110 
tate, somewhat flexuous, producing abundantly sooty-black irregular pyriform or sub-quadrate 
muri-form spores, which vary in size from 20—7o mk. long, by 1o—20 mk. wide.” 
Stytospores: Phoma destructiva (fig. 7.)—Perithecia carbonaceous, minute, globose, sphe- 
rical, clustered ; spores, hyaline, oval cylindrical, binucleate, 5—6 mk. long, by 1.5—x mk. wide. 
Another disease which sometimes but much more rarely attacks tomatos 
while still growing, is due to a Dactylium very closely allied to, if not identical 
with D. roseum, B., from which it differs in producing its spores in threes, and in 
growing parasitically upon a living plant. This disease seems more especially to 
affect a variety of tomato known to gardeners as the Trophy, and commences 
upon the base of fruit, near the attachment of the stalk. 
Dactylium lycopersici (fig. 8).—Forming a dense floccose whitish-pink mass. Spores hyaline, 
with a tinge of pink, oval or ovato-pyritorm, uniseptate, often apiculate, produced in threes upon 
the terminal extremities of erect sparsely septate hyaline hyphe. 
My best thanks are due to Mr. S. Castle, of The Vineyard, West Lynn, for 
pointing out these different diseases, and supplying me with abundant specimens 
and much valuable information which has been inserted in this paper.—From the 
Gardeners’ Chronicle, Nov. 12, 1881, p. 620. 
ON THE RELATIONSHIP OF ASCIDIUM BERBERIDIS 
(Pers.) TO PUCCINIA GRAMINIS (Pers.). 
By Mr. Cartes B. Prowricut, M.R.C.S. 
THERE are not many more important questions in the whole range of vegetable 
physiology than those connected with the entwickelungsgesschichte of the fungus 
which causes the mildew in wheat. The magnitude of the issues at stake have 
been forcibly brought before us, who reside in the large corn-growing country of 
Norfolk, during the last few weeks, where acres of wheat which, within a 
month or three weeks of the harvest, gave promise of an abundant yield, were in 
less than a fortnight blighted to such an extent that in some instances consider- 
ably less than half a crop only was produced. 
In the month of May of the present year (1881), I performed some experiments 
with the view of convincing myself one way or the other upon the connection said 
to exist between Mecidium berberidis and Puccinia graminis; but owing to my 
non-acquaintance with the proper method of performing them, they resulted in 
failure. I then wrote to my esteemed friend, M. Max. Cornu, who immediately, 
in the most kind manner, gave me full and explicit directions as to the proper 
mode of procedure. On the 18th June I commenced a second series of experi- 
ments, which have been continuously carried on until the end of September, in 
which 176 plants of wheat have been employed. I propose laying before you a 
detailed account of each experiment, in order that you may be enabled to form 
* This is probably the species of Macrosporium, found, and I believe published, by Ravenel, 
from the Southern States of America, under the name of M. tomati. 
a 
