36 THIRTY-FOURTH ANNUAL REPORT OF THE 
Pers., Oospora candida, Wallr., Oidium Wallrothii, Thum., Monila 
Sructigena, Sacc., Acrosporium fructigenum, Pers., and Oidium laxum, 
Ebr. 
Spheropsis malorum, Berk. Apple Spheropsis. (Plate 4, figs. 16— 
21.) It is not an uncommon thing to find apples in Autumn lying 
under the trees of the orchard and discolored by an incipient decay. 
Sometimes this discoloration is seen in them while yet hanging on the 
trees. It is the work and earliest manifestation of the presence of a 
fungus, distinct from those already noticed. It has the usual brown 
hue of decay produced by the mycelium of some other apple-infesting 
fungi, and it is not easy to say just what fungus is causing the decay 
until the fertile condition of the parasite makes its appearance. In 
this case the discoloration is soon followed by the appearance of nu- 
merous minute black pimples or pustules. These are at first covered 
by the thin epidermis, but soon this is ruptured and the black, some- 
what conical protuberance beneath is revealed. This is the spore-case 
of the fungus. In due time it contains a cluster of spores which are 
generally about twice as long as broad, and which range from eight to 
twelve ten-thousandths of an inch in length. They are at first pale 
- in color and supported on a short stem or pedicel, but when mature 
they become black or blackish-brown, separate from their pedicels and 
escape through a minute aperture at the apex of the spore-case. The 
spores are not always developed as soon as the spore-cases appear. 
Sometimes fertile spore-cases are found in Winter or even in the fol- 
lowing Spring. The specific part of the name of this fungus, Sph@rop- 
sis malorum, is derived from the Latin mala, a word meaning apples. 
The generic name is suggested by the resemblance these fungi have 
to species of Spheeria. There is another genus called Diplodia which 
scarcely differs from Spheeropsis in any respect except that its spores 
are divided in the middle by a transverse septum. In some instances 
this mark of distinction between the two genera fails, for both divided 
and undivided spores may be found in the same spore-case. And even 
both so-called genera are now regarded by excellent mycologists as mere 
forms or states of more highly developed fungi. For other remarks 
coucerning this fungus see 'Thirty-first Report, page 20. 
(1.) 
PLANTS MOUNTED. 
Not new to the Herbarium. 
Thalictrum diocium..,....... L. Proserpinaca palustris........ LL. 
Actpavalbae) si.ls bee jn peeigel. Cornus circinata ............ L Her. 
Viola Selleirkii 2 (eats ses raat Goldie. Dipsacus sylvestris........... Mill. 
Hypericum mutilum......... LL. Aster GumOsilsi).\.-. cu leneeen a 
Linnm, striatum. 15 05/064 0056 Walt. A. SricOldes),,.’.....) ae Ds, 
Vitis riparia... ...-.++++++05. Mz. A. Tradeseanti,...\.: eee L. 
Juonymus Americana........ L. Solidago altissima..... ...... Uap 
Trifolium repens..........4.. L. 8. gigantea Pe: |. 2 a Ath 
Lespedeza reticulata......... Pers. Polymnia Canadensis,........ L. 
Desmondium rotundifolium... D. @. Hieracium venosum,......... L. 
RIDER UIT POLMLIMs brlete ie. phy ae Ma. Vaccinium Pennsylvanicum.. Lam. 
R. rotundifolium.......... Mz. Gerardia tenuifolia.....,..... Vahl, 
