BOLETUS. l8l 



stem, short, plane ; pores round, white, becoming fuscous when Boletus 

 bruised. 



Very much allied to B. fe Ileus, but easily distinguished by its somewhat un- 

 changeable flesh, and mild watery taste. 



In woodland pastures. Rare. 



Name — aluta, tanned leather. From the colour. Fr. Hym. Eur. p. 516. 

 Berk. Out. p. 235. C. Hbk. n. 730. 



K. Cariosi. Stem externally never reticulated, &c. 



39. B. cyanescens Bull— Pileus 5-12.5 cent. (2-5 in.) broad, 

 somewhat fuscous or tan, convexo-expanded, adpressedly tomen- 

 tose, floccoso-scaly, opaque ; flesh rigid, white, soon becoming 

 deep blue when broke?i. Stem stuffed with a spongy pith, at 

 length cavernous, ventricose, villoso-pruinose, of the same colour 

 as the pileus, constricted at the apex where it is even, white. 

 Tubes free, white, at length light yellow; pores minute, round, 

 when young scarcely 2 mm. (1 lin.) long. 



Very remarkable ; when compressed pouring out azure-blue juice. 



In mixed woods. Rare. Aug.-Sept. 



Spores at first milk-white, at length pale lemon-yellow. Fr. ; spindle-shaped, 

 14x8 mk. IV.G.S. Becoming instantly intense blue when broken. The 

 down on the pileus is very matted and floccosely scaly. Name— cyaneus, 

 deep blue. From the flesh becoming deep blue. Bull. t. 369. Fr. Hym. 

 Eur. p. 517. Syst. Myc. i. p. 395. Sv. at I. Sv. t. 80. Berk. Out. p. 236. 

 C. Hbk. n. 732. S. Mycol. Scot. n. 689. Letell. t. 654. Krombh. t. 35. / 

 7-9. Barla t. 37. Rostk. t. 44. Harz. t. 71. Saund. & Sm. t. 47 (dark). 



40. B. castaneus Bull— Pileus 5-7.5 cent. (2-3 in.) broad, 

 cui7iamo7i, opaque, convexo-expanded or depressed, firm, even, 

 velvety j flesh white, unchangeable. Stem 5-7.5 cent. (2-3 in.) 

 long, stuffed then hollow, attenuated from the somewhat bulbous 

 base, even, velvety, opaque, ci7inamon. Tubes free, curt, white ; 

 pores minute, round. 



Smaller than B. cyanescens, not juicy. Pileus at first embracing the base 

 of the stem, whence the stem when young is obsoletely somewhat marginato- 

 bulbous, not constricted at the apex as in B. cyanescens. 



In woods. Rare. 



Name — castanea, chestnut. Chestnut-coloured. Bull. t. 328. Fr. Hym. 

 Fur. p. 517. Syst. Myc. i. /. 392. Berk. Out. p. 236. C. Hbk. n. 733. 

 Barla t. 32./. 11-15. Krombh. t. 4./ 28-30. Hussey, ii. t. 17. 



Subg. I. Gyrodon. 

 No British species. 



