Jan. 1904] 
Cultures of Uredineae in 1903. 
15 
sent to me in March by Mr. Elam Bartholomew, from Rockport, 
Kans. Seeds of the host were also sent, from which young plants 
were grown for culture work. A sowing was made on April 27; 
on May 11, the spermogonia began to appear, and on May 18, 
the aecidia. One later sowing was also successful, but the host 
plants did not flourish, and the results were meager. The demon¬ 
stration, however, proved ample to establish the autoecious char¬ 
acter of the species. 
The aecidium of this species is so rarely seen as to give rise 
to the conjecture that the species might not possess an aecidium. 
The species is usually listed under Puccinia nigrescens Pk. This 
specific name, however, belongs to the somewhat similar Euro¬ 
pean species, as pointed out by Bubak, who unnecessarily be¬ 
stowed the new name P. Salviae-lanceolatae upon the American 
form. The rust occurs commonly upon the leaves, but is so much 
more conspicuous upon the stems, especially after the leaves have 
partly or wholly fallen, that most collections show the caulicolous 
form only. 
5. Uromyces on Carex. —A species of Uromyces on Carex 
was found at Fair Oaks, Ind., on March 22 in very great abund¬ 
ance, and in fine viable condition. The Carex grew in an open 
sandy woodland, but in a depression of the surface where water 
sometimes gathered during heavy rains. It grew in tufts over 
a half acre of ground, and belonged to two species, C. lanugi¬ 
nosa Michx., easily told from the abundance of last year’s fruit¬ 
ing culms still present, and C. varia Muhl., which showed not a 
trace of last year’s culms, and was determined from the fruiting 
of a plant transferred to the greenhouse, and verified by a subse¬ 
quent visit to the locality on May 3. On this latter visit a care¬ 
ful search for aecidia was made in the vicinity of the rusted 
Carex, but a few young leaves of a Solidago with spermogonia 
were the only result. These were growing with leaves inter¬ 
mixed and well surrounded by the rusted Carex. This was a 
very doubtful clue, as the common Solidago aecidium is known 
to belong to a Puccinia, yet experience has taught that the most 
improbable clues are not to be despised when the evidence is 
direct. Before finding this clue, sowings of the rust on Carex 
varia had been made on Viola Cucullaria, Isopyrum biternatum, 
Trillium recurvatum, Ribes Cynosbati and R. aureum with no 
infection. After the clue was obtained it was sown on five 
species of Aster with no infection, and on five species of Solidago 
with abundant infection. The following is the record of the 
latter. Sown May 6 on S. Canadensis L., showing abundant 
spermogonia on May 14, and aecidia on May 22. A sowing May 
26 on S', serotina Ait. gave first spermogonia June 5, and aecidia 
June 16, the results being especially good. An equally successful 
culture was made on each of the two hosts at subsequent dates. 
Positive but less flourishing cultures were made on S. dexicaulis 
