Murrill: Polyporaceae of North America 345 



exsiccati, among which the following will indicate the distribution 

 of the species : Finland, Karsten ; Sweden, Starback ; Saxony, 

 Krieger ; Hungary, Linhart ; Belgium, Westendorp & Wallays ; 

 France, Fautrey ; England, Massce, Plouuright ; Canada, Macoun ; 

 Maine, Blake, Harvey, Richer, Macdougal ; Massachusetts, Fursten ; 

 Washington, Macbride ; Wisconsin, Calkins; Michigan, Minns; 

 Minnesota, Holway ; New York, Shear, Peck; New Jersey, E/iis. 



3. Coltricia parvula (Kl.) 



Polyporus parvulus Kl. Linnaea, 8 : 483. 1833. 



Polyporus connatus Schw. Trans. Am. Phil. Soc. 4: 154. 1834. 



Polystictus parvulus Fr. Nov. Symb. 70. 1851. 



Polyporus focicola E. & C. Jour. Linn. Soc. Bot. 10: 305. 1868. 



This species was described from plants in the Hooker her- 

 barium collected by Dr. Richardson in America. Klotsch had 

 hardly published his description before Schweinitz described the 

 same plant under the name Polyporus connatus. When Fries es- 

 tablished the genus Polystictus, this species was listed first, thus 

 becoming its nomenclatorial type. Later it was renamed P. focicola 

 by Berkeley and Curtis, the reason not being assigned. The plant 

 occurs only in North America and is confined, so far as is known, 

 to the states south of Massachusetts. As with C. perennis, it 

 usually grows on earth mixed with ashes and charcoal from fires 

 built in woods. 



There is no difficulty in distinguishing it from C. perennis ex- 

 cept in middle ground occupied by both species, where they have a 

 tendency to approach each other in varieties. There can be no 

 doubt that the two species are intimately related in origin and the 

 inference is that C. parvula is an offspring of the cosmopolitan 

 species induced by conditions existing at one time in the more 

 southern parts of North America. They are at present, however, 

 so distinct that a plant collected in Georgia may with little hesita- 

 tion be called C. parvula, while one from Canada may with equal 

 certainty be labeled C. perennis. The following collections of C. 

 parvula are at hand: North Carolina, Curtis; South Carolina, 

 Ravenel ; Georgia, Harper; Alabama, Parle; Delaware, Com- 

 mons ; Pennsylvania, Everliart, Jeffries & Haines. In ever}- in- 

 stance the collection was made on soil where fires had been built. 



