LEGUMIN0SJ3. 91 



diadelphous (9 to 1). Legume small, scarcely dehiscent, 

 often ovate, 1 to 6-seeded, covered by and scarcely longer 

 than the calyx. Seeds roundish. — Tufted or diffuse lierbs, 

 with palmately trifoliate leaves, with straight, scarcely reticu- 

 lated veins, and flowers chiefly in dense heads or spikes. 



* Flowers sessile in compact heads; corolla purple or purplish, deciduous or witi* 

 tring. 



1. T. pratense, L. Red Clover. 



St<ms sub-crcct, branched ; leaves on long petioles, oval, entire, often notched at 

 the end, and marked with a pale spot; heads of flowers orate, dense, nearly sessile; 

 tut h of the calyx setaceous, the lowest longer thau the rest. 



Meadows and fields; largely cultivated, and naturalized. May — Oct. Per. SUms 

 1 to 2 feet high. Flowers united into a tube at base, rose-colored, fragrant. Seeds 

 yellowish. Native of Europe. 



2. T. Pennsylvanicum, Willd. 



Stem ascending, much branched, flexuous, leaflets ovate.elliptic, obtuse, very 

 entire: stipules owned; heads of flywers ovate-cylindric, solitary, dense; lower teeth 

 of the calyx shorter than the corolla. 



Woods. June — Sept. Per. Flowers fine red. Resembles T. medium of Lin- 

 nseus. Introduced. Beck"sBot. I suspect this to be merely a variety of T. pratense. 



3. T. ARYENSE, L. Rahhit-foot Clover. Stone Clover. 



Stem branching; leaflets otovate-linear or narrowly wedge-form, minutely 3-tooth- 

 ed at the apex: stipules oval acuminate ; spiles oblong-cylindric, very villous; 

 calyr-teeth longer than the corolla plumose, woolly. 



Old fields and roadsides; common; naturalized. May — Sept. Annual. Stem 6 

 to l'_' inches high, much branched round, hairy. Leaves hairy, in short petioles. 

 Leaflets narrow, ]4 to 1 inch long. Heads x / 2 to \% inches long becoming greyish 

 and very softly woolly. Flowers minute white or pink. 



* * Corolla white or yellow ; flowers in umbel-Wit round heads on a naked peduncle. 



4. T. repens, L. White Clover. 



Smooth, the slender stem spreading and creeping; leaflets inversely heart-shaped, 

 iomewhat retuse, serrulate, mucronate; stipidzs scale-like narrow; petioles and 

 especially the peduncles, very long; heads small and loose; flowers pedicelled. 



Pastures, waste places, and woodlands; common. May — Oct. Per. Stem 6 to 

 10 inches high, rooting at the joints several from the same root. Peduncles angular 

 much longer than the leaves. Flowers white, rarely purplish. Legume 4-seeded. 



5. T. procumbens, L. Hop Clover. 



Stems mostly procumbent, spreading, pubescent ; leaflets wedge-ovate, notched at 

 the end, denticulate, the lower pair at a small distance from the other; stipules 

 lance-ovate, ciliate, shorter than the petioles ; peduncles equal to or longer than the 

 leaves; heads axillary, oval. 



Dry fields; naturalized. May — Aug. Annual. Stems 3 to 6 inches loag, many 

 from the same root. Leaves on short petioles. Heads about 2-flowered, small on 

 ^lender peduncles % to V/ 2 inches long. Flowers yellow. Legume 1-seeded. 



6. T. AGRARIUM, L. Golden Clover. Bop Trefoil. 



Stem ascending, with erect branches; leaves nearly sessile; leaflets oblong-ovate 

 ar wedge-shaped, denticulate, all from the same point nearly sessile; stipules na»- 

 row, cohering with the petiole for more than half its length; heads on rather long 

 pedunoltf: 



