Boletus POLYPORACE/E 319 



SUBGENUS 3. BOLETINUS. Tram a descending somewhat between the 

 tubes, the hymenophore is therefore not smooth after their 

 removal ; in this respect Boletinus resembles Strobilomyces . 

 The relationship between Boletus and Boletinus is similar to 

 that between Polyporus and Tra metes. 1515a 



SUBGENUS i. EUBOLETUS. 

 (From being typical examples of the genus; Gr. en, well.) 



EUCHRO/E. 

 a. Viscipelles. 



1456. B. luteus L. (from the yellow tubes ; lutens, yellow) a b c. 



P. gibbous, pulvinate to convex, deep vinous brown, covered 

 with dark purplish gluten which is at first continuous over the 

 tubes, forming a V. St. equal, dull light yellowish. A. large, 

 membranous, white to dark purplish. T. yellow or brownish- 

 yellow. Po. minute. 



Edible. Woods, pine ; common. July-Nov. 5 X 2 X in. 



1457. B. elegans Schum. (from its elegance) a b c. 



P. convex, dark rich yellow, shaded orange. St. sulphur to 

 orange above A., darker below. A. broad, fugacious, sulphur. 

 T. decurrent, sulphur to bright yellow. Po. minute. 



Woods, chiefly larch, oak, pine ; common. June-Oct. 4| x 2| x in. 



1458. B. flavus With, (from the yellow pileus ; flams, light yellow) 



a b c. 



P. convex or pulvinate, full luminous yellow, covered when 

 young with claret-brown gluten. St. equal, reticulate, yellow 

 above, brownish-yellow below. A. membranous, fugacious, 

 white to yellow-white. T. adnate, bright yellow or brownish- 

 yellow. Po. larger than in 1456 and 1457. 



Woods, mixed ; common. Aug. -Nov. 4^ x 3^ X in. 



1459. B. flavidus Fr. (from the yellowish pileus ; flavidus, light 



yellowish) a b c. 



P. convex, obtuse, brownish-yellow or pale yellowish-buff. 

 St. equal, whitish-yellow or straw-colour, granular above the 

 brownish viscid A. T. adnate to slightly decurrent, yellow, 

 somewhat sulphur. Po. angular. Flesh pale ochre. 



Woods, pine. July-Oct. z\ x 2j x J in. 



1460. B. collinitus Fr. (from the gluten-besmeared pileus ; collino, to 



besmear) a b c. 

 P. pulvinate to expanded and slightly depressed, brownish-buff, 



sometimes pale, covered with rich vinous-brown gluten. 



St. attenuate downwards, rooting, white, becoming brownish. 



T. adnate to subdecurrent, pallid to yellow. Flesh white. 

 Solitary. Edible. Woods, fir. Nov. 3f x 2^ x ij in. When young 



resembles 1456. 



