1919] Blasdale: Uredinales of California il5 



NYSSOPSORA AKTH. 

 Eesult. Sci. Cong. Bot. Vienne, p. 342, 1906. 

 Telia erumpent; teliospores three-celled by oblique partitions, lat- 

 erally flattened ; walls deeply colored, spinous. 



34. Nyssopsora echinata (Lev.) Arth. Ill 



Ann. Sei. Nat., ser. 3, Bot., vol. 9, p. 247, 1848; Arthur, op. cit. 



On Oenanthe calif ornica Wats., San Francisco, Santa Cruz (Thom- 

 son) ; on Selinum paciftcum Wats., Santa Rosa and Hoopa Valley. 



PERIDERMIUM 



Under this form genus are grouped those aecial forms for which 

 no other stages are known and which resemble the aecia of Coleo- 

 sporium and CronarUum. 



35. Peridermium californicum Arth. and Kern 

 Mucologia, vol. 6, p. 118, 1914. 



On Pinns radiaia Don., Monterey (Bethel). This is believed to be 

 the aecial stage of Coleosporium Madiae by Meinicke, but the data 

 upon which this conclusion is based has not yet been published. 



36. Peridermium Ephedras Cooke 



Indian Forester, vol. 3, p. 95, 1877; Arthur and Kern, Bull. Torr. Club, 

 vol. 33, p. 420, 1906. 



On Ephedra calif ornica Wats., San Diego (Bethel), Riverside 

 County (Parish). Conspicuous on account of its large, orange colored 

 spore masses; see Standley (Plant World, vol. 13, p. 61, 1909). 



PHRAGMIDIUM likk. 

 Ges. nat. Freunde, Berlin, vol. 7, p. 30, 1915. 

 Aecia erumpent, usually indefinite and surrounded by paraphyses. 

 Aeciospores in chains, globoid, with colorless walls. Uredinia erum- 

 pent, usually with paraphyses ; urediniospores borne singly on pedicles. 

 Telia erumpent, usually definite and without paraphyses; teliospores 

 two-celled or more by transverse septa with two or more lateral pores. 



37. Phragmidium Andersoni Shear. I, II, III 



Bull. Torr. Club, vol. 29, p. 453, 1902. 

 Qn Potentilla fruticosa L., Mount Eddy, Siskiyou County (Cope- 

 land). 



