119 
On leaves of Composite. Conidiopliores liypophyllous on cauline 
leaves. 
On Erigeron Philadelpliicum , L. (*?). B. T. Galloway, September 25, 
1891, Garrett Park, Montgomery Comity, Md. 
On Erigeron (sp. ?). E. W. D. Holway, July 20,1884, Decorah, Win¬ 
neshiek County, Iowa. 
On Silphium perfoliatum, L. M. B. Waite, No. 265, September 8,1888, 
Oregon, Ogle County, Ill. S. M. Tracy, September 1, 1888, Plattville, 
Grant County, Wis. Witli mature oospores on cauline leaves. 
On Ambrosia artemisicefolia , L. W. T. Swingle, No. 4019, September 
20,1891, Garrett Park, Montgomery County, Md. 
On Ambrosia trifida , L. E. A. Soutliworth, May 1, 1891, College 
Station, Prince George’s County, Md. B. T. Galloway, May 13, 1888, 
Virginia. C. G. Hart, May 14, 1884, Normal, McLean County, Ill. P. 
H. Dorset!, May 16, 1891, Benning’s Station, Md. M. B. Waite, No. 
266, May 19,1888, ITrbana, Champaign County, Ill. M. B. Waite, No. 541, 
June 1, 1888, Oregon, Ogle County, Ill. C. A. Hart, July 18, 1883, La 
Grange, Lewis County, Mo. T. A. Williams, No. 256, August 1, 1889, 
Wabash County, Nebr. 
On Helianthus grosse-serratus , Martens. M. B. Waite, No. 546, May 
28, 1888, Oregon, Ogle County, Ill. Conidiopliores forming a dense 
white coating. 
On Helianthus (sp. !). C. A. Hart, May, 1884, Normal, McLean 
County, Ill. Conidiopliores attacking only the basal portion and there 
forming a dense white coating. M. B. Waite (Herb. Div. Veg. Path., No. 
318) September 4, 1891, Oregon, Ogle County, Ill. Conidiophores on 
cauline leaves in rather scattered spots. F. L. Scribner, July 17, 1887, 
Lanier Heights, Washington, D. C. Conidiophores forming a very dense 
white coating on the basal portion of the diseased leaves. 
On Bidens connata , Muhl. E. M. Fisher, No. 188, September, 1890, 
ITrmeyville, Johnson County, Ind. 
On Bidens frondosa , L. E. M. Fisher, No. 58, July 20, 1890, Urmey- 
ville, Johnson County, Ind. E. M. Fisher, No. 59, August, 1890, Urmey- 
ville, Johnson County, Ind. 
On Erechthites hieracifolia , Baf. M. B. Waite, No. 122, August 11, 
1885, Oregon, Ogle County, Ill. 
17. Plasmopara gonolobi (Lagorheim) Swingle. 
1891. Peronospora gonolobi, Lagerlieim. Observations on new species of fungi from 
North and South America. <Hour. of Mycol., Vol. vii, p. 49. 
On leaves of Asclepiadaceae. 
On Gonolobus suberosus , B. Br. W. T. Swingle, No. 4001, Oct. 10,1893, 
Still Pond, Kent County, Md. Conidiophores only, liypophyllous. Prof. 
W. G. Farlow lias kindly compared my specimens with a part of those 
from which Prof. Lagerlieim described the sfiecies and pronounces them 
identical. The species has the typical branching of Plasmopara. The 
conidia germinate readily in water producing zoospores which have two 
cilia. 
