80 BOTANICAL GAZETTE [AUGUST 
The conidia of this new species ’are larger than those of G, 
venetum, measuring 12-15 X 4-6p, in shape fusoid or navicular 
and sometimes curved. 
Unlike G. venetum the fungus is a rapid grower, the colonies 
attaining, under favorable conditions, a diameter of 1™™ in three 
or four days. The colonies have a uniform growth of pure 
white, erect mycelium, resembling at first those of G. fructige- 
num. It is separated from this species, aS well as from G. pho- 
moides, by the navicular character of the conidia and by later 
growth characters. In addition to the characteristic develop- 
ment of mycelium, there are developed abundant bright pink 
acervuli, formed in concentric rings. It is also distinguished in 
its development on bean stems by the entire absence of stroma; 
this character was noted throughout many generations of cul- 
tures. The abundant mycelial growth noted in the agar-agat 
cultures was not so marked on bean stems, but large pink acer- 
vuli are freely developed and the conidia frequently sink to the 
bottom of the tube, where they form a thick, pink sediment. 
The colored, club-shaped bodies have been noted in hanging 
drop water cultures. Growth on bean stems was at first less vig- 
orous than on sterilized raspberry stems, but in laboratory cul- 
ture it gradually adapted itself to the former. Inoculations 
were made on cuttings of raspberry stems transplanted. in the 
greenhouse from the garden, in order to ascertain whether the 
fungus would adapt itself to growth on living stems. Eighteen 
days after the inoculations were made the fungus reappeared 
on the stems, the withered petioles, and along the veins of the 
leaves. As it has since been found on stems obtained from the 
university gardens in connection with G. venetum, it would be 
unsafe to say that the appearance was due to the inoculatio® 
since the mycelium might have been lurking in the tissue before 
the transplantings were made, although the canes were in ap 
apparently healthy condition. 
the fungus seems to be a different species from those that os 
have been described, and presents also growth characters a — 
tinct from the species studied in artificial cultures derived ry 
