68 
NEW ZEALAND FUNGI. 
Pyrenophora nuda. Clce.rp.nov. 
Sparsa, cuticula nigrofacta tecta, glabra ; cellulis, brunueis. 
Ascis clavatis. Sporidia biseriatis, ellipticis, medio constrictis, 
brunueis, septatis, muriformibus (-03 X 015 mm). 
On leaves of grass. Tauranga (399). 
There are no true perithecia. The cells surrounding the peri- 
thecial cavity are brown, globose, and readily separable. 
BXicrothyrium microscopicum. Besm. Ann. Sex. Nat., 1841, 
t. 14,/. 1. 
On leaves of Dacrydium. Maungaroa (322, 323). 
Erysiphe densa. Berk. in FI. A. Zeal.,t. 106,/. 16. 
On leaves of Aristotelia. Dunedin, Waitaki (296). 
Meliol'a amphitricha. Fr. Berk, in FI. N. Zeal, ii., 209. 
On leaves. Melbourne (381). 
ON THE PROPAGATION OF S PH ARIA {GNOMONI A) 
FIMBRIATA (Pers.). 
By Charles B. Plowright. 
In December, 1878, I planted in my garden two small specimens 
of hornbeam ( Carpinus betulus), which were found growing in a 
hedge, and had still attached to their branches the withered leaves 
plentifully attacked by the Sjjhceria. Owing to their removal, the 
old leaves of these shrubs fell off, and were blown away long 
before the green leaves burst their buds in spring, which did not 
take place until the end of May. 
On the 1st June, I tied four fragments of a leaf, each of which 
contained a cluster of perithecia with mature sporidia in them, 
upon four places, on one of the hornbeams. It was found most con- 
venient to attach these fragments between the leaves of a terminal 
bud, and to retain them in situ by a twist or two of sewing cotton. 
The experiment was watched from time to time, but it was not 
until the 12th July that anything was observed. On this day, 
however, numerous minute black specks were visible upon the 
leaves experimented upon. The cotton was then unwound and the in- 
fecting fragments removed. In due course the black spots developed 
into typical specimens of Sphceria fimbriata. The hornbeams have 
been under observation ever since, but up to the present time 
(November) no further development of the Sphceria has taken 
place. This is the more noteworthy because the shrub which was 
not subject to experiment had, when first planted, the greater 
number of affected leaves upon it, but on not a single leaf has the 
parasite shown itself this year ; nor on the other hornbeam has a 
single perithecium developed itself, save at the points inoculated. 
I have thus the pleasure of confirming my friend, Dr. Max 
Cornu’s conclusion, that these ascigerous parasites are confined to 
