[Vor. 3 
214 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Hypochnus wmbrinus (Fr.) is noteworthy among the dark 
species by its hyphae not being nodose-septate, i. e., not hav- 
ing clamp connections. Its tuberculate or aculeate spores and 
compact hymenium afford additional distinctive characters. 
Thelephora umbrina Alb. & Schw. is regarded now by 
European botanists as a Coniophora, of which I have a speci- 
men from Bresadola; what Fries understood by T. wmbrina 
is exaetly shown by an authentie specimen in Kew Herba- 
rium. This specimen is a true Hypochnus in fine condition, 
dark-colored, with compact hymenium separated from the 
substratum by a thick layer of loosely arranged, suberect, 
thick-walled, colored hyphae, which do not have clamp con- 
nections. Т. biennis, as used by Fries in 1821, is a deserip- 
tion of the illustration in Bulliard’s ‘Herb. de la France’ 
2:986. pl. 436. f. 2, Fries stated that he had seen no speci- 
mens at that time. In ‘Hymenomycetes Europaei,’ published 
in 1874, he changed the description of T. biennis materially 
to adapt it to living specimens which he had seen. The re- 
supinate specimen of this later period in Herb. Fries is not 
distinct from Hypochnus umbrinus. Authentic specimens of 
H. tristis and Hypochnopsis fuscata received from Karsten, 
and of Hypochnus sitnensis from Bresadola are the same 
species as already pointed out by Bresadola;' still earlier, 
Romell stated in letters his belief that H. tristis is a synonym 
of H. wmbrinus. My studies lead to the same conclusion. 
The type specimen of Thelephora arachnoidea Berk. & 
Broome agrees closely with the Friesian specimen of H. wm- 
brinus. Bresadola? has deseribed hyphae of T. arachnoidea 
s **punetato-seabrae vel tunica granoso-aculeolata primitus 
induetae, usque ad ди crassae,’’ but in my preparation of the 
type of T. arachnoidea the walls of the hyphae are even and 
not more than 4%» in diameter.’ 
Ann, Myc. 1:107. 1903. 
108. 
?[bid., p. 
"In bg same connection оа е. Thelephora EN Ell. & Ev. 
а synon of T. arachnoidea, and he n follo SE s by von Hóhnel. 
My preparations of the t type of T. ло wie n N. 
that this species is not a basidiomyeete, CH that its ы ате nodose-septate. 
