ORDER 46. LEGUMINOS^. 313 



6 T. stoloniferum Muhl. Glabrous, creeping; branches axillary, ascending 

 short ; Ifts. broadly obcordate, denticulate ; stip. leafy, ovate-lanceolate, acuminate ; 

 Us. loose, umbellate-capitate ; cal. teeth not half the kngth of the cor. ; leg. about 

 2-s3eded. Fields and woods, "W. States. Sts. 6 to 12' long, several together. 

 Branches 3 to 4' high, generally with one head which is 1' diam. Lfts. 6 to 10" 

 by 5 to 9 '. Fls. white, erect, but in fruit all reflexed. May, Jn. 



7 T. arvense L. Hds. cylindrical, very hairy ; cal. teeth setaceous, longer than 

 than ths cor. , Ills, narrow-obovate. CD A low plant in dry, sandy fields, Me. to 

 Fla. Sts. much branched, round, hairy; 6 to 12' high. Lvs. hairy, on short 

 petioles, of 3 narrow Ifts., j to 1' long. Hds. of white or pale red fls., 1' long, 

 very sof'c and downy, the slender, equal calyx teeth being densely fringed with 

 fine silky, reddish hairs, and projecting far beyond the corolla. Jl. Aug. Eur. 



8 T. pratense L. RED CLOVER. Ascending, thinly hirsute; Ifts. spotted, oviil, 

 entire; stip. ovate, cuspidate-acuminate; heads sessile; lower tooth of the cal. 

 longer than tho four others which are equal. If This is the common red clover 

 so extensively cultivated in grass lands, with herds' grass (Phleum pratense) and 

 other grasses, and often alone. Sts. several from the same root, hairy. Lvs. ter- 

 nate, the Ifcs. ovate, lighter colored in the center, entire and nearly smooth. Pis. 

 red, rarely white, sweet-scented. All Summer. Eur. 



9 T. medium. L. ZIG-ZAG CLOVER. St. suberect, branching, flexuous, nearly 

 glabrous; Ifts. not spotted, oblong or elliptical, subentire; stip. lanceolate, acumin- 

 ate; hds. ovoid-globous, pedunculate; cal. teeth setaceous, hairy. If. In meadows, 

 Danvers, Mass. (Oakes). Hds. of fls. larger than in T. pratense. Cor. deep pur- 

 ple. Lvs. of a uniform green. Eur. 



10 T. incarnatum L. St. erect, flexuous ; Ifts. ovate-orbicular, obtuse or 

 obcordate, sessile, crenate villous ; spike dense, oblong, obtuse, pedunculate ; eaL 

 teeth setaceous, villous. CD A fine species from Italy, occasionally cultivated as 

 a border flower, and has been proposed (Dr. Dewey Rep. Herb. PL Mass.) for cul- 

 tivation as a valuable plant for hay. 



30. MEDICA'GO, L. MEDICK. (Gr. jweoW/, lucerne ; from Media, it* 

 native country ?) Calyx 5-cleft; corolla deciduous, vcxilluin free and 

 remote from the keel ; legume variously curved, or spirally coiled or 

 twisted. Herbs or shrubs with pinnately 3-foliate Ivs. 



* Pods smooth.... Nos. 1,2,3. ** Pods spiny Nos. 4, 5, G. 



1 M. lupulina L. NONE-SUCH. Procumbent, pubescent ; Ifts. obovate, obtuse, cu- 

 neate at base; ped. much longer than the leaves, with an oblong spike of small yel- 

 low flowers; pods reniform, 1 -seeded. <T) Fields and waste grounds, Can. to Fla. 

 Sts. 6 to 20' loug. Pods black when rip?, as large as a pin-head. May Oct. 

 Eur. 



2 M. sativa L. LUCERXE. Erect, glabrous; Ifls. oblong-oblanceolate, toothed above, 

 mucronate; stip. lance-linear; ped. longer than the Ivs., ivithan oblong rac. of large 

 violet fls.; pods spirally twisted, reticulated. 2J. Sts. 2 to 3f higk, from a strong, 

 deep root. Highly valued in Europe as a forage plant, with us sparingly 

 cultivated. Jn., Jl. 



3 M. scutellata L. SXAILS. Lfts. elliptical, denticulate, tho lower obovate: 

 stip. ovate, dentate; ped. 1 to 3-flowered, shorter than the leaf; pods, snail-shaped, 

 convex below, flat above, with about 6 concentric-spiral turns. <D Gardens, 

 among flowers, cultivated for its curious pods resembling snail shells. Jl. 

 t E ' ur - 



4 M. denticulata "Wind. Procumbent, glabrous ; Ifts. obovate, denticulate, and 

 often emarginate above ; stip. laciniate, setose ; ped. 1 to 3-flowered, shorter than 

 the leaves ; pods loosely spiral, with 2 or 3 turns, flattened, strongly reticulated, 

 the border echinate with a double row of hooked spines. CD "Waste grounds, hero 

 and there. Sts. 1 to 2f long. Fls. small (yellow in h. s.), purplish. Jn. Eur. 



5 M. intertexta L. HEDGEHOG. Lfts. rhomboidal, toothed; stip. laciniate; 

 ped. about 2-flowered ; leg. oval, 5 or 6-fold, spirally coiled, echinate, the margins 

 bordered with setaceous, reflexed, appressed prickles. Gardens, and occasionally 

 spontaneous. Cultivated like No. 3, for its curious pods. 



