Genus 12. 



PEA FAMILY. 



355 



4. Trifolium incamatum L. Crimson, 



Carnation, French or Italian Clover. 



Fig. 2477. 



Trifoliiun incamatum L, Sp. PI. 769. 1753 



Annual, erect, softly pubescent, little branched, 

 6'-3° high. Leaves long-petioled; stipules broad, 

 membranous, dentate, 4"-i2" wide ; leaflets all 

 from the same point, very nearly sessile, obovate 

 or obcordate, narrowed or cuneate at the base, 

 denticulate, 6"-i2" long; heads terminal, oblong 

 or ovoid, i'-2i' long; flowers sessile, 4"-6" long; 

 calyx hairy; corolla crimson, equalling or ex- 

 ceeding the subulate plumose calyx-lobes. 



In fields, waste places and ballast, Maine to New 

 York, New Jersey and Virginia. Cultivated for 

 fodder and for nitrogenizing the soil. Introduced 

 from Europe. Called also Napoleons. Summer. 



5. Trifolium arvense L. Rabbit-foot, Old- 

 field or Stone Clover. Fig. 2478. 



Trifolium arvense L. Sp. PI. 769. 1753. 



Annual, erect, freely branching, silky-pubescent, 

 6'-i8' high. Leaves short-petioled; stipules narrow, 

 3"-5" long, subulate-tipped, entire or nearly so ; leaf- 

 lets all from the same point, linear or oblanceolate, 

 denticulate above, obtuse and often emarginate, nar- 

 rowed or cuneate at the base, 6"-i2" long; heads 

 terminal, peduncled, oblong or cylindric, 6"-i2" long, 

 very dense; flowers sessile; calyx very silky; corolla 

 whitish, shorter than the subulate plumose calyx- 

 lobes. 



In fields and waste places. Quebec and Ontario to 

 South Carolina, Florida. Tennessee and Missouri. Na- 

 turalized from Europe. Native also of northern Asia, 

 Hare's-foot or pussy-clover. Calf-clover. Poverty-grass. 

 Bottle-grass. Dogs and cats. Pussies. Pussy-cats. May- 

 Sept. 



6. Trifolium pratense L. Red, Purple or 

 Meadow Clover. Fig. 2479. 



Trifolium pratense L. Sp. PI. 768. 1753. • 



Perennial, more or less pubescent, branching, 

 decumbent or erect, 6'-2° high. Leaves long- 

 petioled; stipules ovate, strongly veined, subulate- 

 tipped, 6"-io" long; leaflets short-stalked, all 

 from the same point, oval, oblong, or obovate, 

 narrowed at base, hardly cuneate, obtuse and 

 sometimes emarginate at the apex, often dark- 

 spotted near the middle, finely denticulate, ¥-2' 

 long; heads globose or somewhat ovoid, sessile 

 (rarely peduncled), about i' long; flowers red 

 (rarely white), sessile, about 6" long, remaining 

 erect ■ in fruit; calyx hairy, its subulate teeth 

 shorter than the corolla. 



In fields and meadows, common throughout our 

 area and in the southern States. Bermuda. Natural- 

 ized from Europe and widely cultivated for fodder. 

 Native also of northern Asia. Leaflets commonly 3. 

 sometimes 4-1 1. M'arl- or cow-grass. Broad-leaved 

 clover. Sugar-plums. Honeysuckle-clover, knap, 

 suckles. April-Nov. 



