l68 POLYPOREI. 



Boletus. at the first white, then often light yellowish ; pores minute, round. Spores 

 white. 



Subg. I. GYRODON Opatowski (yvpos, a circle ; oSov's, a tooth). Pores 

 sinuous or gyroso-plicate ; tubes very short, scarcely 2 mm. (i lin.) long, 

 slightly adnate to the hymenophore. ' 



Subg. II. BOLETINUS Kalchbr. Enum. p. 286. (From Boletus to denote 

 its relation to that genus.) " Hymenophore not even as in the true Boleti, but 

 with projecting points which descend like a trama between the tubes." Stem 

 annulate. 



Ser. /. EUCHROI. Tubes bright-coloured, &c. 



A. Viscipelles. Pileus covered over ivith a viscous pellicle, &*c. 



* Genuini, forming a continuous series. 



1. B. luteus Linn. Pileus about 5-10 cent. (2-4 in.) broad, 

 yellowish, smeared with fuscous separati?ig gluten, gibbous then 

 pulvinate ; flesh white. Stem about 5 cent. (2 in.) long, 12 mm. 

 (Yz in.) and more thick, equal, firm, whitish, rotigh with dots and 

 light yellowish above the large, membranaceous, white-fuscous 

 ring. Tubes adnate ; pores minute, simple, yellow. 



The pileus becomes paler and virgate-spotted when the gluten separates. 

 In pine woods. Common. July-Nov. 



Edible and highly esteemed like other Boleti. The flesh is very tender. 

 The tubes should be scraped away from all the species before being cooked. 

 Spores spindle-shaped, yellowish-brown, 8x3 mk. W.G.S.; 6-8x3 m k. K. 

 Name luteus, yellow. Linn. Fr. Hym. Eur. p. 497. Syst. Myc. i. p. 386. 

 Sv. dtl. Sv. t. 22. Berk. Out. p. 229. C. Hbk. n. 700. S. Mycol. Scot. n. 

 663. Schceff. t. 114. Fl. Dan. t. 1135. Rostk. Sturm. 4. t. i. Kl. Fl. Bor. 

 t. 377. Barla t. 31. /. 1-3. Harz. t. 6. Gonn. 6 Rab. vii. t. 6. /. 2 and /. 4. 

 Krombh. t. 33. 



2. B. elegans Schum. Pileus golden or- inclining to ferru- 

 ginous, convexo-plane, viscous; flesh light yellowish. Stem 

 firm, unequal, golden then rufescent, dotted above the white then 

 light yellowish, fugacious ring. Tubes decurrent ; pores minute, 

 simple, golden-sulphur-yellow. 



Gills at length darker. 



In woods, especially larch. Common. June-Oct. 



About the size of B. luteus. Name elegans, elegant. Schum. Fr. Hym. 

 Eur. p. 497. Sv. dtl. Sv. t. 76. Berk. Out. p. 229. C. Hbk. n. 701. S. 

 Mycol. Scot. n. 664. Hussey ii. /. 12. Gonn. & Rab. t. 5. f. 2. Price 

 f. no. Grev. t. 183. Ventur. t. 47. f. i, 2. Bull. t. 332. Krombh. t. 34. 

 /. i-io. 



3. B. flavus With. Pileus light yellow with fuscous separating 



