142 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
gorum” and Hennings in “Die natiirlichen pflanzenfamilien” retain 
the name Ceriomyces of Corda (’37) for such Ptychogaster species as 
have not yet been certainly connected with a basidiosporic form. But 
in many species there is no doubt of the systematic affinities, since 
the formation of chlamydospores is not so copious as materially to 
modify the normal basidiosporic hymenium or the normal basidio- 
fructification may occur together with the Ptychogaster form; e. g., 
Polyporus biennis Bull. (Boudier, ’88a, and de Seynes ’88), Trametes 
rubescens Fr. (Patouillard, ’82), Polyporus sulfureus Bull, (de Seynes, 
’78, ’84, ’88), and Fistulina hepatica (de Seynes, ’64, ’74, and Brefeld, 
’89). In the species last named, the young fructification consists 
almost entirely of chlamydosporic hyphae; later, tubes may begin 
to form below and the mass of chlamydospores may become pushed 
up to the upper side and spread out in a thick layer. 
Conidia similar to those reported in Stereum hirsutum and Pleurotus 
ostreatus are said to occur in a number of species of this family when 
grown in wet or other unfavorable conditions; e. g., in Polystictus 
versicolor (Patouillard, ’83a, ’83b), and Polystictus zonatus (Eichel- 
baum, ’86). 
Conidia are described by Patouillard (’91a, ’00) in Polyporus 
( Forties) bambusinus from China. The conidiophore is an erect 
hypha, simple or very little branched, arising from the margin of the 
fructification, and bearing chains of from three to ten russet spores, 
the oldest at the end. Patouillard compares the method of formation 
of conidia with that in Poria mollusca (Patouillard, ’90 — not seen by 
writer). In the absence of a more adequate description it seems 
probable that these conidia are chlamydospores, perhaps produced 
in elements of the hymenium, as in Stereum discijorme (see p. 136). 
In species of Fomes and related genera the upper surface of the 
basidio-fructification is sometimes thickly dusted with spores (Pa¬ 
touillard, ’87a, ’87b, ’89a, and Schulzer von Miiggenburg, ’78, ’80, 
’83) which have been interpreted both as conidia and as basidiospores. 
Patouillard found the dorsal surface of Fomes julvus producing both 
normal basidia and others more or less modified into one- or two- 
spored conidiophores. On the pileus of Fomes applanatus are irreg¬ 
ularly branched hyphae bearing terminally or laterally one or more 
spores (Schulzer von Miiggenburg, ’80), and similar sporophores also 
arise from the hymenium. This formation of spores on the dorsal 
surface of a number of species has not yet been sufficiently investi- 
