ODONTIA 649 



2199. 0. mollusca (Fr.) Rea. (= Hydnum molluscum Fr.) 



Mollusca, soft. 



R. 5-10 cm., whitish, effused, easily separable, dry. Spines reddish, 

 short, slender. Flesh white, membranaceous, thin. Wood. Rare. 



2200. 0. sulphurea (Schwein.) Rea. (= Hydnum sulphureum Schwein.) 



Sulphurea, sulphur yellow. 



R. 10cm., sulphur yellow, effused, adnate; margin paler, byssoid, 

 sterile. Spines concolorous, subulate, minute, few. Flesh membrana- 

 ceous, thin. Dead birch wood. Rare. 



***Waxy crustaceous, very adnate. 



2201. 0. crastosa (Pers.) Quel. (= Grandinia crustosa (Pers.) Fr.) 



Crustosa, having a crust. 



R. 5-15 cm., whitish cream colour, then yellowish, or tan colour, 

 effused, adnate, finally cracked and minutely areolate ; margin white, 

 distinct, narrow, pruinose, or minutely pubescent. Spines concolorous, 

 granular, short, pointed, or obtuse, scattered, or somewhat crowded. 

 Flesh concolorous, crustaceous, thin. Spores white, "oblong, subcylin- 

 drical, depressed on the side, 4-5-6-8 x 2-4: fj,; basidia 12-21-30 x 

 3-4-6jU,, accompanied by numerous fusiform, or subulate cystidioles, 

 3-4-6/A in diam., sometimes branched, slightly projecting. Hyphae 

 thin walled, 1-5-4 /A in diam., with rather rare clamp connections" 

 Bourd. & G-alz. Fallen branches. Jan. Dec. Uncommon, (v.v.) 



2202. 0. cristulata Fr. (= Peniophora setigera Bres. sec. Bourd. & 

 Maire.) Cristulata, crested. 



R. 514 cm., pale, or rosy flesh colour, widely effused, adnate, 

 mealy; margin white, narrowly byssoid, pubescent, or mealy. Spines 

 concolorous, or reddish brown, short, crowded, or confluent and crested ; 

 apex penicillate, pointed. Flesh white, somewhat waxy, then crusta- 

 ceous, thin. Spores white, "cylindrical, slightly depressed on the side, 

 8-10 x 3-5-4 //,; basidia 25-32 x 4-5-7 /x, contents granular. Cystidia 

 fasciculate, cylindrical, 4-5/u, in diam., 1-2-septate, with, or without 

 clamp connections. Hyphae thin walled, 3 6/A in diam., with clamp 

 connections " Bourd. & Galz. Birch branches. Feb. Rare. 



2203. 0. mellea (B. & Br.) Rea. (= Hydnum melleum B. & Br.) 



Mellea, honey colour. 



R. 5-10 cm., honey colour, effused, pulverulent', margin minutely 

 byssoid. Spines concolorous, 1-2 mm. long, acute, sometimes divided 

 at the apex, pulverulent downwards, naked at the middle. Flesh 

 crustaceous, thin. Spores white, "cylindrical, 7-10 x 2-5/i" Massee. 

 Fallen rails. Rare. 



