Murrill: Polyporaceae of North America 1*7 



This species has apparently been found by only two botanists. 

 The type plants were collected July 10, 1894, by C. S. Crandall, 

 no. jo, upon charred trunks of Abies on the crest of the continental 

 divide, Colorado, at an altitude of 3,000 meters. Specimens were 

 later collected by Bethel, no. 280, at Climax, Colorado, at a height 

 of 3,390 meters, on the ends of decaying coniferous logs project- 

 ing from the snow. 



4. Aurantiporus gen. nov. 



Type : Polyporns Pilotae Schw. 



Hymenophore large, annual, epixylous, sessile, dimidiate ; sur- 

 face anoderm, sodden, bibulous, reddish-orange, soon fading ; con- 

 text reddish-yellow, fleshy-tough to woody, juicy when fresh, 

 rigid when dry, conspicuously zonate ; tubes small, slender, thin- 

 walled, brilliant orange when fresh, becoming dark, resinous and 

 fragile on drying ; spores smooth, hyaline. 



Aurantiporus Pilotae (Schw.) 

 Polyporus Pilotae Schw. Trans. Am. Phil. Soc. 4: 156. 1834. 

 Polvporas Pini-canadensis Schw. Trans. Am. Phil. Soc. 4: 157. 



1834. 

 Polyporus hypococcinus Berk. Lond. Jour. Bot. 6 : 319. 1847. 



This brilliantly colored species was first described from speci- 

 mens collected on Pilot mountain, North Carolina, growing on a 

 chestnut log. According to Morgan these specimens had lost 

 their brilliancy when Schweinitz found them, which partly ac- 

 counts for Berkeley's redescription of the species under the name 

 of P. hypococcinus when Lea's younger plants were sent him from 

 Ohio. Original specimens examined at Kew and at Philadelphia 

 are excellently preserved and show the two species to be synony- 

 mous. No specimens are to be found, however, of P. Pini-cana- 

 densis, which Berkeley & Curtis in their commentary on Schwein- 

 itz's Synopsis say is certainly the same as P. hypococcinus. This 

 species was described from plants found in a pine swamp near 

 Mauch Chunk, Pennsylvania, growing on a trunk of Pinus cana- 

 densis, according to Schweinitz. It is possible that he was mis- 

 taken in the host. Specimens collected by Nuttall on dead de- 

 ciduous logs in West Virginia are also resupinate and agree well 

 with the description of P. Pini-canadensis. P. Pilotae and P. hypo- 

 coccinus are only known to occur on very much decayed wood of 

 oak and chestnut. 



