290 DopGE: STUDIES IN GENUS GYMNOSPORANGIUM 
GYMNOSPORANGIUM GLOBOSUM 
The inoculations of cedars with G. globosum were made in 
1914 and 1915 under the conditions described in the preceding 
experiments. The results appear in TABLE III. 
TABLE III 
INFECTION OF THE RED CEDAR WITH G. globosum 
Height of cedars in inches 
No. SU meas a et er hte ot. Results, number d 
°. Feb. Feb., Feb., Visi Viancchation at pals Spores mature 
IgI4 1915 1916 1917 
IOI 
405 6 sae) I5 a3 June I5 March 7, 1916 
407 12 22 35 50 June 25 5 Feb. 28, 1916 
408 II 20 30 48 June 20 (0) 
IQIS 
401 II 16 24 38 Aug. I ts) 
402 14 ? 26 a7 Aug. I oO 
403 7 I2 26 35 Aug. I 2 March 10, 1917 
405 6 10 15 23 Aug. I I April 4, 1917 
416 Io 14 +7 24 Aug. I te) 
The first indications of infection were discovered August 1, 
1915; there were two small green galls on plant No. 407. 
The writer is rather inclined to disregard these galls, especially 
as they were on the lower branches and grew to considerable size 
like those one finds in nature. There were no sorus-scars such as 
we should expect to see if the plants had been infected in nature in 
1913. The other galls were clearly the result of inoculation as 
most of them developed at points on the plants represented by 
new growth since they had been brought in. None of the fifteen 
leaf galls on plant No. 405 developed sori a second time. The ones 
on No. 407 matured spores two seasons. Most of the large galls 
on naturally infected plants, so far as observed, bore sori three 
years in succession. There is no record of one bearing four crops 
of spores. It was impossible to inspect the cedars thoroughly 
during July and August, so that it is uncertain at just what 
time the galls made their first appearance. Most of them were 
visible in September, although some of the galls of G. globosum 
were so small that they might have been overlooked. In some 
cases there is very little hypertrophy of the leaf tissue upon which 
they appear. Weimer ieee has very adequately described these 
smal] galls. 
