Murrill: Boletaceae of North America 



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Boletus squarrosus Pers. Myc. Eur. 2 : 145. pi. 19. 1825. 

 Boletus coniferus Pers. Myc. Eur. 2 : 146. 1825. 

 Boletus strobiliformis Dicks. Crypt. 1 : 17. pi. 3. f. 2. 1785. 

 Boletus stygius Wallr. Fl. Crypt. 4: 608. 1833. 

 Eriocorys strobilacea Quel. Ench. Fung. 163. 1886. 



This common edible species is easily known by its black color 

 and shaggy appearance. Its flesh is white, changing to reddish 

 and finally to black when wounded. It is abundant on shaded 

 banks in woods throughout Europe, Canada, and the United 

 States. 



Doubtful Species 

 Boletus coccineus Fries, Epicr. Myc. 423. 1838. Not Bole- 

 tus coccineus Bull. 1791. This species, of doubtful affinities 

 and doubtful locality, is based upon a brief description and a 

 figure (Plum. Fil. Amer. pi. 16 7. f. A.A.). It is placed by 

 Saccardo in the genus Strobilomyces. 



4. Pulveroboletus gen. nov. 



Hymenophore annual, terrestrial, centrally stipitate ; surface of 

 pileus and stipe clothed with a conspicuous sulphur-yellow, 

 powdery tomentum, which may be the remains of a universal 

 veil : context white, fleshy ; tubes adnate, yellowish, covered 

 with a large veil: spores oblong-ellipsoid, ochraceous-brown : 

 stipe solid, annulate, not reticulate. 



Type species, Boletus Ravenelii B. & C. 



1. Pulveroboletus Ravenelii (B. & C.) 



Boletus Ravenelii B. & C. Ann. Mag. Nat. Hist. II. 12 : 429. 1853. 



This beautiful and interesting species was first described from 

 the collections of Ravenel in South Carolina, and has since 

 been collected in many of the eastern states from New England 

 to the Gulf of Mexico. It differs from most other higher fungi 

 in preferring deep shade, being often found in dense thickets of 

 Kalmia and Rhododendron. The conspicuous veil and the yel- 

 low powder which covers the entire sporophore will readily 

 distinguish this species. 



5. Boletellus gen. nov. 



Hymenophore annual, epixylous, centrally stipitate; surface 

 floccose-verrucose, yellowish: context light-colored, fleshy; tubes 



