238 : BOTANICAL GAZETTE 
yellow spots looking like a uredo on Amphicarpea monoted. | Th 
leaves may be gathered and placed in a moist place, or dippe 
into water on glass slides or in watch-glasses. In a few hours 
the water will be colored orange from the abundance of escaped 
zoosporangia and zoospores. All the stages of development may 
easily be seen, and healthy leaves may be infected by leaving 
them a short time in the water and then removing them and keep 
ing them in a moist place fora few days. One who wishes to ex- 
periment on the motions of chlorophy]-free zoospores can eae 
an abundance of zoospores by placing a few infected leaves 0 
Amphicarpea in glasses of water. 
not very destructive. Unlike many other fungi which attack 
living plants, the Synchytria are supposed not to be limited to one 
species of host, or to species nearly related botanically, but the 
same Synchytrium may inhabit plants belonging to ditterent oF 
ders. The species of Synchytriu are distinguished by the pret 
ence or absence of summer sori, the nature of the galls or de- 
formities produced, and the shape and size of the resting _ : 
and it may be asked how far these points might be modified H 
the host plant in case of species which are said to inhabit sever 
different hosts. A study of the development and cultures af 
necessary in order to settle the limits of the species accurately. ss 
The following account includes all the species known toe 
in the United States, € synonyms are given with Papen 
to American works where the species are mentioned, an’ also ee aL 
original European references. Of the species not yet know? . 
this country we might expect to find S. Tarazaci, D.By: @ 
Wor., 8 Stellarie, Fuckel, and S. globosum, Schrt. on Viola. 
SYNCHYTRIUM D. By. & Wor. vo 
Unicellutar fungi inhabiting the epidermal cells of living plants, entirely es 
mycelium. Reproduction by 7 
resting spores and sori containing 20 
which are produced 
‘ ope ee ion We 
2008pores having one, or rarely two, cilia. Conjugation 
j both 
A. Eusyncuyrrivy. Resting spores and summer s0Fl 
present!, 
anting. 
— jon to 
__, In S. decipiens, here placed on account of its apparently close relaot 
S. Tarazxaci and 8. fulg ona: 
ens, NO resting spores have yet been foun 
