110 University of California Piihlication^ in Botany [^ol. 7 



TJredinia and telia occur on tlic leaves of the same hosts, but as the 

 sori are small they are easily overlooked. The genetic connection 

 between the two forms has not been proven; but the frequency with 

 which they are associated makes it probable that they are so related. 

 It is common tliroujjrliout the bay region and in southern California. 



17. Eriosporangiumpunctato-striatum (Dietel and Neger) Arthur 



Bot. Jahrb., vol. 22, p. 357, 1896; N. A. Flora, vol. 7, p. 213, 1912. 



Aecia on stems and leaves on Baccharis viminea DC, but does not 

 produce conspicuous galls. 



Uredinia and telia on the same host (type of Fuccinia BaccJiaridis 

 Diet, and Holway), Santa Rosa, Los Gatos, Pasadena (McClatchie), 

 San Bernardino (Parish), Paso Eobles (Bethel), San Ysidro (Bar- 

 tholomew), Lakeside (Bethel). 



GYMNOSPORANGIUM hedw. 

 Flora frangaise, vol. 2, p. 216, 1805. 



Aecia usually cylindrical but rarely cupulate ; peridia membranous, 

 the cells imbricate. Uredinia with one exception lacking. Telia 

 naked, gelatinous, and somewhat elastic when mature ; teliospores two- 

 celled, sometimes three- to five-celled, by transverse septa, pedicels 

 hyaline, usually long. 



18. Gymnosporangium Blasdaleanum (Diet, and Holw.) Kern 

 I, III 



Erythea, vol. 3, p. 77, 1895; Kern, Bull. N. Y. Bot. Gard., vol. 7, p. 437, 

 1911. 



Aecia on Amelanchier alnifolia Nutt. and Crategus rivularis Nutt., 

 Sisson and Shasta Springs, type collection; on Amelanchier alnifolia 

 Nutt., Hoopa Valley, Plumas County (Meinicke), Yosemite Valley 

 and Lake Tahoe (Bethel), on Amelanchier pallida Greene and Cra- 

 tegus Doiujlasii Lindl., northern California (Kern.). This has the 

 well developed peridium of a typical aecidium. 



Telia on Lihocedrus decurrens Torr. Sisson, Hoopa Valley, Sis- 

 kiyou County (Copeland), Potter Vallej^ (Purpus), Yosemite Valley 

 and Lake Tahoe (Bethel) ; "widely distributed throughout the north- 

 ern part of the state" (Meinicke). It sometimes produces witches' 

 brooms of some size, but the spore masses, which appear as brown 

 cushions on the smaller twigs and leaves, are not conspicuous. 



