92 
region in 1890 it was rare on unfertilized trees, but very common on 
those which received complete fertilizers, especially on the lower and 
inner leaves. The conidia develop on the under surface of the leaf, 
often in restricted areas visible above as yellow or yellowish green 
patches with definite margins. Very late in the season, before the fall 
of the leaves or afterward, pycnidia develop on the conidial surface and 
in the body of the leaf in such a manner as to lead one to believe them 
a part of the cycle of development. These were first observed in 1890 
and again in 1891. Other bodies similar to the phorna conceptacles, but 
destitute of spores, accompany these, and a search toward spring woidd 
perhaps reveal the presence of ascospores, and might lead to the deter¬ 
mination of the true position of this form-genus. 
PEACH RUST.* 
Puccinia pruni-spinosce occurs but rarely in this latitude (39°), and 
then mostly on thickly planted nursery stock. In Georgia it is more 
abundant, but there also it appears to prefer nurseries to orchards. 
Last year and this year it did not attack the trees until after June. 
In a yard at Griffin a number of small seedlings were free from rust the 
1st of last July and so badly affected when reexamined in November 
that it was almost impossible to find a sound leaf. Most of the leaves 
bore dozens of sori. The upper surface of the leaf was either a uniform 
yellowish green or a bright green with sharply defined yellow spots 
corresponding to the sori on the under surface. As in another locality 
the preceding year, the leaves nearest to the earth were observed to be 
most badly attacked. The autumn of 1891 was very dry, the first rain 
of two months occurring on November 10. At Vineyard, Georgia, in 
1890, it was also observed that the fungus spared the parent tree but 
attacked the foliage growing from *buds which were taken from it and 
set into seedlings in another locality on June 23. 
PEACH ROT.t 
In eastern Maryland and Delaware it rained every few days during 
the peach season, and was frequently warm and cloudy between 
showers. In consequence the brown rot, due to Monilia, was very preva¬ 
lent. The blight of blossoms and twigs has already been described in 
Vol. vii, pp. 37-38, of this Journal, in some cases as many as twenty 
blighted blossoms were found on a single twig, but in spite of all acci¬ 
dents the peach crop above the frost line was enormous. The abundance 
of this fungus in 1891 contrasts strikingly with its rareness in 1890, 
when there was no fruit, and raises the question how it tided over the 
year of famine. 
* I’ncciiiia )>nnii-npino8(t } , Pen*, 
t Aloitilid JntcCujeita, Vers, 
