TniroLiuM. XLVII. LEQUMINOSiE. 237 



♦ Heads not involucrate. Flowers pedicellate, dejkxed when old. 



1. T. RE PENS. Creeping or White Clover or Trefoil. Shamrock. 



St. creeping, diffuse; Z/ifs. obcordate, denticulate; stip. narrow, scarious; 

 hds. subumbeliate, on very long, axillary peduncles ; leg. about 4-seeded ; col. 

 teeth shorter than the tube.— 7]. In all soils, mountainous, meadow or rocky, 

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

 ing afthe joints. Peduncle angular, much longer than the leaves. Flowers 

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



2. T. REFLEXL-M. Bi'ffolo Clover. 



Pubescent; ascending or procumbent; //Z5. obovate or oblong-obovate, 

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

 ered ; leg. about 4-seeded— 7|. '? Prairies and meadows, Western ! and Southern 

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

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

 red. Apr. — Jn. 



3. T. STOLONiFERUM. Muhl. Running Buffalo Clover. 



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

 obcordate, denticulate ; stip. leafy, ovate-lanceolate, acuminate ; Jfts. loose, um- 

 bellate-capitate ; leg. about 2-seeded. — % Fields and woods, Western States I 

 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 involucrate. Mowers never dejiexed nor yellow. 



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



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

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

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

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

 Heads of white or pale red flowers, spiked, J — H' 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. PRATENSE. Comvion Red Clover. (Fig. 43, 7.) 



€pikes dense ; sts. ascending ; cors. unequal ; lower 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 

 {Phleum pratensc) and other grasses, and often alone. Stems several from the 

 same root, ha.iry. 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, subcntire; stip. lanceolate, acuminate; hds. of Jls. ovoid-globose, peduncu- 

 late ; cal. teeth setaceous, hairy. — %. In meadows, Danvers, Mass. Oakes. Heads 

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

 form green. (^ 



7. T. iNCARNATUM. Flesh-colored Clover. — St. erect, flexuous ; Ifts. ovate- 

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

 obtu.se, leafle.ss; cal. teeth setaceous, villous. — (I) A fine species from Italy, oc- 

 casionally cultivated as a border flower, and has been proposed {^Dr. Dewey, 

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



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



8. T. PR0CUMBEN3. Ycl/ow Clovtr or Trefoil. 



St. procumbent or a.scending ; 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.--<I) 

 In drv soils, N. H. ! to Vn. Rtrms manv from lhf» same root, slender, more or 

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