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40 Polyporeæ, Boletus.<br />

rubri v. lutei tinctura. Tubuli ex auctore fusco-ochracei, sed in<br />

iconibus brunneæ; stipes junior bulbosus; pileus passim verrucosus.<br />

150. Boletus albo-ater Schw. Carol. n. 864, Fr. Epicr. p. 424. - 4789<br />

Pileo pulvinato subtomentoso-velutino, nigro; stipite brevi flocculoso-velato,<br />

atro; poris liberis, minutis, albis.<br />

Hab. in silvis humidis Amer. borealis. - Pileus 7-8 cm. lat.;<br />

stipes 5 cm. long. - * B. floccosus Schw. I. c. Fr. I. c,: verrucoso-floccosus<br />

pulverulentus; pileo pulvinato, cinereo-fusco, margine<br />

revoluto frustulis veli subannulati appendiculato; stipite cinereo-nigro;<br />

poris minutis candidis. In graminosis, cum typo:<br />

151. Boletus duriusculus Schulz. ex Kalchbrenner in Fr. Hymen. 4790<br />

Eur. p. 515, Gill. Champ. Fr. c. icone. - Pileo e globoso hemisphærico,<br />

molli, glabro, udo viscido, ex albo-fuscescente subcastaneo;<br />

stipite basi attenuato, ventricoso, albido, normaliter squamulis<br />

subtilibus umbrinis dense punctato; tubulis liberis, elongatis,<br />

subtilibus, livido-fuscescentibus poris albis, demum concoloribus:<br />

sporis 20 m. long.<br />

Hab. in silvis Slavoniæ sub Populo tremula et in Gallia.<br />

Habitu et sporarum colore ad Favosos accedit et præcipue B. porphyrosporo<br />

videtur affin is, sed ob tubulos liberos porosque minutos<br />

hoc loco collocandus. Statura admodum variabilis; pileus siccitate<br />

subtiliter tessulato-rimosus; caro firma, pure alba, contactu aeris<br />

incarnato-cuprea, sensim in cinereo-violaceum transiens, sed ambitu<br />

et basi alba persistens; sporæ magnæ, oblongæ, umbrinæ. Edulis,<br />

deliciosus.<br />

152. Boletus versipellis Fr. Bolet. p. 13, Epicr. p. 424, Hym. Eur, 4791<br />

p. 515, Berk. Outl. p. 235, Kickx p. 246, A. pileo rufescente: B.<br />

rufus Schaeff. t. 103, Pers. Obs. 2, p. 13, Krombh. t. 32 (ob velum<br />

distinctum), B. aurantius Sowerb. tab. 110, Bol. floccosus<br />

Rostk. tab. 39 (sine velo), B. pileo fuligineo: B. scaber % Pers.<br />

Myc. Eur. 147, Vaill. Par. p. 59, n. 3, Batt. t. 30, f. A. - Pileo<br />

pulvinato, sicco, primo compacto tomentoso, dein squamoso levigatoque,<br />

velo annulari membranaceo, fugaci appendiculato; stipite<br />

solido, sursum attenuato, rugoso-squamoso ; tubulis liberis, planis,<br />

minutis, sordide albis, poris griseis; sporis fusoideo-oblougatis,<br />

pallide ochraceis, 14-20 5-7,5.<br />

Hab. in silvaticis Europæ et Carol. med. Amer. borealis.<br />

Pileus 5-20 cm. latus. Fungus hic et B. scaber vere distincti apparent,<br />

sed ob analogam coloris et staturm variationem ægre limitantur;<br />

color hujus tamen constantius rufus, unde nomen Rol-

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