JACKSON: UREDINALES OF OREGON 213 
Melampsorella Cerastit (Pers.) Schroet. Krypt. Flor. Schles. 3!: 
2060.1 E887. 
On PINACEAE: I. 
Abies grandis Lindl.—Mary’s River, west of Wren, Benton Co., 
Aug. 2, 1914, 1297; Sumpter,-Baker Co., July 20, 1913, J. R. Weir, 
270. 
Abies lasitocarpa (Hook.) Nutt.—Crater Lake, Klamath Co., 
Sept. 9, 1916, J. R. Weir, 209; Sumpter, Baker Co., July, 1913, J. R. 
Weir, 274. 
On CARYOPHYLLACEAE: II, III. 
Cerastium vulgatum L.—Corvallis, May 1, 1915, 2667. 
Cerastium viscosum L.—Corvallis, June 28, 1915, 3079. 
Stellaria borealis Bigel.—Corvallis, April 5, 1914, 7287. 
This rust, which is doubtless common throughout the state, is 
remarkable in that both stages develop from a perennial mycelium. 
The aecial stage forms large or small witches’ brooms on the branches 
of various species of Abies, each leaf of which bears the conspicuous 
aecia in two rows on the under surface of the leaves. 
The life history was first worked out by Fischer (Zeitschr. fiir 
Pflanzenkr. II: 321. 1901) and has been amply confirmed by other 
European investigators. A summary of this work has been made by 
Klebahn (Die Wirtsw. Rostpilze 397. 1904). 
In America Arthur (Mycol. 4: 58. 1912), using aecial material on 
Abies lasiocarpa collected in Colorado, has succeeded in obtaining 
infection resulting in uredinia on Cerastium oreophilum. 
21. MELAMPSOROPSIS PIPERIANA Arthur, N. Amer. Flora 7: 120. 
1907. 
ON ERICACEAE: 
Rhododendron Californicum Hook.—Newport, Lincoln Co., June 
2, 1892, A. Isabel Mulford (Specimen in Herb. N. Y. Bot. Gard. and 
in Herb. J. C.. Arthur), May 16, 1914, G. H. Godfrey, 1280; Larch 
Mt., Multnomah Co., Aug. 1910, rz18; Parmelia Lake, near Mt. 
Jefferson, July 3, 1914, F. D. Bailey, 1939; Trail to Hanging Valley, 
near Mt. Jefferson, Aug. 11, 1914, H. P. Barss & G. B. Posey, 1623. 
22. MELAMpPSOROPSIS PyROLAE (DC.) Arth. Résult Sci. Congr. Bot. 
Vienne 338. 1906. 
Aecidium (?) Pirolae DC. FI. Fr. 6: 99. 1815. 
Aecidium conorum Piceae Reess, Abh. Nat. Ges. Halle 11: 102. 
1869. 
Chrysomyxa Pirolae Rostr. Bot. Centr. 5: 127. 1881. 
Peridermium conorum Piceae Arth. & Kern, Bull. Torrey Club 33: 
AZESS tI COG: 
