Sphaerobolus, 7'ode. 
S. stellatus, Tode. 
On — idus ~ a plan 
house. A minute but = 
beautiful fuori pl first ball- 
shaped, then splitting above 
into severa! teeth, and eject- 
ing to some distance a little 
138 
| Sphaerobolus—cont. 
| 
yellow bail containing the 
pores. 
Thelebolus, Tode. 
T. terrestris, A/b. $ Schw. 
On heaps of dead leaves. A. 
ASCOMYCETES. 
Pyrenomycetes. 
ERYSIPHE. 
All the species belonging to this family are parasites, and in some 
The 
instances very de 
structive to cultivated wis 
hey appear under the 
form of a delicate white film on living leaves 
Podosphaera, Kunze. 
P. Oxyacanthae, De Bary. 
On living leaves of Crataegus. 
Common. 
P. tridactyla, De Bary. 
On living leaves of various 
species of Prunus. Common. 
Sphaerotheca, Lév. 
S. pannosa, Lév. 
— 
eh. and fruit of ihia 
es. A dangerous enemy 
fo roses, causing the foliage 
to drop prematurely. 
S. Castagnei, Lev. 
On living leaves of various 
cucurbitaceous plants. When 
ndantly developed, the 
leaves present the appearance 
of having received a coat of 
whitewas 
Phyllactinia, Lév. 
P. suffulta, Saccardo. 
On leaves of Lonicera, on 
alba, Cornus sanguine 
Uncinula, Lév. 
U. Bivonae, Lév. 
On living leaves of Ulmus 
campestris 
U. adunca, Lev. 
On leaves of Populus nigra. 
Uncinula—cont. 
U. i, Saccardo. 
On leaves of Prunus spinosa. 
U. Aceris, Saccardo. 
On living | — of Acer Pseu- 
dopla 
Microsphaera, Lév. 
M. Dubyi, Zév. 
On living leaves of Lonicera 
Shee, 
M. Berberidis, 
On rie, ‘ue of Berberis 
M. psa ; 
On living leaves X Lonicera 
sempervirens and Betula 
pubescens. 
Erysiphe, Hedwig. 
E. lamprocarpa, Zév. 
On living leaves of Aster 
grandiflorus, Centaurea ni- 
grescens, Cousinia uncinata, 
and many other composites. 
4 
E. Umbelliferarum, De Bary. 
On living leaves of many um- 
belliferous plants. Common. 
E. communis, Fries. 
On living leaves of various 
plants. Common. 
