1919] Blasdale: TJredhmles of Calif orrda 141 



383. Uredinopsis Copelandii Sydow. I, II, III 



Ann. Mycologici, vol. 2, p. 34, 1904. 



Aecia not definitely reported from California, but elsewhere on 

 species of Abies. 



Uredinia and telia on Athyrium cyclosorum Kupr., Sisson (Cope- 

 land). 



184. Uredinopsis Pteridis Diet, and Holw. I, II, III 



Ber. d. deut. bot. GeselL, Bd. 13, p. 331, 1895. 



Aecia {Peridermium pseudo-halsameum Arthur and Kern) on 

 AMes grandis Lindl., Eureka. Reported by Hedgcock (Mycologia, 

 vol. 4, p. 141, 1912) on A. lasiocarpa Nutt., and A. nohilis Lindl. 



Uredinia and telia on Pteris aquilinum piibescens Underwood. 

 Sisson , Lake Tahoe, San Francisco, Mount Tamalpais, Pasadena 

 (McClatchie), Long Beach (Bethel). For culture experiments relat- 

 ing to this form see "Weir and Hubert (Am. Jour. Bot., vol. 4, p. 328, 

 1917). 



UEEDO 



Under this form genus are grouped the uredinial stages of certain 

 species for which the mature stages are unknown. 



185. Uredo Acaenae Ell. and Ev. 



N. A. Fungi, no. 3150, 1894. 

 On Acae'n-a tridactyla PresL, frequent in the bay region. Arthur 

 (N. A. Flora, vol. 7, p. 174) takes this to be uredinia of Phragmidium 

 Ivesiae Sydow. 



186. Uredo Gaillardiae Diet, and Holw. 



Erythea, vol. 7, p. 98, 1899. 

 On Gaillardia aristata Pursh, Dunsmuir (Holway). 



187. Uredo Nicotianae Arthur, sp. nov. 



Uredinia mostly hypophyllus, scattered upon discolored areas 1 to 

 1.5 cm. across, round, 0.2 to 0.5 mm. in diameter, early naked, applan- 

 ate, subepidermal, pulverulent, pale cinnamon to whitish, ruptured 

 epidermis evident ; urediniospores globoid to broadly ellipsoid, 23 to 

 26/x by 24 to 32/a; wall colorless, 1.5 to 5/* thick, closely and coarsely 

 verrucose, the pores obscure.* Collected in small amount at Rionido 

 on Nicotiana Bigelowii "Wats. The spores resemble those of a Coleo- 

 sporium, although not in well defined chains. 



This description furnished by Professor J. C. Arthur. 



