64 
Mycologia 
Negative results. — It has been customary in these reports to 
record failures to ascertain the alternate host, when sowings were 
made with spores known to be capable of germination and made 
upon plants that were in proper condition for infection. As the 
work progresses, and fewer species are left to be connected with 
alternate hosts, the need of such records diminishes, especially as 
more and more dependence is placed upon field observations for 
the clues to relationship. A few trials during the last three years 
with negative results appear to be sufficiently significant to be 
worthy of record at this time. 
1. PucciNiA McClatchieana Diet. & Holw. — A collection of 
this species on Scirpus microcarpiis (S. rubrotinctus) , from 
Vaughns, Washington Co., N. Y., sent by Mr. Stewart H. Burn- 
ham, was used for sowings made April i, 1914, on Che'lone 
glabra, Hydrophyilum virginicum, H. Fendleri, Actaea alba, Dirca 
palusfris, and Iris versicolor, all without infection. 
This species has been confused with Puccinia angustata Peck. 
The name was first applied to a Californian collection thought to 
be on Scirpus sylvaticiis, but now determined as N. microcarpus. 
It is a common species along the Pacific coast on the last named 
host, known in one instance as far into the mountains as Belgrade 
near Bozeman, in southwestern Montana. It also occurs along 
the Atlantic coast on the same host (usually called Y rubro- 
tinctus), being known from Nova Scotia to Delaware, and inland 
as far as Albany, N. Y. It was a collection of this species and 
host that was cited by Peck in establishing his Puccinia angustata, 
as on “Scirpus sylvaticum,” from West Albany, N. Y. No clues 
to the identity of the alternate host have yet been secured. 
2. Puccinia Cryptandri Ellis & Barth. — A good teliosporic 
collection of this rust on Sporobolus cryptandrus was obtained 
by Dr. Fromme and the writer February 20, 1914, at Mesilla Park, 
N. Mex., and sown March 20 on Sphaeralcea lobata, S. incana, 
and Callirhoe digitata. Eight days later it was sown on other 
plants of N. incana and C. digitata, and on Hibiscus militaris. 
Again on March 9, it was sown on Hydrophyilum Pendleri, Pha- 
celia tanacetifolia, Thalictrum Pendleri, and Abronia umbellata. 
A collection similar to the last was obtained on the preceding 
day, but thought at the time to be Puccinia tosta, which was 
