Tripolium. XLVII. LEGUMINOS^. 237 



* Heads not invducrate. FloKcrs pedicellate, deflexed u-hen old. 



1. T. REPEXS. Creeping OT White Clover or Trefoil. Shamrock. 



St. creeping, diffuse; Ifts. obcordale, denticulate; stip. narrow, scarious; 

 hds. subumbellate, on verj' long, axillary peduncles ; kg. about 4-seeded ; cal. 

 teeth shorter than the tube. — % In all soils, mountainous, meadow or rocky, 

 throughout ><. Am. Stems several from the same root, extending 6 — 12', root- 

 ing at the joints. Pedimcle angular, much longer than the leaves. Flowers 

 white. May — Sep. — Highly valued for pasturage. 



2. T. REFLEXCM. Buffalo Clover. 



Pubescent ; ascending or procumbent ; Ifts. obovate or oblong-obovate, 

 serrulate, some of them emarginate; stip. leafy, semi-cordate; hds. many-flow- 

 ered; leg. about 4-seeded — H.! Prairies and meadows, Western! and Southern 

 States. "Stem 8—16' high. Leaflets subsessile, 7 — 8" by 4r-5"; petioles 1—2' 

 long. Heads large and handsome. Pedimcles 1 — 3' long. Vexillum rose- 

 red. Apr. — Jn. 



3. T. STOLONIFERCM. Muhl. Running Bit ffolo Clovcr. 



Glabrous, creeping ; branches axillary, ascending, short ; Ifts. broadly 

 obcordate, denticulate ; slip, leafy, ovate-lanceolate, acuminate ; jls. loose, um- 

 bellate-capitate ; kg. about 2-seeded. — % Fields and woods. Western States ! 

 , Stems 6 — 12' long, several together. Branches 3 — 4' high, generally with one 

 'head, which is 1' diam. Leaflets 6 — 10' by 5 — 9". Flowers white, erect, but 

 in fruit all reflexed. May, Jn. 



* ♦ Heads not inrolucrate. Flowers never deflexed nor yellow. 



4. T. ARVEXSE. Hare's-foot Trefoil. 



Hds. cylindrical, verj' hairy ; calyx teeth setaceous, longer than the corol- 

 la; Ifts. narrow-obovate, — (J) Alow plant, abundant in dry, sandj' fields. Stems 

 much branched, round, hairy, 6 — 12' high. Leaves hairy, on short petioles, 

 of 3 narrow leaflets, i — 1' long. Stipules ovate-lanceolate, acute, often red. 

 Heads of white or pale red flowers, spiked, J — li' long, very soft and downy, 

 the slender, equal calyx teeth being densely fringed with fine, silky, reddish 

 hairs, and projecting far beyond the corolla. Jl. Aug. Common in N. Eng. 



5. T. PRATEXSE. Common Red Clover. (Fig. 43, 7.) 



Spikes dense ; sts. ascending ; cors. unequal ; loicer tooth of the calyx lon- 

 ger than the four others, which are equal ; Ifts. oval, entire.— {§) This" is the 

 common red clover, so extensively cultivated 'in grass lands, with herds-grass 

 (^Phlcum pratensc) and other grasses, and olten alone. Stems several from the 

 same root, hairy. Leaves ternate, the leaflets ovate, lighter colored in the cen- 

 tre, entire and nearly smooth. Stipules ovate, mucronate. Flowers red, in 

 short, ovate spikes or heads, sweet-scented. Corollas monopetalous. Flowers 

 all summer. ^ 



6. T. MEDIUM. Zig-Zag Clover. 



St. suberect, branching, 'flexuous, nearly glabrous ; Ifts. oblong or ellipti- 

 cal, subentire ; stip. lanceolate, acuminate; hds. of fis. ovoid-globose, peduncu- 

 late ; cal. t^eth setaceous, hairy. — % In meadows, Danvers, Mass. Oakes. Heads 

 of flowers larger than in T. pratense. Corollas deep purple. Leaves of a imi- 

 fonn green. ^ 



7. T. ixcARXATL-M. Mesh-colored Clover. — S/. erect; flexuous • Z/fc. ovate- 

 orbicular, obtuse or obcordate, sessile, crenate, villous ; spikes dense, oblong, 

 obtuse, leafless ; cal. teeth setaceous, villous. — (i) A fine species from Italy, oc- 

 casionally cultivated as a border flower, and has been proposed (Z>/-. Dewey, 

 Rep. Herb. PI. Mass.) for cultivation as a valuable plant for hay. 



* * * Heads not involucrate. Flowers never defkxed, yellow. 



8. T. PR0cu>rEEXs. Yellow Clovcr or Trefoil. 



St. procumbent or ascending ; Ifts. obovate-cuneate, or obovate-orbicular, 

 obtuse or retuse, denticulate, terminal one petiolulate ; stip. ovate-lanceolate, acu- 

 minate, much shorter than the petioles; hds. small, subglobose, on shortish pe- 

 duncles ; cor. yellow ; sty. 3 or 4 times shorter than the 1-seeded legumes.— <D 

 In drv soils, N. H. ! to Va. Stems raanv from the same root, slender, more or 

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