44 
IOWA ACADEMY OF SCIENCE 
Index to Species and Varieties of Erysiphaceae. 
Recognized species are in italics; synonyms are in Roman. 
Erysiphe 24 
cichoracearum 26 
cummunis 24 
galeopsidis . . . • 28 
graminis 29 
horidula 26 
lamprocarpa 26 
linkii 26 
martii 25. 
montagueii . 26 
polygoni 24 
spadacea 26 
tauraica 29 
tortilis 25 
Microsphaera 30 
abbreviata 30 
alni ... . 30 
alni extensa 32 
alni vaccinii • 31 
densissima 30 
diffusa 33 
elevata 31 
euphorbiae 33 
extensa 32 
friesii 30 
grossulariae 32 
hedwigii 30 
menispermi 30 
platani 30 
pulchra 30 
quercina 30-32 
ravenelii 30 
russellii 33 
semitosta 30 
symphoricarpi 33 
Phyllactinia 37 
corylea 37 
corylea tomentosa 38 
guttata 37 
suffulta 37 
Podosphaera 23 
kunzei 23 
leucotricha 24 
minor 23 
oxycanthae 23 
tridactyla 23 
Sphaerotheca 20 
castagnei 20-21 
epilobi 20 
humuli 20 
humuli fulginea 21 
mors-uvae 22 
pannosa 21-22 
phytoptophila 22 
pruinosa 20 
Uncinula 34 
adunca 34 
americana 35 
ampelopsidis 35 
circinata 36 
clintoni 37 
geniculata 37 
heliciformis 34 
intermedia 36 
macrospora 36 
necator 35 
parvula 36 
salicis 34 
spiralis 
