3 
teach the truth that fungicides, as at present employed, are far 
stronger than they may need to be. Ifa bit of metallic copper 
in pure water will hold its own weight, or many times that, of 
spores inactive, it seems likely that the time has come to try a 
weaker solution of copper. 
Since the above was written opportunity has offered to test 
the spores of a species of Fusarium and those of Cercospora Api, 
the celery blight, both of which germinate with remarkable rapid- 
ity in water. When surrounded with their congenial food, that 
is, an extract of the host-plant, the rate over that of pure water is 
augmented many times. When copper is added to the water 
the spores fail to germinate, or in short, the results are the same 
as those reported for Monilia. 
Similar experiments have been made with metallic zinc, but 
even when the spores were literally surrounded by the granulated 
metal they grew with vigor. A powdered form of metallic zinc 
was also used, and even in abundance had no retarding effect. 
Some Notes on Tripterocladium leucocladulum, Muell. 
As already noted in the BULLETIN, xviii. 55, this species, 
but once before found in fruit, has again been collected fertile. 
In April, 1890, we first observed it, depending in long, wide 
festoons, sterile, from shelving granite ledges along the shores of 
Lake Pend d’Oreille, Idaho; a month later, up a cafion, we found 
it again, abundantly fertile, growing very luxuriantly in large, 
compact masses, on ledges of dolomite as well as on the trunks 
and branches of Zaxrus brevifolia and Thuya gigantea. Last 
spring we met it again, fertile, on ledges of porphyritic-granite. 
As is the case with most of the mosses here, it fruits at any 
season of the year, all depending upon the rainfall, but most 
abundantly during the winter when covered by four to six feet of 
snow. 
The species varies greatly in its mode of branching, leaves, 
capsule, length of pedicel and size of plants. Typically, the 
Primary stem is long, creeping, very slender, brown, of a horny 
Consistency and sparsely beset with very small squamiform leaves. 
From it arises long, slender flagelliferous branches 8-15 cm. long, 
and shorter and more robust ones 4-6 cm. in length. The flag- 
