CRYPTOGAMIA. FUNGI. Boletus 
285 
Bol. medulla-pa'nis. (Jacq.) Woolly white, crustaceous, spreading ; 
pores on the upper surface only; slanting. 
Jacq. Misc. 1.11—( Sowerby 326. E.)— Bolt. 167. the lower Jig'ure — 
Mich. 63. 2. 
Crustaceous, white, spread thin, accommodating itself to the surface of the 
ground, or of the decayed wood on which it grows, from one line to 
several in thickness, soft when young but firm. Pores very small, cylin¬ 
drical, numerous, a little slanting, covering the whole upper surface only. 
Jacquin. (General character resembling crumb of bread, or the inside 
of a loaf. Sowerby. E.) 
(Crumb of Bread Boletus. Bol. medulla-panis. Sowerby. Dicks. Bolt. 
Purt. E.) On decayed wood. Dicks. 18. and decayed branches of trees. 
Relh. n. 1044. I found this in a ploughed field near Bungay, apparently 
growing on the ground, but on examination it arose from a decayed root 
near the surface. Mr. Woodward. 
On the bark of fallen trees in the rookery, Edgbaston. April.* 
Var. 2. Pores very shallow. 
Bolt. 166. 
At first white, thin, and like white glove-leather, full of pores with short 
tubes, or rather resembling deep cells. In time these pores disappear, 
the plant becomes thicker and firmer, the edge lobed and scolloped, the 
surface leathery and smooth, but sometimes cracked. The edge then 
begins to separate from the wood, the colour changes to pale brown, and 
at last to dark red brown; it then becomes hard, dry, and brittle, the 
border is more raised, and the under side appears marked with black 
circles. In this state it remains for a long time, and at last turns black 
and moulders. Bolton, p. 166. 
Bol. proteus. On decayed wood, and branches of trees, in damp situations. 
On the stump of a tree that had been sawn off, Edgbaston. Oct.—Feb. 
Bol. sali'cinus. (Bull.) Tubes white to tawny ; very short: pileus 
semi-circular, whitish, smooth, thin, soft, leathery. 
Bull. 433. 1— (Sow'erby 227. E.) 
Tubes hardly the tenth of an inch long. Pileus not marked with concentric 
circles, always smooth and thin, from two to five inches over. It is 
seldom found in clusters; always on sickly or dead willows. Sometimes 
it sends out fibrous roots between the bark and the wood. Substance 
soft, leathery, not hard like cork : its duration not more than two or three 
months. Bulliard. Sweet smelling, pale brown. Pores oblong, resembling 
a honey comb in structure. Mr. Stackhouse. 
(Willow Boletus. Bol. salicinus. Sowerby. Hook. Purt. Bol. albus. 
Huds. Lightf. Bol. suaveolens. Pers. E.) On willow trees, very common. 
May—Oct. 
Var. 1. Pileus white, downy, scolloped and almost curled at the edge. 
Bolt. 78. 
Tubes white, turning to a dirty red when cut or bruised; nearly one-tenth 
of an inch long. Pores very irregular in shape and size. 
Pileus white, downy, when this is rubbed off, red brown: seven inches 
* (This species, together with Bol. lachrymans , and Bol. liybridus , of Sowerby 289, 
often affect floors in large patches called th© dry rot. E.) 
