206 BROOKLYN BOTANIC GARDEN MEMOIRS 
This species differs from C. Abtetis in the narrower, somewhat 
smaller spores which do not long remain in chains but soon break 
apart. No evidence of germination has been seen in any of the col- 
lections. This is the only American representative of the genus as 
restricted by Arthur. (Result Sci. Congr. Bot. Vienne 338. 1906.) 
It is known to the writer otherwise only from single collections from 
British Columbia and Idaho. It is doubtless not uncommon in the 
northwest. , 
7. CRONARTIUM FILAMENTOSUM (PK.) Hedgcock, Phytopath. 2: 177. 
IQI2. 
Peridermium filamentosum Pk. Bot. Gaz. 7: 56. 1882. 
Uredo coleosporioides Dietel & Holway, Erythea 1: 247. 1893. 
Peridermium stalactiforme Arth. & Kern, Bull. Torrey Club 33: 
419. 1906. 
Cronartium coleosporioides Arth. N. Am. Flora 7: 123. 1907. 
On PINACEAE: I. 
Pinus contorta Dougl.—Scotts, Anna Creek, Klamath Co., May 23, 
1912, E. P. Meinecke, used for inoculation on Castilleja miniata; Gold 
Center, June 20, 1914, H. F. Wilson, 7856; North slope Mt. Hood, 
elev. 3,000-4,000 ft.; Aug. 7, 1914, 3332; Sumpter, Baker Co., 
May, 1916, J. R. Weir. 
On SCROPHULARIACEAE: II, III. 
Castilleja sp.—North slope Mt. Hood, 3,000-4,000 ft., Aug. 7, 
1914, 1612, 1615 (collected near 3332); Ashland Toll House, Jackson 
Cos, Sept. 27; 1913, E: P..Meimnecke, Cr D 22. 
Hedgcock (I. c.) was the first to publish a record of connection 
of Peridermium filamentosum with a Cronartium on Castilleja by cul- 
tures. He considered this distinct, however, from Cronartium coleo- 
sporioides, which Meinecke had cultured in 1911 (Phytopath. 3: 167— 
168. 1913) and shown to have for its aecial form P. stalactiforme. 
Meinecke’s culture material was collected in Klamath Co., Oregon. 
Further culture work has been carried on by Weir and Hubert 
(Jour. Agr. Research 5: 781-785. 1916) in which it is shown that 
the gall-forming Peridermium on Pinus contorta which has previously 
been commonly referred to P. Harknessit Moore is but a form of P. 
filamentosum. 
All the records of the aecial stage given above are of the gall- 
forming type. The Hood River material was collected in the im- 
mediate vicinity of the telial form on Castilleja. 
8. CRONARTIUM PYRIFORME (Pk.) Hedgc. & Long, Alt. Stage Peri- 
dermium pyriforme 3, 1914. 
Peridermium pyriforme Peck, Bull. Torrey Club 6: 13. 1875. 
