SEBACINA 737 



Sebacina Tu]. (= Thelephora (Ehrb.) Fr. p.p.). 



(Sebacina, greasy.) 



Receptacle coriaceous, gelatinous, membranaceous, waxy, floccose, or 

 pulverulent, resupinate, effused, adnate, or crustaceous, and with the 

 habit of a Corticium. Hymenium smooth, or papillose. Basidia longi- 

 tudinally, cruciately divided, close together, or scattered, sometimes 

 intermixed with the conidiophores. Spores white, cylindrical, oval, 

 oblong, reniform or globose, smooth; producing sporidiola, or bunches 

 of conidia on germination. Growing on the ground, or on wood. 



Subgenus Eusebacina Rea. 



(eS, typical; Sebacina, the genus Sebacina.) 



2516. S. incrustans (Pers.) Tul. (= Thekphora sebacea (Pers.) Fr.; 

 Thekphora cristata (Pers.) Fr.) Berk. Outl. Brit. Fung. t. 17, 

 fig. 6, as Thelephora sebacea. Incrustans, covering with a coat. 



R. 5-10 cm. high, whitish, effused, incrusting, very variable in form, 

 tubercular, or resembling stalactites, apices somewhat subulate, or 

 fringed. Hymenium whitish, even, flocculoso-pruinose. Flesh whitish 

 waxy, then coriaceous, firm, loose. Spores white, oblong, curved or 

 flattened on the one side, 11-13 x 4-5 p, often guttulate; "basidia 

 ovoid, 15-20 x 12-15jLt. Hyphae firm, 2-5-3/u, in diam." Bourd. & 

 Galz. Incrusting grass, twigs, stems, mosses, leaves, etc. Feb. Nov. 

 Common, (v.v.) 



2517. S. calcea (Pers.) Bres. (= ? Corticium calceum (Pers.) Fr.) Bres. 

 Fung. Trid. t. 175. Calcea, limy. 



R. 3-10 cm., shining white, or chalk white becoming somewhat buff 

 or greyish, effused, closely adnate, crustaceous, slightly pulverulent; 

 margin mealy, thinner. Hymenium concolorous, smooth, or papillose 

 and somewhat tuberculose, at length cracked. Flesh whitish, sub- 

 gelatinous, floccose. Spores white, "reniform, curved, 15-16 x 7-8 /A; 

 basidia at first globose, then more elongated and longitudinally, 

 cruciately septate, 18-25 x 12-16^, with sterigmata 30 x 3-4/i" 

 Wakef. "Paraphyses branched at the apex into very fine branches, 

 loaded with minute granules. Basal hyphae 2/x, in diam., the wall 

 gelatinously modified" Burt. Bark and dead wood. Sept. April. 

 Uncommon, (v.v.) 



2518. S. fugacissima Bourd. & Galz. Fugacissima, very fleeting. 

 R. -5-2 cm., greyish, effused in a very thin, mucous, hyaline film, 



which disappears completely on drying, or leaves only a slightly 

 glistening trace barely visible under a lens. Spores hyaline, cylindrical, 

 curved, 4-5 x 2-5-4 /z; basidia longitudinally septate, 6-7 x 5-6 /LI. 

 Basal hyphae, thin walled, 2-3/t in diam. Very rotten wood. Feb. 

 Rare. 



B.B.B. 47 



