BULLETIN OF THE BUSSEY INSTITUTION. 231 
shape, and furnished with a single cilium. The zodspores in a very 
few cases were provided with two cilia, but these were rare excep- 
tions. Owing to other occupations, the observation of the further 
development of the zodspores and the inoculation of healthy leaves 
was not attempted. The development of the spores just mentioned 
is precisely that described by De Bary and Woronin* in Synchitrium 
Taraxaci. We had prepared drawings of our own species, but they 
were rendered quite superfluous by the fact that, except in the size of 
the spores, they were essentially the same as those already given by 
De Bary and Woronin. The resting-spores of our species we have not 
_ yet been able to detect, although the plant has been carefully watched 
from June until October. As before said, some of the spots appear of a 
browner color than the rest and we had hoped in these to find resting- 
spores. In all cases, however, their microscopic structure was the same 
as that of the yellow spots and where the resting-spores are to be sought 
is still uncertain. The species differs from S. Zaraxaci in the much 
smaller size and greater number 0 the spores (zodsporangia), and in 
their bright yellow color. ‘The swellings produced in the leaves are 
more marked, and the cup remaining after the discharge of the spore 
more distinct. We cannot, however, specifically distinguish the fungus 
on Amphicarpea from that found by Schroeter on Gnothera biennis, 
and named by him Synehitrium fulgens. Our plant forms spots which 
are somewhat larger and more highly colored than those on Génothera, 
and the spores themselves are somewhat smaller than in specimens 
received from Dr. Stahl, gathered in Rastatt, Baden. We would call 
the fungus Synchitrium fulgens, Schroeter, var. decipiens. Possibly, 
when the resting-spores are found, there may be grounds for separating 
the species. Being occupied with other duties, we had no time for 
ascertaining whether the spores from Amphicarpea would produce the 
disease on Cnothera. 
There is still a fourth species of Synchitrium found on the leaves of 
Marrubium vulgare, on which it forms small, ill-defined purple spots. 
The species belongs to the third of Schreeter’s division of the genus 
(Leucochytrium) with whitish protoplasm. The diameter of the 
spores which are solitary in the cells, and which are probably resting- 
spores,— at any rate, we have never succeeded in making them ger- 
minate, —is from .06—.075 mm. and there is no external swelling of 
* “ Ann. des Sciences,” 5 série, vol. iii. 
