JACKSON: UREDINALES OF OREGON 207 
Cronartium Comandrae Peck, Bull. Torrey Club 11: 50. 1884. 
Peridermium Betheli Hedge. & Long, Phytopath. 3: 251. 1913. 
On PINACEAE: I. 
Pinus ponderosa Dougl.—Hood River Co., May 10, 1910, 3333; 
Sumpter, Baker Co., May, 1916, J. R. Weir. 
On SANTALACEAE: II, III. 
Comandra umbellata (L.) Nutt.—Corvallis, June 20, 1909, E. R. 
Lake, 3068, July 24, 1914, 2510, Road to Ashland toll house, Jackson 
Go, cept. 27, 1913, E. P: Meinecke; Cr D°23; Hood River Co:, June 
20, 1914, 1995, July 22, 1915, 3143; Dufur, Wasco Co., June 30, 1914, 
1337; Indian Creek, Malheur Co., Sept. 16, 1897, E. P. Sheldon, 8934. 
The collection of aecia on Pinus ponderosa made at Hood River 
consisted of a large fusiform gall at the base of the trunk of a young 
tree about 2 inches in diameter. The gall entirely encircled the tree 
which was noticeably stunted from the effects of the parasite. The 
foliage also showed a distinct yellow cast. 
The life history of this common and widespread species was first 
demonstrated by Hedgcock and Long (Il. c.). They succeeded in 
obtaining the development of uredinia on Comandra umbellata by 
exposing them to infection from aecia on Pinus ponderosa collected in 
Washington and California and on Pinus pungens from Pennsylvania. 
In a later publication the authors (Bull. U. S. Dept. Agr. 247: 1-20. 
1915) discuss the economic importance of this fungus as a disease of 
pines and record in detail the results of extensive culture work. 
g. HyALopsora Aspipiotus (Peck) Magn. Ber. Deuts. Bot. Ges. 19: 
582. I9gol. 
Uredo Aspidiotus Pk. Ann. Rept. N. Y. State Mus. 24: 88. 1872. 
ON POLYPODIACEAE: 
Phegopteris Dryopteris (L.) Fée—Austin, Grant Co., Aug. 1915, 
J. R. Weir, 764. 
10. HYALOPSORA LAEVIUSCULA (D. & H.) Arth. North Am. Flora 7: 
LEZ: 1907. 
Uredo laeviuscula Dietel & Holway, Erythea 2: 127. 1894. 
ON POLYPODIACEAE: 
Polypodium occidentale (Hook.) Maxon—Vicinity of Mt. Jefferson, 
July 27, 1907, E. R. Lake, 2508; Corvallis, March 25, 1915, G. B. 
Posey, 2626; Hood River Co., May 16, 1915, 3042; Bridal Veil, 
Multnomah Co., May 18, 1915, 3025. 
Polystichum munitum (Kaulf.) Presl., Mary’s Peak, Benton Co., 
Apr. 23, 1915, G: B. Posey, 3041. 
The urediniospores in this species are smooth in all collections as 
shown by very careful examination with the oil immersion objective. 
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