140 University of California Publications in Botany [VOL. 7 



RAVENELIA BERK. 

 Gard. Chron., p. 132, 1853. 



Uredinia erumpent, without peridium ; urediniospores borne singly 

 on pedicels, wall colored. Teliospores fascicled on compound stalks, 

 one- or two-celled, forming heads bordered by hyaline cysts. 



180. Ravenelia arizonica Ell. and Ev. II, III 



Bull. Torr. Club, vol. 22, p. 363, 1895. 

 On Prosopis juliflora (Sw.) DC, San Diego (Bethel). 



181. Ravenelia versatilis (Peck) Diet. II, III 



Hedwigia, vol. 33, p. 368, 1894. 



On Acacia Gregii Gray, San Bernardino (Tourney), Banning 

 (Parish). 



TRANZSCHELIA ARTH. 

 Result. Sci. Cong. Bot. Vienne, p. 340, 1906. 



Aecia cylindrical; aeciospores globoid; wall colored. Uredinia 

 erumpent; urediniospores borne singly on pedicels mixed with para- 

 physes. Telia erumpent, pulverulent; teliospores attached to a com- 

 mon stalk by short inconspicuous pedicels. 



182. Tranzschelia punctata (Pers.) Arth. 0, I, II, III 



Ann. Bot. Usteri, vol. 20, p. 135, 1796; Arthur, op. tit. 



Aecia not known from California but found on various species of 

 Hepatica, Anemone and Thalictrum (Aecidium punctatum Pers.) in 

 the eastern United States. 



Uredinia and more rarely telia on cultivated peach, plum, prune, 

 almond, and apricot, especially in the southern part of the state, but 

 widely distributed. This is the "prune rust" which is sometimes the 

 source of considerable losses to fruit growers. 



UBEDINOPSIS MAGN. 

 Atti Cong. Bot. Geneva, p. 167, 1893. 



Aecia similar to those of Coleosporium, found on leaves of species 

 of Abi-es. Uredinia larger and more conspicuous than the aecia, the 

 agglutinated spores ejected from the delicate peridium in a long 

 mucilaginous filament. Telia indehiscent ; teliospores four-celled, with 

 thin wall. 



