2 Journal of the Mitchell, Society [June 



in cooking. Only a few species are still thought to be harmful (such 

 as L. rufus, L. torminosus, L. fuliginosus, L. pyrogalus, and L. scro- 

 hiculatus) , but none should be eaten without caution unless certainly 

 known to be good. 



To Miss Gertrude Burlingham, who has carefully studied the 

 Lactarias of America, I am greatly indebted for help in determining 

 a considerable number of my most puzzling collections. For the 

 errors, of course, I alone am responsible. All collections are from 

 Chapel Hill unless some other locality is given. Asheville records 

 were obtained from Mr. Beardslee by correspondence. The photo- 

 graphs were all made by me except that of L. suhdulcis, which was 

 taken by Mr. J. ]^. Couch. All are natural size unless otherwise 

 noted. The spores were drawn by me and inked in by Mr. Curtis 

 Vogler, our assistant in botany. The colored plate was painted by 

 my niece, Miss Gladys Coker. 



Important American literature : 



Burlingham. A Study of the Lactarise of the United States. Memoirs Torr. 

 Bot. Club 14: No. 1. 1908. 



Burlingham. Lactarise. N. Am. Flora 9:172. 1910. 

 Peck. N. Y. State Cab. Rep. 23:114. 1872. Bot. Ed. 

 Peck. N. Y. State Museum Rep. 38:111. 1885. 



Key to the Species* 



A. Milk bright colored from the first 1 



1. Milk salmon L. Curtisii (33) 



1. Milk blue L. Indigo (28) 



1. Milk dark red L. subpurpureus (27) 



1. Milk orange or redidish-orange L. deliciosus (25) 



1. Milk saffron-yellow L. ChelidoniuTH (26) 



B. Milk white at first, then turning yellow 



1. Margin of young cap strongly felted-tomentose. .L.scrobiculatus (13) 

 1. Margin of young cap smooth or minutely to- 



mentose 2 



1. Entire cap and stem tomentose, white L. vellereus (3) 



*Figures in parenthesis refer to the species number. 

 Two species of Lactarius have been found both north and south of us, but do not seem to 

 have been recorded from North Carolina. They are L. inrolutus and L. alpinus. The former 

 is distinguished by its small size (2-5 cm.), white or pale ochraceous color, very acrid milk, 

 minutely silky margin and very small spores; the latter by its small size (1.5-4 cm.), tawny- 

 ochraceous color, squamulose cap and white acrid milk. For full descriptions of these see 

 Burlingham, Lactari» of the U. S., Memoirs T. B. C. 14, No. 1: 26 and 79. 1908; or North 

 Am. Flora 9: 177 and 191. 1910. 



