248 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. fBllll. 



CROTALARIA L. Rattle-box. 

 Crotalaria sagittalis L. (shaped like an arrow-head). 

 Rattle-box. 



Frequent to common. Dry sandy or sterile ground. Jul\ 

 — Sept. 



This plant when present in hay is known to cause seriou- 

 and fatal poisoning- of horses and sometimes of cattle, its mod- 

 of action being similar to that of the western Loco-weeds. 



CYTISUS L. Broom. 

 Cytisus scoparius (L.) Link (broom-like). 

 Scotch Broom. 



Rare. Meriden^ one colony by a roadside (Miss E. J. 

 Leonard). July — Aug. Fugitive from Europe, 

 The dried tops are medicinal and are officinal. 



LUPINUS L. Lupine. 

 Lupinus perennis L. (perennial). 

 Wild Lupine. Blue Bean. Sundial. 



Dry or sandy soil. Found nearly throughout, though 

 ver}' local and uneven in its distribution, but, in general, rare 

 westward and occasional or frequent eastward. May — June. 



TRIFOLIUM L. Clover. Trefoil. 

 Trifolium arvense L. (of cultivated ground). 

 Rabbit-foot or Stone Clover. 



Common. Dry fields and roadsides. June — Sept. 

 Naturalized from Europe. 



Trifolium incarnatum L. (flesh-colored). 

 Crimson or Italiari" Clover. 



Rare. Fields and cultivated ground as an escape from 

 cultivation. June — July. Fugitive from Europe. 



Often grown as a cover-crop. Very brilliant when in full 

 bloom. All the clovers, through the agency of bacterial 

 nodules on their roots, are exceedingly valuable as storers of 

 nitrogen in the soil. 



Trifolium pratense L. (of meadows). 



Red, Common Red, Meadow or Pea-vine Clover. 



