140 



Transactions British Mycological Society. 



X 850 



Corticiiim coroniferum. 



clavate, wavy, 3-5-4/x wide, when mature elongated and pro- 

 jecting from the hymenium, apex truncate, sterigmata 4-8, 



in British specimens usually 4, rather 

 long. Spores narrowly elliptical, with 

 oblique basal apiculus, variable in 

 size, 4-5-6 (-8) X 2-3 (-5)/x. Basal 

 hyphae frequently septate, with 

 clamp-connections, 4-5 /x in diameter. 

 On bark and rotten wood, and often 

 spreading on to the surrounding soil, 

 etc., Kew, Jan. 1911 (E.M.W.) ; 

 Cusworth, near Doncaster, Sept. 

 1914 (E.M.W.) ; Weybridge, Dec. 

 1917 (A. A. P.). 



In this species the walls of all the 

 elements are very thin and delicate, 

 so that it is difficult to observe the 

 structure from dried specimens. The 

 gloeoc^'stidia are sometimes lacking, 

 hence the species might be looked for 

 amongst white Corticia of the section 

 Urnigera. The peculiar basidium. which is found in C. coroni- 

 ferum is characteristic of the section Urnigera (see Bourdot 

 in Bull. Soc. Myc. Fr. 1911, p. 243), and in fact this species 

 forms a connecting link with that group. The shape of the 

 mature basidium is most easily described as like that of an 

 extended Hydra. 



Corticitmi lactescens Berk. 



Poiiophora puhcra (Fr.) Sacc.,g/e6w/osaBres. 

 (type form), longispora (Pat.) von 

 Hoehn. 



Peniophora accedens Bourd. et Galz., in 

 Bull. Soc. Myc. Fr. XXVIII, 1912, 

 p. 386. 

 Very thin, effused, greyish-white, becom- 

 ing cracked on drying ; hymenium glistening 

 with the cystidia when viewed with a lens. 

 Cystidia of similar type to those of P. glebu- 

 losa, smooth and thick-walled except at the 

 apex, but here the apex is swollen into a 

 globose head, about io-ii/ia in diameter. 

 Hyphae . indistinct, i-5-2/x in diameter. 

 Basidia 4-spored, ^/jl wide. Spores ellipti- 

 cal, with lateral apiculus, 4-5 (-5) x 3/a. 



X 850 

 Peniophora accedens. 



