398 BOTANICAL GAZETTE | JUNE 
Wehmer* points out, va/garis is more appropriate for so univer- 
sal a species. 
The following disease is a good type of this class: 
A NEW DISEASE OF THE LINDEN. 
In the spring of 1898, while working in Professor R. Hartig’s 
laboratory at the University of Munich, the writer received sev- 
eral specimens of 77/ia parvifola which had been found in the 
nursery by Dr. von Tubeuf and appeared to be diseased. They 
were found among a considerable number of small saplings 
three to five feet high, growing close together in the usual nur- 
sery beds. At this time most of the trees were entirely leaved 
out, but these individuals had been noticed on account of their 
buds being not yet unfolded, though still green and apparently 
sound. The branches and upper part of the stem were also 
green and fresh, showing no abnormal symptoms, and the same 
was true of the roots. But in the lower part of the stem, from 
the surface of the ground up to a height of several inches, an 
abnormal condition was evident. Upon the surface of this part 
of the stem numerous excrescences were found, breaking out 
through the epidermis, with a thickness of about 0.5™", and 
varying greatly in shape and size. Some were nearly round, 
others irregular, and still others long and narrow, extending 
parallel with the stem, or more often around it. The latter 
form had a maximum length of about 2™, while the more cit- 
cular ones had a diameter of 0.5°, or less. They had a dusty 
gray color and gave the stem an appearance somewhat like that 
of one affected with a Peridermium. TZeat fig. 3 is from an 
excellent photograph of an affected stem, made by Dr. von 
Tubeuf. It was evident that the production of these excres- 
censes was proceeding from below upward, as the longest were 
just above the surface of the earth, while further up on the stem 
very small ones were just breaking out through the epidermis. 
In the affected part of the stem the wood and bark were dis- 
colored and evidently dead, but above and below it the tissue 
4 Zeitschr. f. Phanzenkrankh. 4: 209. 1894. 
