684 FABACEAE 
(INDIAN-CLOVER.) —W aste-places, fields, and roadsides, Coastal Plain, Fla. to Tex., 
and S northward to E Canada; also Pacifie States, and rarely in the in- 
terio at. of Eurasia. 
11. TRIFOLIUM [Tourn.] L. Annual or perennial herbs. Leaflets 3, 
digitate or pinnate, or rarely 5 or 7. Calyx-lobes nearly equal, or the 2 u 
longer than the 3 low e e times partly united. Corolla bina 
colored or white: standard elliptic or obovate, or elongate and clawed: other 
petals with long claws, the ounded aur at 
e 
base of the blade.—About 275 A natives mainly of the north temperate 
zone.—CLOVERS. "TREFOILS.— Various species, particularly T. pratense and 
T. hybridum, are grown for iin 
Corolla white or colored but not yellow 
Racemes peduncled: claw of the ndari shorter than the 2e except in T. 
appaceum, which has the corolla shorter than the calyx 
ur o not 2-lippe 
rolla hare than the caly 
Sta ndard with the blade "Ioa than the claw: 
mature racemes ellipsoid: corolla white. I. ARVENSIA. 
Mieres with the blade shorter than the claw: 
racemes globular: corolla pink. II. LAPPACEA. 
Corolla. longer than the calyx. 
Calyx-lobes plumose: raceme cylindri III. INCARNATA. 
Calyx lohee not plumose: raceme glo bul 
Plant annual or biennial: calyx- e ed 
times donor than the tube. IV. REFLEXA. 
Plant perennial: calyx lobes and tube about 
qual in length. V. REPENTIA. 
e 
Calyx 2-lipped. VI. CAROLINIANA. 
ra sessile: claw of the standard longer than the 
VII. PRATENSIA. 
Corolla ne VIII. AGRARIA 
I. ARVENSIA 
Plant with grayish-pubescent foliage and silky-plumose 
racemes. 1. T. arvense. 
II. LAPPACEA 
Plant with glabrous foliage and sparingly hairy racemes. 2. T. lappaceum. 
III. INCARNA 
Plant erect: flowers ascending or nie P ndum in 
cylindrie somewhat plumose racem 3. T. incarnatum. 
IV. REF 
Plant with several to many radially M stems at 
maturity: flowers i erred strongly reflexed, forming a 
depressed flat-topped h 4. T.reftezum. 
REPENTI 
Calyx-lobes subulate, not dilated, the sinuses pubescent. 
Upper calyx-lobes slightly united : blades of the keel- 
petals longer than the claws. 
pper AR a er nee blades of the keel-petals 
r th 
5. T. stoloniferum. 
shor 6. T. hybridum. 
Calyx-lohes lanceolate dc pé with dilated bases, the 
es glabro 
Sanct not Dro nineniy veined, serrulate; terminal 
leaflet longer- sore page E the lateral. T. T. repens. 
Leaflets prominently veined, spinulose-serrate: terminal 
leaflet not longerstetked than the lateral. 8. T. saxicola. 
VI. CAROLINIANA 
Slender depressed herb with slender peduncled small capi- 
tate racemes: corolla white, pink, or purplish; standard 
abruptly pointed. 9. T. carolinianum. 
VII. PRA 
Coarse erect herb with sessile large risus racemes: corolla 
red or magenta, or rarely white; standard obtuse or 
nearly truncate at apex. 10. T. pratense. 
