114 University of California Publications in Botany [VOL. 7 



30. Melampsora occidentalis Jackson. II, III 

 Phytopathology, vol. 7, p. 354, 1917. 



On Populus trichocarpa T. and GL, Siskiyou, Trinity, and Shasta 

 counties (Meinicke) ; on P. Fremontii Wats., San Bernardino (Par- 

 ish). These specimens were formerly referred to Melampsora Medusae 

 Thiim., from which the species named above differs in a number of 

 minor characters. Still another specimen collected by Bethel on 

 Populus alia L. at San Jose, which has also been referred to M. 

 Medusae, has not been satisfactorily named. 



MELAMPSOROPSIS (SCHBOET) ARTHUR 

 Besult. Sci. Cong. Bot. Vienne, p. 338, 1908. 



Aecia erumpent but laterally flattened; peridium firm. Aecio- 

 spores ellipsoid to globoid, walls colorless. Uredinia erumpent, pul- 

 verulent. Telia waxy; teliospores in chains, one-celled, oblong or 

 cuboid, walls colorless. 



31. Melampsoropsis Piperiana Arthur. II 



N. A. Flora, vol. 7, p. 120, 1907. 

 On Rhododendron calif ornicum Hook, Humboldt County. 



32. Melampsoropsis Pyrolae (DC) Arthur. 0, I, II, III 



Fl. franc., vol. 6, p. 99, 1815; Arthur, Eesult. Sci. Cong. Bot. Vienne, 

 p. 338, 1906. 



The aecial stage not reported from California but collected by 

 Hedgcock on Picea. Eng elm-anil Parry. The genetic connection of this 

 species with Peridermium conorum Piceae was shown by Fraser 

 (Mycologia, vol. 4, p. 183, 1912). 



On Pyrola uliginosa Torr., Sisson (Holway). 



NEORAVENELIA LONG 

 Bot. Gaz., vol. 35, p. 131, 1903. 



Aecia erumpent, without peridium ; aeciospores in chains, wall 

 colored. Uredinia erumpent ; urediniospores borne singly on pedicels, 

 wall colored. Telia erumpent; teliospores like those of Ravenelia. 



33. Neoravenelia Holwayi (Dietel) Long. 0, I, II, III 



Hedwigia, vol. 33, p. 61, 1894; Bot. Gaz., vol. 35, p. 131, 1903. 

 On Prosopis juliflora (Sw.) DC, San Bernardino County (Mc- 

 Clatchie). 



