290 
CRYPTOGAMIA. FUNGI. Boletus 
(Sowerby asserts, that when the pores are apparent only beneath, if the 
fungus belaid with the pileus downwards, they will soon be produced on 
the upper surface. E.) 
This is an extremely beautiful plant, and admirably depicted by M. Bul- 
liard. The fine sulphur yellow of the pores flies off’ in a few hours after 
the plant is gathered. The aurora colour appears on the yellow parts of 
the pileus wherever the surface is abraded. Some specimens grow 
double, one over another, from the same root. 
(Sulphur-coloured Boletus. Polyporus sulphureus. Fries. Grev. Bol. 
sulphureus. Sowerby. Hook. Purt. Bol. ramosus. Pers. E.) In the cleft 
of a large cherry tree at Edgbaston, where a similar one was gathered 
the preceding year, so that it appears to be an annual, 28th June. Wool- 
hope, Herefordshire, and in a yew tree near Kidderminster. Mr. Stack- 
house.* 
Var. 2. Pileus pale yellow or buff, thick, tough, elastic, tiled. 
Bolt. 7-5— Battar. 34. B. — Schoeff. 132— ib. 131, Us young pulpy stale. 
Bol. coriaceus. Huds. Bol. ienax. Light. In hollows on the trunks of 
trees. May —Sept. 
Var. 3. Pileus white. 
Tubes yellow, not one-twentieth of an inch in length. Pores yellow, irre¬ 
gular. 
Pileus white, covered with a very fine kind of woollen knap : marked with 
three or four concentric depressed lines or furrows ; four or five inches 
over ; thin and without tubes at the edge. 
On an oak post at Soho, near Birmingham, about a foot from the ground. 
Aug. 
(Bol. iMBRiCA f TUS. Tubes numerous, short, yellowish, or pale fulvous ; 
pileus roundish, convex, yellowish brown, lobed, sinuous ; flesh 
rather thick, white. 
Hook. FI. Loud.—Sowerby 86— Bull. 366. 
Tubes united to and closely connected with the substance of the pileus. 
Pileus undulated, smooth, sometimes cinnamon-coloured, with the margin 
paler; black in decay. 
Flesh firm by age, and. coriaceous; in its young state the texture of the 
plant so soft as to be pierced by blades of grass. The imbricated mass 
frequently from one to two feet diameter. Hooker and Sowerby. 
Fulvous Imbricated Boletus. On decaying trunks of trees in 
Kensington Gardens, where it has been observed for several successive 
years. 
* (Dr. Robert Scott, of Dublin, on drying a specimen of this fungus, found evolved 
on the surface a quantity of needle-like crystals, which proved to be nearly pure oxalic 
acid. His analysis of the products of this plant is curious, and may be read in Lin. 
Trans, v. viii. Dr. Greville also mentions an instance of an enormous mass of this 
plant being completely encrusted with a salt, which Dr. Thomson ascertained to be the 
bin-oxalate of potass. Mr. Purton remarks that the tubular part has a remarkably 
pungent acid taste, approaching more to a mineral than a vegetable acid, and is even 
retained by dried specimens twelve months gathered. Sowerby states that on the Con¬ 
tinent this species is not unfrequently reduced to powder and employed as tinder. 
E.) 
