125 
39. Peronospora euphorbiae Fuckel. Fungi rlienani No. 40; Symb. Myc., p. 71. 
Conidia and oospores on leaves and inflorescences at tlie ends of 
brandies of Euphorbiace®. 
On Euphorbia humistrata Engelm. J. M. Ilolzinger, No. 67, July 24, 
1888, Winona, Winona County, Minn. Conidiophores abundant; liypo- 
pbyllous on leaves and inflorescences. 
On Euphorbia cor difolia Ell. E. Bartholomew, No. 435, August 15,1891, 
Rockport, Rooks County, Kans. With immature oospores in stems. 
On Euphorbia hirsuta Engelm. E. Bartholomew, No. 434, August 10, 
1891, Rockport, Rooks County, Kans. With immature oospores in stems. 
On Euphorbia hypericifolia L. W. T. Swingle, No. 4025, September 
21,1891. Low ground in a vineyard. Sterling, Loudoun County, Ya. 
Conidiophores amphigenous on leaves. Oospores sparing; immature in 
leaves. I found only a single plant attacked with the fungus; and of 
this plant but one small branch was affected. The leaves bore also 
JEcidium euphorbice Pers., and were thus doubly parasitized. The 
only other Euphorbia growing near (E. corollata , L.) seemed entirely 
free from Peronospora. 
On Euphorbia serpyllifolia Pers. E. Bartholomew, No. 436, August 8, 
1891, Rockport, Rooks County, Kans. With nearly mature oospores 
in stems. J. M. Holzinger, No. 154, August 22, 1888, Winona, Winona 
County, Minn. Conidiophores very scarce, but leaves and inflorescences 
filled with nearly or quite mature oospores. 
§ doubtful. 
40. Peronospora cubensis Berkeley & Curtis. Berkeley on a collection of fungi 
from Cuba, Part n, including tliose belonging to the families Gasteromycetes, 
Coniomycetes, Hyphomycetes, Physiomycetes. <Jonr. Linn. Soc. Botany, Vol. 
10, 1869, p. 363. 
On leaves of Cucurbitace®. 
On Cucumis anguria. T. L. Brunk, 1888, College Station, Brazos 
County, Tex. J. F. Howe, December 12, 1889, Anona, Hillsboro 
County, Fla. 
On Cucumis sativus. T. L. Brunk, College Station, Brazos County, 
Tex. P. H. Dorsett, Garrett Park, Montgomery County, Md. This 
species did considerable damage this year to a small patch of cucum¬ 
bers on rather low ground near Garrett Park, Md. 
41. Peronospora celtidis Waite. Descript, of two new species of Peronospora. 
<Jour. Mycol., vol. 7, No. 2, p. 105, pi. xvn, figs. 1-16. 
On leaves of Urticace®; tribe Cel tide®. 
On Celtis occidentalis L. M. B. Waite, No. 556, October 7, 1891, 
Washington, D. C. With mature oospores in leaves. M. B. Waite, 
No. 557, October 9, 1891, Washington, D. C. With mature oospores 
in leaves. P. H. Dorsett and W. T. Swingle, No. 4026, October 10, 
1891, mouth of Sassafras River, Still Pond, Kent County, Md. With 
mature oospores in leaves. The specimens included in this number 
were collected on many individuals of a smooth-leaved form of Celtis 
occidentalism which had slender, smooth twigs. The trees grew at the 
16788—No. 2-5 
