270 BOTANICAL GAZETTE [APRIL 
produced a wealth of ecidia. From these facts one, would infer 
that szcidia on Rumex should be common, for the teleutosporic 
condition occurs throughout the United States. Yet I am not 
aware of a single authentic record of ctdium rubellum being 
found in North America. To be sure, it occurs in the earliest 
published list of American fungi by Schweinitz, who was a 
notably accurate observer. But his remark that the spots were 
usually sterile, makes it fairly certain that what he collected 
were not ecidia, but the spots made by fungi imperfect. Both 
Professor Bessey and Dr. Davis at my suggestion made repeated 
and thorough search about the places where the teleutospores 
were found in their localities, but saw no zcidia. Improbable 
as it may seem, there yet appears to be no explanation of the 
remarkable vigor of this heteroecismal species, but to suppose 
that the ecidia do occur in America, and that, so far, they have 
been overlooked. : 
2. Puccinta ConvoLtvuti Cast. 
The teleutospores of this very common species of rust on 
Convolvulus sepium were sown on the host, before the weather 
permitted it to start out of doors, and were duly followed by 4 
rich development of spermogonia and subsequently of ecidia. 
It was thus experimentally shown to be an autcecious species, as 
has always been tacitly accepted. The dates are as follows: 
May 8, Teleutospores sown; May 16, spermogonia; June 6, xcidia. 
3. Puccinra Caricis (Schum.) Reb. 
The ecidiospores from 4cidium Urtice were sown May 17 08 | 
the young leaves of Carex stricta and in eleven days were fol- 
lowed by uredospores. A sowing at the same date on Carex 
cephalophora gave no infection. This shows that Carex siricta 's 
a host for Puccinia caricis, but there is reason to believe that it 
also acts as a host for other species of Puccinia. The American 
rusts on Carex are yet little understood. 
4. Uromyces Eurpuorsiaz C. & P. 
There has been an almost uniform opinion among American 
botanists that the AEcidium occurring abundantly upon many 
. 
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