PAPERS ON BOTANY 227 
THE GENUS 
The genus Gliocladium was described by Corda, the type 
species being G. penicillioides. According to Saccardo the 
genus may be described as having the sterile hyphae creeping, 
the fertile hyphae growing erect, simple, septate, and forming 
upon branching a brush-like structure upon which the conidia 
are borne. The conidia are at first catenulate but later are 
enveloped by a mucilaginous substance into a little head. It is 
only in the presence of this sticky coat on the spores of Gliocla- 
dium that Gliocladium and Penicillium differ essentially. 
There are fourteen species given in the “Sylloge Fungorum” 
most of which occur on decaying fungi or other dead organic 
matter. None of them seems to be of any economic importance 
except G. agaricinum Corda and Mass., which arrests growth 
and breaks the pilei of mushrooms. 
THE SPECIES 
The fungus was submitted to Dr. Chas. Thom, who said, “I 
examined the culture and find a form which I have studied sev- 
eral times during the last ten years. Thus far I have called it 
‘Gliocladium viride Matr.’ The lot to which this belongs needs 
someone’s time and attention, but this one runs close enough 
to the form named above to forbid separate nomenclature, un- 
less for reasons based on a larger volume of study than I have 
thus far been able to give it.’ An article by Matruchot’ gives 
fully the development of the species. There seem to be some 
differences between the fungus as described by him and the 
material at hand. Further study may justify describing it as 
a new species. Neither the variation in spore measurement, 
nor difference in the shape of the spores alone would be suf- 
ficient grounds for separating it. But G. viride is described as 
having at first catenulate spores. Examination of a large num- 
ber of conidiophores of my species with spores varying in num- 
ber from 1 to 3 or 4, has never shown any to be so. They seem 
rather to form on the ends of a hyphal thread, a new spore de- 
veloping at the same point and pushing the old one aside. 
(Fig. 6). 
Another difference seems to be in the development of the 
mycelium. G. viride forms a branch just below a septa which 
grows up parallel to the main axis, this in turn branching in 
