MICHIGAN WEEDS. 



365 



( f 



Fig. 123 (111). 



Alsike Clover. Trifolium hybridum L. 

 Biennial, 'perennial (?). smooth, stems weak, 

 30-60 cm. long: leaves with long petioles, 

 leaflets three: obovate, narrowed at the base, 

 serrulate; heads of flowers without an involucre, 

 peduncle long, corolla pinkish white. Never 

 a weed but placed here for the purpose of 

 comparison. 



Fig. 124 (112). 



Crimson Clover. Scarlet Clover. 'Italian 

 Clover. Trifolium incarnatum L. Annual, 

 erect, soft, pubescent, 15-90 cm. high: leaves 

 long petioled, leaflets nearly sessile, obovate, 

 narrowed at the base, denticulate; heads ter- 

 minal becoming spikes, 2-5 cm. long; flowers 

 sessile, calyx hairy, corolla crimson, very showy. 



Dangerous to feed horses, as the hairy calyces 

 form balls in the stomach and clog the intestines 

 Not a weed but included here for comparison. 

 Introduced from Europe. 



