342 The Botanical Gazette. [September, 
changes could also be brought about by any agency that low- 
ered the vitality of the plant. 
Discussed by Messrs. Bolley and MacMillan. [The paper 
will be published in full in the American Naturalist.] 
29. W. T. SWINGLE: The principal diseases of citrous fruits 
now being studied at Eustis, Fla.—A trouble characterized 
by wilting shows well at a distance, but the microscope gives 
no additional information. It is thought to be due to some 
physiological check to transpiration. Mal di goma is a com- 
mon disease connected in some way with a lack of proper 
respiration at the roots of the tree. ‘Die back” is a disease 
marked by a great variety of symptoms. The name is due 
to the usual dying back of the ends of the branches. Fruit 
and leaves are also affected. It is known to be increased by 
excess of nitrogen in the soil. A local disease of less im- 
portance than the preceding causes corky excrescences upon 
the fruit. 
30. P. HH. Rours: A sclerotium disease of plants. —Espe- 
cially affects tomato, potato, egg-plant and melons, but has 
been found in seventeen species belonging to widely different 
orders. Sclerotia are abundantly formed in the stems neat 
the ground, which give rise to mycelium on culture media, 
but not to spores. The relationship of the fungus has not 
been determined. , d 
31. ELIZABETH G. BRITTON: Ulota Americana Mitten = 
Orthotrichum Americanum Beauv.—Dealt altogether with the 
tangle of synonymy in which these names are involved. 
32. L. H. PAMMEL: Notes on Dyebinctted pyrata. 
33. L. H. PAMMEL: Cyrossin of cucurotts. : E 
34. L. H. PAMMEL: A case < potsoning by the wild pars 
utp, Cicuta maculata. d by 
In the absence of the author these papers were re@ 
title 
Proceedings of the Botanical Club, A. A. A. S+ 
Madison meeting. 
FIRST SESSION, FRIDAY, AUGUST 18, 9 A. M. ok 
The Club was called to order by Vice-president T 
Kellerman, the president, W. P. Wilson, and Sea i 
H. McBride, both being absent. Mr. W. T. SwinS 
