PAPIL10NACEAE. 197 



8. TBIFOLIUM L. Clover. 

 Flowers yellow. 



Bead 12-18 mm. long; stipules linear; leaflets all sessile. 



1. T. aureum. 

 Head 8-12 mm. long, nearly globose; stipules ovate; terminal leaflet 



stalked. 

 Head 20-40-flowered; standard conspicuously striate. 



2. T. proeumbens. 

 Head 3-20-flowered; standard scarcely striate. 3. T. dubium. 



Flowers red, purple, pink or white. 



Head or spike much longer than thick; calyx silky, its teeth plumose. 

 Corolla crimson, equalling or exceeding the calyx-teeth. 



4. t. incamatum. 

 Corolla whitish, shorter than the calyx-teeth. 5. T. drvense: 

 Head globose, oval, or ovoid; calyx nearly glabrous. 



Flowers sessile, or very nearly so ; heads dense, ovoid, oval, or 

 • globose. , .., 6. I,, prepense. . 



Flowers pedicelled; heads umbel-like,, globose. 



Heads 2.5 cm. in diameter or more; peduncles 2-8 cm. long. 



7. T. reflexum. 

 Heads 12-18 mm. in diameter; lower peduncles 5-20 cm. long. 

 Ascending or procumbent ; flowers pink, pinkish or purple. 

 Ascending; calyx much shorter than the pink or 



nearly white corolla. 8. T. hybridum. 



Procumbent ; tufted ; calyx nearly equalling the purple 

 corolla. 9. 'T. Caroliniarmm. 



Creeping; flowers white, or pinkish. 10. T. repens. 



1. Trifolium aureum Poll. Yellow or Hop Clover. M. p. 539. Sandy 



fields and roadsides. Summer. 



2. Trifolium procumbens L. M. p. 540. Sandy fields and roadsides. 



Summer. 



3. Tripolium dubium Sibth. M. p. 540. Fields and waste places. Summer. 



Philadelphia— Chestnut Hill (VP.). Bucks— Perm Valley (Cr.),Tully- 

 town (Le.). Delaware— Tinicum (Fu.). 



Gloucester— Mickleton (He.), Timber Creek (Te.). Cape May—Peer- 

 mont (Br.), Tuckahoe (Ja.), Wildwood (Wn.). Atlantic— Hammonton, 

 May's Landing (C). Ocean— Forked River (Mac). Hunterdon— White* 

 Hill (C). Mercer— Crosswiok's Creek (Br.). 



New Castle— Frequent. 



4. Tripolium incarnatum L. Crimson or Italian Clover. M. p. 540. Cul- 



tivated and persisting. Summer. 



5. Tripolium arvense L. Babbit-foot or St»ne Clover. M. p. 540. Old 



fields. Summer. 



6. Tripolium pratense L. Eed Clover. M. p. 540. Fields and meadows. 



Summer. 



7. Tripolium repleum L. Buffalo Clover. M. p. 541. Meadows. Summer. 



Montgomery— Norristown (Me.). Chester — PhoBnixville, I. Burk (He.). 

 M eroer— Trenton (C). 



8. Tripolium hybridum L. Alsike Clover. M. p. 541. Meadows and 



waste places. Spring to fall. 



9. Tripolium Carolinianum Michx. M. p. 541. Waste ground. Spring 



to fall. 

 Philadelphia— Navy Yard, Mart. (B. C). 



