6i 



35a. Individual flowers sessile, or on very short pedicels 36. 

 35b. Individual flowers distinctly pedicelled 37. 



36a. Heads oblong, on distinct peduncles; calyx longer than the 

 corolla (flowers nearly white; 1 4 dm. tall) 



Stone Clover, Trifolium arvense. 



36b. Heads nearly globose, almost sessile, closely subtended by 

 the leaves; corolla longer than the calyx (2 8 dm. high; flow- 

 ers red-purple) Red Clover, Trifolium pratense. 



37a. Stems prostrate or creeping; heads long-peduncled, arising from 

 the creeping branches (flower-stalks 1 2 dm. high; flowers 

 white) White Clover, Trifolium repens. 



37b. Some or all of the stems erect; heads arising from the leafy 

 stems (flowers white or pink) 38. 



38a. Plants with long basal runners; flowers 10 13 mm. long 



(23 dm. high) Buffalo Clover, Trifolium stoloniferum. 



38b. Basal runners none; flowers 68 mm. long (38 dm. high) 



Alsike Clover, Trifolium hybridum. 



39a. Prostrate; leaflets broadly ovate; flowers 3 10 in a cluster 



lOa. 

 39b. Erect; leaflets broadest near the middle; flowers numerous 



(5 12 dm. high; flowers yellowish-white, late summer) (Bush 



Clover) 40. 



40a. Leaflets less than twice as long as broad 



Bush Clover, Lespedeza hirta, 



40b. Leaflets more than twice as long as broad 41. 



41a. Leaflets linear, 5 mm. wide or less; heads with obvious 

 peduncles Bush Clover, Lespedeza angustifolia, 



41b. Leaflets narrowly elliptical, the principal ones more than 5 mm. 

 wide; heads sessile or nearly so 



Bush Clover, Lespedeza capitata. 



42a. Leaflets finely toottied 43. 

 42b. Leaflets entire 44. 



43a. Flowers violet or blue (3 6 dm. high; summer) 



Alfalfa, Medieago satha. 

 43b. Flowers yellow (1 2 m. high; summer) 



Yellow Sweet Clover, Melilotus officinalis. 

 43c. Flowers white (1 3 m. high; 'summer) 



White Sweet Clover, Melilotus alba, 



44a. Flowers yellow (5 10 dm. high; summer) 



Wild Indigo, Baptisia tinctoria. 



44b. Flowers white, the leaflets all from the same point (5 10 

 dm. high; summer) Wild Indigo, Baptisia leucantha. 



44c. Flowers blue, purple, or pink (rarely white, and then the 

 terminal leaflet stalked) 45. 



