PA PILIONA CEAE. 541 



flexed; calyx-teeth linear-subulate, the longer nearly equalling the tube; pod 2-6- 

 seeded. Eastern S. Dak. to Mont, and Cal. May-June. 



9. Trifolium Virginicum Small. PROSTRATE MOUNTAIN CLOVER. (I. F. 

 f. 2078.) Perennial by a long root, diffusely branched at the base. Leaflets 

 linear, narrowly lanceolate or oblanceolate, 1-4 cm. long, obtuse or cuspidate, ser- 

 rate-dentate, glabrous above, more or less silky beneath, conspicuously veined; 

 flowers whitish, crowded, the slender pedicels 2-5 mm. long; standard emarginate- 

 mucronate, striate; calyx silky, the teeth long, subulate. W. Va. June. 



10. Trifolium refl'exum L. BUFFALO CLOVER. (I. F. f. 2079.) Annual or 

 biennial, 2-5 dm. high. Leaves long petioled; stipules ovate-lanceolate, acum- 

 inate, foliaceous, few-toothed or entire, 17-25 mm. long; leaflets short-stalked, 

 oval or obovate, cuneate at the base, obtuse or emarginate at the apex, denticulate, 

 12-25 mm. long; heads dense; flowers 11-13 mm> l n g> on slender pedicels, at 

 length 7-11 mm. long and reflexed; standard red; wings and keel nearly white; 

 calyx-teeth linear, shorter than the corolla; pods 3-6-seeded. In meadows, Ont., 

 N. Y. and Penn. to Iowa, Neb., Fla. and Tex. April-Aug. 



11. Trifolium stoloniferum Muhl. RUNNING BUFFALO CLOVER. (I. F. f. 

 2080.) Branching, 1.5-3 dm. long, forming runners at the base. Leaves long- 

 petioled; stipules ovate-lanceolate, acute, membranous, often 2.5 cm. long; leaflets 

 short-stalked, obovate or obcordate, cuneate at the base, denticulate, 2-3 cm. long; 

 heads nearly 2.5 cm. in diameter; flowers white, purplish-tinged, 8-14 mm. long; 

 pedicels 7-9 mm. long, at length reflexed; calyx-teeth subulate, longer than the 

 tube; pod commonly 2-seeded. Prairies and dry woods, Ohio to Neb., Ky. and 

 Mo. Introduced into $. Dak. May-Aug. 



12. Trifolium hybridum L. ALSIKE OR ALSATIAN CLOVER. (I. F. f. 2081.) 

 Perennial, 3-6 dm. high, glabrous or nearly so. Leaves long-petioled ; stipules 

 ovate-lanceolate, acuminate, membranous, 12-25 mm. long; leaflets short-stalked, 

 obovate, sometimes emarginate but not obcordate, narrowed or cuneate at the base, 

 serrulate, 12-25 mm. long ; heads long-peduncled; flowers pink or nearly white, 

 7-9 mm. long; pedicels 2-5 mm. long, reflexed when old; corolla 3-4 times as 

 long as the calyx; calyx-teeth subulate, about equalling the tube; pod 2-4-seeded. 

 In meadows and waste places, N. S. to Idaho, Ga. and Kans. May-Oct. 



13. Trifolium Carolinianum Michx. CAROLINA CLOVER. (I. F. f. 2082.) 

 Perennial, pubescent, much branched, 7-20 cm. high. Leaves slender-petioled; 

 stipules ovate or ovate-lanceolate, foliaceous, 4-8 mm. long, acute, few-toothed to- 

 ward the apex, or entire; leaflets short-stalked, obovate, emarginate or obcordate, 

 cuneate at the base, denticulate, 4-15 mm. long; peduncles elongated ; flowers 

 purplish, 4-7 mm. long ; standard apiculate; pedicels 25 mm. long, reflexed in 

 fruit; corolla scarcely longer than the calyx; calyx-teeth subulate, longer than the 

 tube; pod about 4-seeded. In waste places about Phila., and in fields and open 

 places, Va. to Fla., Kans. and Tex. March-Get. 



14. Trifolium repens L. WHITE, DUTCH OR HONEYSUCKLE CLOVER. 

 (I. F. f. 2083.) Perennial, glabrous or with a few scattered hairs, the branches 

 often rooting at the nodes, 1-3 dm. long. Leaves long-petioled; stipules ovate- 



lanceolate, membranous, acute, 4-12 mm. long; leaflets short-stalked, obovate, 

 emarginate or obcordate, broadly cuneate at the base, denticulate, 8-20 mm. long; 

 heads long-peduncled; flowers 7-12 mm. long; pedicels 2-5 mm. long, finally re- 

 flexed ; corolla 2-3 times as long as the calyx; calyx-teeth acuminate, somewhat 

 shorter than the tube ; pod about 4-seeded. In fields and waste ground, common 

 throughout our area and in the Southern States. Also in the Northwest. May- 

 Dec. 



13. LOTUS L. 



Herbs or shrubs, with i-3-foliolate, simple or pinnate leaves, and solitary or 

 clustered reddish yellow or white flowers. Calyx-teeth nearly equal. Petals free 

 from the stamen-tube ; standard ovate or orbicular ; wings oblong or obovate ; keel 

 incurved, obtuse or beaked. Stamens diadelphous (I and 9). Ovary sessile, I 

 several-ovuled. Pod linear or oblong, 2-valved, i-several-seeded. [The Greek 

 name of several different plants.] About 120 species, of wide distribution. Be- 

 sides the following, some 40 others occur in the western U. S. 



Corolla yellow ; flowers umbelled. i. L. corniculatus. 



Corolla rose color ; flowers solitary in the axils. 2. L. Americanus. 



