836 



SCROPH ULARIACEAE 



Chaenorrhinum 



50 



Map 1814 



Linaria canadensis (L.) Dumort. 



50 



Map 1815 



Chaenorrhinum minus (U Lanqe 



50 



Map 1816 



Collinsia verna Nutt. 



states, and I have seen large colonies of it in Indiana in sandy soil in 

 pastures. It is difficult to eradicate and, for this reason, should be extermi- 

 nated as soon as it is detected. It is commonly called butter and eggs. 



Nat. of Eu. ; naturalized from Newf ., Que. to B. C, southw. to Fla., Tex., 

 and Calif. ; most common in the ne. U. S. 



2. Linaria canadensis (L.) Dumort. Map 1814. Usually in dry and 

 almost pure sand in fallow fields and on open dunes. Sometimes in fallow 

 fields it grows in such abundance that the landscape is blue. This species 

 should still be sought in Kosciusko, Lagrange, and Steuben Counties. 



N. S. to S. Dak., southw. to Fla. and Tex. ; along the Pacific coast from 

 B. C. to Calif. 



7484. CHAENORRHINUM Reich. 



1. Chaenorrhinum minus (L.) Lange. (Linaria minor (L.) Desf.) 

 Map 1815. This species is reported to have been introduced in 1874 at 

 Camden, New Jersey. Since that time it has spread extensively and is 

 always found in cinder or sand ballast along railroads. I first found it in 

 Vigo County in 1918. I have seen it spread from a few plants along the 

 traction line in Wells County until the railroad bed for miles in flowering 

 season is blue with it. 



Nat. of the Mediterranean region ; now naturalized from N. S. and Que. 

 to Wis. and Iowa, southw. to N. J., Ohio, and 111. 



7503. COLLlNSIA Nutt, 



[Newsom. A revision of the genus Collinsia. Bot. Gaz. 87: 260-301. 

 1929.] 



1. Collinsia verna Nutt. Blue-eyed- mary. Map 1816. This species is 

 well distributed throughout the state but rather local and usually abundant 

 where it is found. Its preferred habitat is moist, rich soil and it is most 



