1919] BlasdaLe: Uredinales of California 109 



14. Cronartium pyriforme (Peck) Hedg. and Long. 0, I, II, III 



Bull. Torr. Club, vol. 6, p. 13, 1875, and vol. 11, p. 50, 1884. 



Aecia on Pinus ponderosa Dougl. (Peridermium pyriforme Peck) 

 Rocky Gulch, Siskiyou County (Meinicke). 



Uredinia and telia on Comandra umbellata (L) Nutt. (Cronartium 

 Comandrae Peck), Shasta Springs. The genetic connection between 

 these forms was shown by Hedgcock and Long (Bull. 247, U. S. Dept. 

 Agr., 1914), also by Kirkwood (Phytopathology, vol. 5, p. 233, 1915). 



15. Cronartium Quercus (Brond.) Schrot. 0, I, II, III 

 Sacc. Michelia, vol. 2, p. 308, 1881. 



The aecial stage (Peridermium Harknessii Moore) produces 

 globose galls often of large size on branches of Pinus radiata Don, and 

 is sometimes very destructive. Also on P. attenuata Lemmon, P. muri- 

 cata Don and P. ponderosa Dougl. in the central Coast Ranges. 



Uredinia and more rarely telia on Quercus agrifolia Nee., Q. Kel- 

 logii Newb. and Pasania densiflora Oerst., Gilroy, Mount Diablo, 

 Monterey (Meinicke), Mill Valley (Bethel), Santa Barbara (Bethel) ; 

 on Q. dumosa Nutt., Pasadena (McClatchie). 



There seems to be no essential difference between the eastern and 

 western forms of this species, although culture experiments are needed 

 to prove this conclusively. Meinicke (Phytopathology, vol. 6, p. 225, 

 1916) has shown that aecial spores from Pinus radiata could be made 

 to reproduce aecia on the same host without an intervening stage; 

 also that the fungus winters over in the uredinial stage on the leaves 

 of Quercus agrifolia. 



ERIOSPORANGIUM (BERTEBO) LEV. 

 Ann. Sci. Nat., ser. 3, vol. 5, p. 269, 1846. 



Aecia usually indefinite, peridium usually fragile. Uredinia 

 definite, without paraphyses. Teliospores two-celled, usually pale or 

 colorless. 



16. Eriosporangium evadens (Hark.) Arthur. 0, I, II, III 



Bull. Calif. Acad. Sci., no. I, p. 34, 1884; Arthur, Eesult. Sci. Cong. Bot. 



Vienne, p. 343, 1906. 



The aecial stage is probably Coleosporium Baccharidis Cooke 

 (Grevillea, vol. 9, p. 7, 1880), which produces galls often of large size 

 on the branches of Bacchari-s consanguinea Greene and B. pilularis 

 DC, similar to those of the bark-inhabiting species of Peridermium. 



