Blasdale: Uredinales of California 113 



26. Kunkelia Rosae-gymnocarpae (Dietel) Arthur 



Hedwigia, vol. 44, p. 334, 1905; Arthur, Bot. Gaz., vol. 42, p. 505, 1917. 

 On Rosa gymnocarpa Nutt., Amador County, type collection (Han- 

 sen), Plumas County (Meinicke), Paso Kobles and Yosemite Valley 

 (Bethel). Very little is known about the life history of this rust, but 

 its similarity to the preceding species makes it probable that it is also 

 a short-cycle form. It appears very early in the spring and produces 

 hypertrophy and ultimate death of the affected shoots. 



MELAMPSORA CAST. 

 Observ., vol. 2, p. 18, 1843. 



Aecia erumpent, peridia and pycnia wanting. Aeciospores globose 

 with colorless walls. Uredinia erumpent, pulverulent, borne singly on 

 pedicels. Telia in waxy layers, indehiscent; teliospores one-celled, 

 prismatic or ellipsoid. 



27. Melampsora albertensis Arthur. 0, I, II, III 



Bull. Torr. Club, vol. 33, p. 517, 1906. 



Aecia not reported from California but found in British Columbia 

 and Colorado on Pseudotsuga mucronata (Raf.) Sudw. (Caeoma 

 occidentalis Arthur). 



Uredinia and telia on Populus tremuloides Michx., Dunsmuir (E. L. 

 Smith) ; on P. trichocarpa T. and G., Yosemite Valley (Bethel). The 

 genetic connection between these forms was established by Arthur 

 (Mycologia, vol. 4, pp. 29, 58, 1912). 



28. Melampsora Bigelowii Thiim. 0, I, II, III 



Mitth. Forsty. Vers. Oest., vol. 2, p. 37, 1879. 



The aecial stage (Caeoma Bigelowii Thum. Arth.) not reported 

 from California but found elsewhere on Larix Lyalii Parl. 



Uredinia and telia on Salix lasiandra Benth. and 8. lasiolepis 

 Benth., Berkeley; on 8. laevigata Bebb and 8. exigiia Nutt., Long 

 Beach (Bethel). Extremely common and widely distributed. 



29. Melampsora Lini (Pers.) Desmaz. 0, I, II, III 



Syn. Fungi, p. 216, 1901; Desmaz, PI. Crypt., fasc. 41, no. 2049, 1850. 

 On Linum micranthum Gray, Sisson; on L. digynum Gray, 

 Amador County (Hansen). Also reported by Arthur (N. A. Flora, 

 vol. 7, p. 102) ; on L. congestum Gray, L. Lewisii Pursh. ; L. Breweri 

 Gray, and L. drymarioides Curran. This species was shown to be 

 autoecious by Arthur (Jour, of Mycol., vol. 13, p. 207, 1907). 



