LYMAN: STUDIES OF HYMENOMYCETES. 
201 
x\garicaceae, but are rare or wanting in the lower families of the 
Hymenomycetes. In the species mentioned in this paper the oidia 
retain their vitality but one or two days, but germinate readily when 
fresh. 
(3) Chlamydospores have been known in a few agarics (especially 
in Nyctalis) and in a considerable number of Polyporaceae where they 
reach their highest development. It is probable also that the conidia 
reported in the hymenium of species of Stereum, Corticium, Hydnum, 
etc., are chlamydospores. Aside from these doubtful cases chlamy¬ 
dospores were not known in the lower families of Hymenomycetes. 
The writer has found chlamydospores to be much more common, 
particularly upon the mycelium, than was previously known, having 
found them in over one quarter of the species cultivated; they occur 
in about equal numbers in the three families studied. Undoubtedly 
further culture study will yield additional proof of their wide distribu¬ 
tion among Hymenomycetes. 
(4) Conidia of a more or less doubtful nature have been reported 
in a number of species belonging to all families of Hymenomycetes, 
but only in Tomentella and Polyporus annosus were regularly occur¬ 
ring and well differentiated conidia known to exist. The writer has 
found conidia or other rather highly specialized secondary methods 
of reproduction in the following species, all of which belong to the 
Thelephoraceae except Lentodium: — 
(a) Corticium subgiganteum, whose imperfect form is known as 
Michenera artocreas. The Miehenera spores are highly specialized 
chlamydospores which form a definite fructification of their own 
with a well defined hymenial layer. 
( b ) Corticium alutaceum, which produces conidia of a simple 
oidium-like nature on the young mycelia, and red-brown spore balls 
or bulbils in great profusion on the mature mycelium. 
(c) Peniophora Candida, a new species, which is the perfect form 
of the well known Aegerita Candida. 
{d) Corticium roseo-pallens, which produced conidia in great 
abundance on all mycelia. The conidia closely resemble the basidio- 
spores and are produced successively until groups of from two to ten 
are formed upon low dome-shaped or capitate elevations on the hyphae. 
(e) Corticium ejjuscatum, which produces conidia of the Oedo- 
cephalum type in all cultures, thus recalling Brefeld’s Heterobasidion 
annosum. The conidia in this species differ from those of Hetero- 
