152 FUNGI. [Boletus. 



lated only at the very top, but sometimes half-way down, minutely 

 pulverulento-squamulose, of the same colour with the pileus, \yith a few- 

 minute dark flecks, and just where the tubes end a few minute red 

 spots ; mottled with blue when cut. Taste like that of a growing 

 walnut. The growth of the tubes is sometimes partially checked, so 

 that while on one side they are 1 inch thick, on the opposite side they 

 are not above :f or ^. I have found the same plant more than a foot 

 broad, more decidedly tomentose and of a delicate mouse-grey, and the 

 sides of the pileus remarkably compressed, so as to be parallel with the 

 stem ; the flesh not changing uniformly to blue,* but becoming beauti- 

 fully mottled and the stem bright-red near the tubes. 



Still another form, with the tubes at first bright yellow, the stem ex- 

 tremely thick and not in the least reticulated, but rough like that of ^. 

 scaber, and neither flesh nor tubes changeable, occurred in May at 

 King's Cliffe, Norths. Sporules pale olivaceous ochre. Taste and 

 smell like that of ^^. Georgii ; the yellow expressed juice distinctly 

 ^cid. 



11. B. luridus, SchcefF. (poisonous Boletus); pileus pulvinate 

 siibtomentose olive, tubes nearly free round yellow, their orifices 

 crimson-red, stem thick generally more or less marked or reti- 

 culated with crimson-red. Schi^ff. t. 107. Tratt. (Est. Schio. 

 t. 9. n. 17. Ft. Syst. Myc. v. 1. p. 391. Grev. Fl. Ed. p, 

 404. Sc. Cnjpt. Fl. t. 121.— J5. rubeolarius, Bull. ^.490./. 

 1. With. V. 4. p. 276. Soiv. t. 250. Purt. 3Iidl. Fl. v. 2 ^ 

 3. n. 985. — B. bovmus, Bolt. t. 85 — B. perniciosus, Roques, 

 Hist, des Champ, t. 7./. 1—3 — B. marmoreus, t. 6. 



Woods. Summer and Autumn. Common. — Pileus 2 — 6 inches 

 broad, convex, expanded, minutely tomentose, olive, brick-red, pinkish, 

 cream-coloured, or ferruginous brown ; flesh more or less yellow, 

 changing to blue. Tubes free, yellow, or greenish, their orifices of a 

 beautiful red or bright orange, quite simple, round. Sporules oliva- 

 ceous-ochre. Stem very variable in length, bulbous, tomentose, some- 

 times quite smooth, red with ferruginous or the brightest yellow shades, 

 solid, generally more or less marked or reticulated with crimson-red. 

 Very deleterious. M. Roques mentions a case which came under his 

 own observation of its bad effects, which happily yielded to opium. 

 The var. /3. erythropus, Pers. has been found in Scotland by Klotzsch. 

 It differs in its more slender, punctato-squamulose and not reticulate 

 stem. 



12. B. castdneus, Bull. {Chestnut Boletus) ; pileus subvillous 

 chestnut inclining to brick-red, tubes half-free white, then bright 

 yellow, stem even mealy. Bull. t. 328. Pers. Syn. p. 509. 

 Fr. Syst. Myc. v.l.p. 392. 



Woods. Oct. Not common. King's Cliffe, Norths. ; Rev. M. J. 



Berkeley Pileus 3 inches broad, depressed when old but broadly 



pulvinate in the centre, subtomentose, the down raised up into little 

 flat scales, beautiful dark-rufous tan; Jiesh thick mottled, stained 



• The blue colour certainly arises from a change which takes place in the 

 juice. When squeezed out, it is at first quite pellucid, but almost instantly 

 changes from yellow to a bright blue, and at length to brown, leaving behind 

 a rich brown staiu upon white paper. 



