1 68 POLVPOREI. 



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



white. 



Subg. I. Gyrodon Opatowski (yvpos, a circle ; oSov?, a tooth). Pores 

 sinuous or gyroso-plicate ; tubes very short, scarcely 2 mm. (1 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. I. Euchroi. Tubes bright-coloured, Sec. 



A. Viscipelles. Pileus covered over with a 7'iscoiis pellicle, &*c. 



* Genuini, forming a continuous series. 



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

 yellowish, smeared with fuscous separating gluten, gibbous then 

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

 XYz in.) and more thick, equal, firm, whitish, rough with dots and 

 light yellowish above the large, membranaceous, white-fuscous 

 rmg. 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 mk. A'. 

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

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

 663. Schceff. t. 114. Ft. Dan. t. 1135. Rostk. Sturm. 4. /. 1. AY. Ft. Bor. 

 t. 377. Barla t. 31./ 1-3. Harz. t. 6. Gonn. & Rab. vii. t. 6./. 2 and t. 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. ail. Sv. t. 76. Berk. Out. p. 229. C. Hbk. n. 701. S. 



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



f. no. Grev. t. 183. Ventur. t. 47. /. 1, 2. Bull. t. 332. Krombh. t. 34. 



/. I-JO. 



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



