Apr., May, 1SS8.] 
ERYSIPHEA AND PER0N0SP0REA. 
35 
Erysipiie graminis, DC. (?)—On Elymus condensatus (Palisade and 
Reno, Nevada). This fungus was found in abundance at the stations 
named and it is somewhat remarkable for its very large perithecia and the 
number of asci. The spores were not sufficiently developed to distinguish 
their number, so that for the present we have referred the species to E. 
graminus, of which it is probably only a form. Our specimens give the 
following characters: 
Amphigenous, but most abundant upon the lower surface; mycelium 
persistent in irregular patches, sometimes covering the entire surface, 
reddish-brown; perithecia very large, 225—250 u in diameter; appendages 
. dark brown, short, crooked, scarcely distinguishable from the mycelium 
with which they are interwoven; asci 27—34, usually about 30, elliptical, 
spores not seen. 
^Uncinula ampelopsidis, Pk.—On cultivated Vitis, Ampelopsis quin - 
quefolia (Missouri and Wisconsin). 
Uncinula circinata, C. & P.—On Acer dasycarpum (Missouri). 
Uncinula flexuosa, Pk.—On PEsculus glabra (Missouri). Our 
specimens of this species were contributed by Rev. C. H. Demetrio, who 
collected them in Perry county. They agree very well with specimens 
collected by Mr. Peck in New York. 
Uncinula macrospora, Pk.—On TJlmus Americana (Missouri). 
Uncinula paryula, C. & P.—On Celtis occidentalis (Missouri). 
Uncinula salicis (DO.) Winter.—On Salix falcata, Salixnigra (Mis¬ 
souri); Populus angulatus, Populus tremidoides (Wisconsin). 
Microsphara Russellii, Clinton.—On Oxalis stncta (Missouri). 
Microsphara 1 diffusa, C. & P.—On Desmodium Canadense (Mis¬ 
souri). 
Microsphara euphorbia:, B. & C.—On Euphorbia corollata (Mis¬ 
souri). 
Microsphara alni (DC.) Winter. — On Viburnum prunifolium , 
Platanus occidental^ (Missouri) ; Celastrus scandens , Lonicera glauca, Cor- 
nus stolonifera (Wisconsin). 
Microsphara Friesii, Lev.—On Syringa vulgaris (Missouri). 
Microsphara quercina (Schw.) Burrill.—On Quercus rubra, Quer- 
cus alba (Missouri). 
Microsphara Ravenellii, Berk.—On Gleditschia triacanthos (Mis¬ 
souri). 
Microsphara symphoricarpi, Ilowe.— On Symphoricarpus vul¬ 
garis (Missouri). 
Piiyllactinia suffulta (Reb.) Sacc.—On Betula nigra , Cornus , sp. 
(Missouri); Celastrus scandens , Corylus Americana (Wisconsin). 
PERONOSPORE^E. 
Peronospora ARTnuRi, Farlow.—On (Enothera biennis (Missouri). 
Peronospora australis, Spez.—On Sicyos angulatus (Missouri). 
