PAPILIONACEAE. 



[Vol.. II. 



4. Trifolium incarnatum L. Crim- 

 son, Carnation or Italian Clover. 

 (Fig. 2073.) 



Trifolium incarnatum 1,. Sp. PI. 769. 1753. 



Annual, erect, softly pubescent, little 

 branched, 6 / ~3 high. Leaves long-petioled ; 

 stipules broad, membranous, dentate, 4"- 

 12" wide; leaflets all from the same point, 

 very nearly sessile, obovate or obcordate, 

 narrowed or cuneate at the base, denticulate, 

 6 // -ia // long; heads terminal, oblong or 

 ovoid, I'-z^' long; flowers sessile, 4 // -6 // 

 long; calyx hairy; corolla crimson, equalling 

 or exceeding the subulate plumose calyx-lobes. 



In fields, waste places and ballast, southern 

 New York, New Jersey and Pennsylvania. Occa- 

 sionally cultivated for fodder. Introduced from 

 Europe. Called also Napoleons. Summer. 



5. Trifolium arvense L,. Rabbit- foot, 

 Old-field or Stone Clover. (Fig. 2074.) 



Trifolium arvense I*. Sp. PI. 769. 1753. 



Annual, erect, freely branching, silky-pubescent, 

 6 / -i8 / high. Leaves short-petioled; stipules nar- 

 row, 3"-5" long, subulate-tipped, entire or nearly 

 so; leaflets all from the same point, linear or ob- 

 lanceolate, denticulate above, obtuse and often 

 emarginate, narrowed or cuneate at the base, 6"- 

 12" long; heads terminal, peduncled, oblong or 

 cylindric, 6 // -i2 // . long, very dense; calyx very 

 silky; corolla whitish, shorter than the subulate 

 plumose calyx-lobes. 



In fields and waste places, common in most sections 

 throughout our area and in the southern States. Na- 

 turalized from Europe. Native also of northern Asia. 

 Called also Hare's-foot and Pussy Clover. May-Sept. 



6. Trifolium pratense L,. Red, Pur- 

 ple or Meadow Clover. (Fig. 2075.) 

 Tri/olium 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, subu- 

 late-tipped, 6 // -io // long; leaflets short-stalked, 

 all from the same point, oval, oblong, or ob- 

 ovate, narrowed at base, hardly cuneate, obtuse 

 and sometimes emarginate at the apex, often 

 dark -spotted near the middle, finely denticulate, 

 X'- 2/ long; heads globose or somewhat ovoid, 

 sessile (rarely slightly peduncled), about i' long; 

 flowers red (rarely white), sessile, about 6" long, 

 remaining erect in fruit; calyx sparingly hairy, 

 its subulate teeth shorter than the corolla. 



In fields and meadows, common throughout our 

 area and in the southern States. Naturalized from 

 Europe and widely cultivated for fodder. Native 

 also of northern Asia. Leaflets commonly 3, some- 

 times 4-11. English names, Honeysuckle Clover, 

 Knap, Suckles. April-Nov. 



