx subcylindric, 5 cleft. Keel somewhat remote from 

 the standard. Stamens diadelphous. Legume many-seeded, 

 varying in form, always falcate or twisted into a spiral. 

 Leaves ternate. Diadtlphia. Dccandria. 



1. Af. htpulina Linn. : stem procumbent ; leafets obovatc-cuneate, 

 denticulate at the apex ; stipule lanceolate, acute, somewhat entire ; 

 peduncles in racemed-spikes ; flowers sessile ; legumes reniforin, 

 1-seeded, veined and rugose ; seeds ovate, somewhat reniform. 



HAB. Fields. Throughout the U. S. June Aug. Spikes 

 mail, yellow. Introduced. None-such. 



8. M. interiexia WiUd. : stem procumbent ; leafets obovate, toothed ; 

 stipules ciliate-toothed ; peduncles somewhat . 2-flowered ; legume 

 pilose, cochleate, membranaceous, obliquely reticulate ; spines straight, 

 thick, rigid and acute. 



HAB. Sandy fields. Conn, and Car, July, Aug. . Flowers 

 yellow. Introduced. 



5. MELILOTUS. Tourn. 



Calyx tubular, 5-toothed. Keel simple ; wings shorter 

 than the standard. Legume as long as the calyx, coriaceous, 

 one or few-seeded, scarcely dehiscent, varying in form. 

 Leaves ternate. Diadelphia. Dccandria. 



1. M. ofiicinalis llVld. : stem erect, branching ; leafets lanceolate-ob- 

 long, obtuse, remotely serrate ; spikes axillary, paniculate ; legume 

 2-seeded, rugose ; style filiform, as long as the legume ; seeds unequal- 

 ly cordate. Trifolium ojficinale, var. a. Linn. 



HAB. Fields. N. S. Aug. .Stem 24 feet high. Flmcrrs 

 in long racemes, yellow. Plant giving out an odour when dry, 

 similar to the vernal grass. Introduced. Yellow Mclilot, 



2. M. leucantha DC Cand. : stem erect, branched ; leafets ovate-oblong, 

 truncate and mucronate at the apex, remotely serrate ; stipules seta- 

 ceous ; teeth of the calyx unequal, as long as the tube ; standard 

 longer than the keel and wings ; legume 1-seeded, ovate, lacunose- 

 rugose, green ; seeds exactly ovate. M. vvlgaris Willd. Enum. Tri- 

 folium officinal*, var. b. Linn. 



HAB. Fields. N. S. July, Aug. $.Stem 35 feet high. 

 Flowers white. Raceme longer and less crowded than in the 

 former. Both species become fragrant x upon drying. Intro- 

 duced. ? White Mclilot. Scented Clover. 



