648 ODONTIA 



pruinose. Spines concolorous, granular, subhemispherical, equal, be- 

 coming subulate, thin, small, very crowded. Flesh concolorous, mem- 

 branaceous, floccose, firm. Spores white, "oblong, subcylindrical, de- 

 pressed on the side, 4-5-6 x 2-2-75 ju,; basidia 10-20 x 3-4-5/u., with 

 2-4-sterigmata, 3-4-5 /x long, accompanied by subulate, sterile basidia, 

 sometimes capped with oxalate, and with numerous smooth, or rough 

 paraphysis-like hyphae forming a tuft at the apex of the spines. 

 Hyphae with walls slightly thickened, firm, with clamp connections; 

 subhymenial hyphae denser, 3 4-5/A in diam." Bourd. & Galz. Fallen 

 oak, beech, and fir branches. July Nov. Rare. 



2196. 0. arguta (Fr.) Quel. (= Hydnum argutum Fr. ; ? Radulum 

 tomentosum Fr. sec. Bourd. & Galz.) Arguta, sharp. 



R. 3-6 cm., white, then yellowish, effused, tomentose, or minutely 

 pubescent, slightly adnate, finally minutely cracked; margin similar, 

 or floccose. Spines white, then ochraceous, 1-2 mm. long, granular, 

 pubescent, then cylindrical, or subulate, sometimes connate at the 

 base, apex penicillate. Flesh concolorous, floccose, firm, thin. Spores 

 white, "oboval, 4-6 x 3-5/A, often 1-guttulate; basidia 10-15-18 x 

 3-4-6/i. Cystidia fusiform, or capitate, crowned, or not, by an oil 

 globule, 7-9 /A in diam. Hyphae thin walled, or slightly thickened, 

 2-4 p. in diam., with clamp connections" Bourd. & Galz. Trunks, 

 stumps, and fallen branches. Sept. Dec. Not uncommon, (v.v.) 



var. alutacea (Fr.) Bourd. & Galz. (= Hydnum alutaceum Fr.) 



Alutacea, tanned leather. 



Differs from the type in its deeper ochraceous tan colour, and the 

 stouter spines. Pines. Aug. Dec. Not uncommon, (v.v.) 



2197. 0. spathulata (Schwein.) Rea. (= Hydnum spathulatum (Schwein.) 

 Fr.) <T7rd0r), a broad blade. 



R. 2-5-5 cm., whitish, becoming yellow, effused, separable, ad- 

 pressedly villose beneath ; margin involute, fimbriate. Spines brick red, 

 or orange, 2-4 mm. long, spathulate, oblique, sometimes flattened, 

 acicular. Flesh concolorous, membranaceous, thin. Spores "white, 

 broadly elliptical, apiculate, 8 x 5/u," Massee. Dead Robinia wood. 

 Jan. Dec. Rare. 



2198. 0. multiformis (B. & Br.) Rea. (= Hydnum multiforme B. & 

 Br.) Multiformis, many shaped. 



R. 5-10 cm., ochrey white, effused, inseparable, becoming cracked 

 when dry; margin indeterminate, thin. Spines pallid, 2-4 mm. long, 

 very acute, becoming fimbriate, crowded. Flesh concolorous, floccose, 

 thin. Spores white, "subglobose, or very broadly pip-shaped, ob- 

 liquely apiculate, 9 x 6-7 /i" Massee. Dead wood. Rare. 



