41 
The ascospores infect the unfolding shoots of the Cowberry in the 
spring, about the end of Mayor beginning of June. At the point of 
contact with the host plant an ascospore puts out one, occasionally two, 
slender germ tubes, which never penetrate through a stoma but bore 
between two adjacent epidermal cells or directly through one of these 
into the host plant. 
The germ tubes which are produced by the ascospores seek the fibro- 
vascular bundles of the host plant, and continue their growth from these 
bundles as a centre, thus reversing the direction of the fungus so that 
it grows from the center of the plant toward the periphery. Then ap. 
pears a most peculiar phenomenon; the fungus exerts an injurious in¬ 
fluence on the surrounding tissues of the host plant, killing them first 
and then using them as food for its further development. 
Finally the hyphge penetrate between the elements of the outer rind, 
which has been killed by the fungus, and there develop into a large- 
celled, pseudo-parencliymatic, stroma-like cushion, from which the 
gonidia chains grow into the air through the ruptured cuticle. 
The other three species are dealt with much more briefly, since their 
« 
general characteristics are much the same as the first one. In the 
chapters devoted to them the author deals mainly with the features 
which distinguish them as distinct species and wherein they differ from 
the first. 
He suggests that the second species which attacks the small cran¬ 
berry, Vaccinium oxy coccus, may be the same one that attacks the 
American cranberry, V. macrocarpon, and if this is true says that the 
matter of routing the disease is an easy one, viz, collecting and burning 
all the diseased berries in the fall. To one acquainted with the manner 
and places of growth of American cranberry vines this method might 
present some practical difficulties. 
In conclusion there are a few notes on other forms. 
He found the gonidia and a sclerotium like condition of Acrosporium 
cerusi , Rabh., which occurs on the cherry. On Primus padus he found 
a fungus having the three forms, gonidia, sclerotia, and apothecia, and 
analogous forms were observed on S'orbus acuparia. He is also of the 
opinion that the well-known Monilia fructigena is only the gonidia! form 
of a similar Sclerotium. He has found Sclerotia in the fruit of Alnus 
and Bet-ula , and in the latter case has seen a cup fruit grow from the 
Sclerotia in the spring. 
The work is a valuable contribution to our knowledge of the life his¬ 
tories of the Sclerotinice , and the author’s name is sufficient authority 
for its perfect reliability. The illustrations are particularly fine, and it 
is a deplorable fact that very few American works can point to similar 
ones.— Effie A. Southworth. 
