SPORES COLORED. 



Sweden it grows on poplar and oak. The pileus on oak is usually solitary, large, 

 subglobose. On Populus it is imbricate. It is the same fungus, but the difference 

 is due, Mr. Long tells us, to the resistance of the different wood. On both hosts it 

 is a heart rot, but it has no power to attack the sap wood of the oak, hence the fruit 

 is developed from some accidental opening like a knot hole or a broken branch, and 

 from a small base. Poplar is a softer wood, and the fungus destroys the sap wood, 

 and the fruit develops from a broad base. 



In Germany Hartig illustrated Polyporus rheades as Polyporus dryadeus, and 

 his figure is so characteristic, and the account so plain, that the misname is evident. 

 It is probably the basis of Polyporus rheades of German works, though both species 

 undoubtedly grow there. We have found Polyporus rheades' at Berlin. In France 

 it does not seem to have been recognized since Persoon's day, until Patouilferd called 

 it Polyporus tamaricis. Quelet may have had it right. In America we only know 

 the oak form which Berkeley called Polyporus dryophilus. That also is rare, but 

 more frequent in our Southwest. Morgan collected it, and Long recently had quite 

 an article on it under Berkeley's name. Polyporus dryophilus. We do not think 

 it advisable to use this American name when the plant has several names in Europe, 

 and dryophilus is likely to be confused with Polyporus dryadeus, an entirely dif- 

 ferent species. 



SPECIMENS. We have the following collections, and have indicated in parentheses the names 

 they were originally labeled. Washington, W. H. Long (dryophilus); Ohio, G. D. Smith (dryophilus), 

 A. P. Morgan (dryophilus); California, S. B. Parish (corruscans), L. C. C. Krieger (corruscans) ; 

 France, Dr. Pierrhugues, Ernest Olivier, Museum Paris (all as tamaricis) ; Sweden, C. G. Lloyd (cor- 

 ruscans), L. Romell (fulvus), Erik Haglund (vulpinus); Denmark, Jens Lind (vulpinus); Germany, 

 C. G. Lloyd (corruscans). 



Compare corruscans, dryophilus, Friesii, inonotus, tamaricis, vulpinus. 



Fig. 697. 



Polyporus Farlowii. 



POLYPORUS FARLOWII (Fig. 697). Pileus applanate, wavy. 

 Surface strongly hispid, with suberect, brown hairs. Context hard, 

 ferruginous, brown (antique brown), fibrillose. Pores small, round, 

 firm, concolorous. Setae abundant, straight, projecting 30 mic. 

 Spores colored, elliptical, 2^ x 4>-5. 



The type at Kew was collected in Arizona and, according to the 

 label, sent by Farlow to Cooke, who determined it as Polyporus 



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