Trifoijum. XLVIl. LEGUMINOSiE. 



* Heads not invalucmle. ll&wers pedicellate, defiexed wfien old. 



1. T. REPENS. Creeping or Wliite Clover or Trefoil. Shavirock. 



St. creeping, diffuse; If/s. obcordate, denticulate; slip, narrow, scarious* 

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

 ieelh shorter than the tube.— Ij. In all soils, mountainous, meadow or rocky, 

 throughout N. Am. Stems several Irom the same root, extending G— 12', root- 

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

 white. May — Sep. — Highly valued for pastm-age. 



2. T. REFLEXUM. Buffalo Clover. 



Pubescent ; ascending or 'procumbent ; If is. obovate or oblong-obovate, 

 serrulate, some of them emarginate; slip, leafy, serai-cordate; hds. manj^-flow- 

 ered; leg. about 4-seeded — %1 Prairies and nieadows. Western! and Southern 

 States. Steni 8 — IG' high. Leaflets sxibsessile, 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. Riaining Buffalo Clover. 



Glabrous, creeping; branches axillaiy, ascending, short; Ifls. broadly 

 obcordate, denticulate; slip, leafy, ovate-lanceolate, acuminate; Jls. loo.se, um- 

 bellate-capitate ; kg. about 2-seeded.— 1)- Fields and woods, Western States 1 

 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 

 m liuit all reflexed. May, Jn. 



* * Heads not involucrate. Flowers never defiexed nor yellow. 



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



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

 la ; Ifts. narrow-obovate, — Q A low plant, abundant in dry, sandy fields. Stems 

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

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

 Heads of white or pale red flowers, spilced, J — \h' long, very soft and downy, 

 the slender, eqiral 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. Co-mmon Red Clover. (Fig. 43, 7.) 



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

 ger than the four others, which are equal; Ifls. oval, entire.— (g) Thi.s" is the 

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

 (Pkleum prate nse) and other grasses, and often alone. Stems several from the 

 same raot, 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. ^ 



G. T. -MEDIUM. Zig-Zag Clover. 



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

 cal, subentire; slip, lanceolate, acuminate; hds. of fs. ovoid-globose, peduncu- 

 late ; cat. 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. Flcsh-colored Clotcr. — ;§/. erect, flexuous ; Z/?5. ovate- 

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

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

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

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



* * * Heads not involucrate. Flowers never defiexed, ycllov). 



8. T. PROcuMBENs. YcUow Clovcr or Trefoil. 



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

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

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

 duncles; cor. yellow ; «/;/. 3 or 4 limes shorter than the 1-seeded legumes. — 

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

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