Pol^porus.] 



FUNGI. 135 



of the hymenium be torn off, a new stratum of pores is rapidly deve- 

 loped. This common but handsome species attains sometimes an enor- 

 mous size. An instance is recorded in Hooker's Fl. Scot, of its measur- 

 ing 7 feet 5 inches in circumference and weighing 3-4 lbs. avoirdupois, 

 and it was only three weeks in attaining these vast dimensions. In 

 vaults and hollow trees it sometimes assumes the form of a Clavaria^ 

 but in this case seldom produces a pileus. Boletus rangiferinus, Bolt, 

 t. 138 is a good representation of this state, and an intermediate one is 

 fiaured by Sowerby. There is also a good figure given by John Martyn, 

 Phil. Tr. V. 43. ;a 263. t. 2./ 1 . It is eaten in some districts of France, 

 but is very tough and indigestible. See Kcques, Hist, des Champ, p. 56 . 



3. P. heterocUtns, Bolt, (j/elloiu villous Fohjporvs) ; sessile, 

 pileus thin villous irregularly lobed yellow changing to orauge 

 brown, pores irregular pale yellow changing to brown. JFV. 

 Syst. 3Iyc. v. 1 . p. 344. — Boletus hettrocUiiis, Bolt. t. 1 64. Pint, 

 r. 3. n. 1487. Sow.t2>^l, 



On the ground, growing from stumps partly covered with soil, rare. 

 Fixby Hall near Darlington. Bolton. King's Houghton. Purton. — 

 '* Pilc'fs 2:V inches broad. It shoots out several flat pieces from a 

 hard and coriaceous root, which is white within, lying on the surface 

 of the earth in a horizontal direction. Pores very variable in size and 

 form." Pnrt. MSS. Sowerby's plant, growing on willow, seems some- 

 what different; but in the absence of all description, and there being 

 no specimen remaining in his collection, it is best to take his own 

 authority for its identity. I have omitted entirely Bol. pellucirlu^y 

 "With., which Fries conceives near to P. siihsgnamosus, because it 

 appears highly probable, from his observation that it is subject to be 

 infested by the yellow Beticularia of BuUiard {^Sepeclonium wycO' 

 philum) that it \s some species o( Boletus, perhaps B. scaher which 

 sometimes has the tubes very short and the epidernns cracked, as in 

 the figure of Schceffer referred to, so as to resemble scales. 



** Pores miniite siihrofund. 



\ Stem cerdral or lateral. 



4. P. hrumdlis, Pers. {printer Poh/porns) ; pileus of a tough 

 elastic flesjjy substance subuin})ilicatc villous fuliginous at 

 length pale, pores subaugnlar white, stem j)ale. Fr. Si/st 3Iijc, 

 V. 1 . p. 348. Rostk. I. c. f. 5. — Bol. hrumalis, Pers. Si, ft. p. 517. 

 —Elvella pileus, Schoff. t. 281.— i?. lacteus, Patsch, Pl.f. 42. 



On Beech. Autumn and Winter, reviving in the Spring, t^cofand. 

 Klotzsch in Hook. Jfer/t.— Pihus 1 — I inches broad, nearly plane, de- 

 |n-essed in the centre, dingy, clothed with minute scales, at length fawn- 

 coloured and nearly smooth. I'orcs very slightly angiflar, w liitc, the 

 dissepiments rather thick. Stem ',' — 2 inches high, 2— 4 lines thick, 

 central, velvety, hirsute or sciunmulosc. 



5. P. Icptoccphahis, Jacq. {small round Poh/j.orvs) ; pilous 

 Ijctweeu fleshy and coriaceous thin smooth fawn-coloured, pores 

 very minute subrotund white, stem sliort pale. Pr. Syst. 3Ji,c. 

 V. 1. ;;. 310.— 7V. lipt<((jfhalits, Jacq. Misc. 1. p. 14:.'. /. 12. 

 Dicks, fisr. 3. p.2\. With. v. 4. ;». 273. 



On decayed slicks. JJic'.son.—'' Pdtus 1 inch broad, tawi ybr-y, 



