CORTICIUM 677 



2296. C. atrovirens Fr. Trans. Brit. Myc. Soc. in, t. 16. 



Ater, black; virens, green. 



R. 2-6 cm., Hue, greenish blue, or dark greenish, irregularly effused, 

 floccoso-fibrillose, or arachnoid, seated on a concolorous, profuse, 

 mycelium. Hymenium paler, or tinged with yellow, submembrana- 

 ceous. Flesh concolorous, arachnoid, thin. Spores greenish, or bluish, 

 subglobose, 3-5-4/x, in diam. ; basidia clavate, 18-20 x 5-6 fj,, with 

 2-4-sterigmata, 3-4|u, long. Hyphae greenish blue, 2-4/u, in diam., 

 thin walled, without clamp connections. Bark and fallen branches. 

 Sept. Dec. Uncommon, (v.v.) 



5. Receptacle dry, subpelliculose, crustaceous, or pruinose, adnate. 

 Basidia truncate at the apex, with 4-6, or 6-8-sterigmata. 



2297. C. niveo-cremeum von Hoehn. & Litsch. Trans. Brit. Myc. 

 Soc. vi, text-figs, p. 71. 



Niveus, snow white ; cremeum, cream colour. 

 R. 25 cm., greyish white to cream colour, effused, indeterminate, 

 closely adnate, dry. Hymenium concolorous, waxy, slightly granular 

 in places, very minutely and abundantly cracked when dry, giving a 

 characteristic appearance under a lens, the cracks being bridged by 

 numerous, fine, byssoid strands of the subiculum. Flesh concolorous, 

 byssoid, very thin. Spores white, cylindric-ellipsoid, or slightly in- 

 curved and boat-shaped, 6-7 x 3-4 /A, occasional spores up to 10 x 5/z; 

 basidia 12-18(-30) x 4-5-7 /x, truncate above, with 4-6-8 straight 

 sterigmata, 4-5jU, long. Basal hyphae thin walled, 4-5/A in diam., in- 

 distinct, branched, septate, with clamp connections. Rotten wood. 

 Nov. Jan. Uncommon, (v.v.) 



6. Receptacle dry, chalky, or pubescent, adnate. Trama 

 distinct. Basidia with 2-4-sterigmata. 



2298. C. Sambuci (Pers.) Fr. (= Corticium serum (Pers.) Quel.; 

 Peniophora Chrysanthemi Plowr. sec. Wakef. in litt.) Grev. 

 Scot. Crypt. Fl. t. 242, as Thelephora Sambuci Pers. 



Sambuci, of elder. 



R. 218 cm., pure snow white, or chalk white, becoming yellowish 

 when dried, effused, subinnate, incrusting, chalky, collapsing and more 

 or less powdery when dry. Hymenium concolorous, granular, pruinose. 

 Flesh white, crustaceous, very thin. Spores white, broadly elliptical, 

 appearing almost globose under a low magnification, with a small 

 lateral apiculus, 3-6 x 3-5 p, often 1-guttulate; basidia 15-22 x 

 3'5-5-5jii, accompanied by fusoid sterile basidia (cystidioles) often 

 expanded into a knob at the apex, and incrusted with tiny crystals. 

 Hyphae thin walled, 2-3-5(-4-5)|u, in diam., loosely interwoven, with 

 clamp connections, and sometimes with scattered minute crystals 

 adhering to the outer walls. Stumps, rotten branches, logs and old 

 herbaceous stems. Jan. Dec. Common, (v.v.) 



