64 BULLETIN UNIVERSITY OF MONTANA 



Pucciniastrum Pyrolae (Pers.) Diet. On Pyrola secunda at Yellow Bay. 

 Also on Pyrola on Swan river by Bonser. 



Pyrenophora fenestrata Peck. On Dead stems of Astragalus Bourgovii, 

 MacDougal Peak. 



Rhytisma Arbuti Phill. On Menziesia glabella at Hall's Peak, Bonser. 

 Also by Jones on same host at MacDougal Peak and Bigfork. 

 Roestelia tubulata Kern n. sp. 



Pycniis epiphyllis, numerosls, in greges irregulares dense confertis, maculis 

 decoloratis insidentibus, cylindraceis. 2-3.5 mm. altis, 0-0.4 mm. diam., apice 

 persistentes cohaerentibus; peridio firmo; cellulis peridiis fusoiaeo-oblongis, 

 17-25 m X 48-80 m, rugoso; aeciosporis globosis vel subglobosis, 18-2i2 m x 

 21-28 m; episporio castaneo-brunneo, 1.5-2.5 m. crasso, subtiliter verruculoso; 

 poris germinantionis 6-8, sine ordine dispersis. 



Habitat in foliis Crataegi Douglasii Lindley. Poison prope Flathead Lake 

 in Montana Americae bor. 840 m. alt. Aug. 19 1908. Coll. Marcus E. Jones. 



This species is characterized by its firm tube-like peridium which does 

 not rupture at the apex but by longitudinal slits in the lower part. In its 

 firmness and in its tendency to maintain its tubular form without becoming 

 lacerate above it has a resemblance to Roestelia oornuta (Pers.) Fries on 

 Sorbus. It differs from that species, however, in its more slender peridia, 

 and in the size and surface-marking of the peridial cells. The peridial cells 

 have a considerable resemblance to those of Roestelia globosa Pari, but it is 

 very much unlike that species in the size of the peridia and in their manner 

 of rupturing. 



Roestelia Nelson! Arthur. On Amelanchier alnifolia at Bigfork. 



Roestelia tubulata Kern. On Crataegus allied to coccineus at Poison. On 

 Crataegus Douglasii at Bigfork. 



Roestelia cornuta Ellis. On Pyrus "Sitchensis" at Hall's Peak. 



Septoria saccharina var. occidentalis E. &. E. On Acer glabrum at Yel- 

 low Bay, Bigfork and MacDougal Peak. 



Septoria sorbi Lasch. On Pyrus sambucifolia at Yellow Bay and Bigfork. 

 On P. "Americana" at MacDougal Peak, alpine. 



Septoria salicifoliae. On Spiraea at Bigfork by Bonser. 



Septoria Streptopidis Peck n. sp. Maculae subangulares, 2-8 mm. 

 (x 1-4 mm.) latae saepe confluentes flavidae, brunneae vel rubrobunneae; per- 

 ithecia amphigena, membranacea, inaequalia, atra, in macula quavis unum 

 multave; sporae numerosae, elongatae, cylindraceae vel subfiliformes, cur- 

 vatae, plurinucleatae, 30-89 x 4-5 m., ex perithecia exudantes et massam 

 albidam formantes. On living leaves of Streptopus roseus and Prosartes 

 trachycarpa at Yellow Bay, Swan Lake, MacDougal Peak and Bigfork. 



Sphaerella CHimaphiiae (E. & E.). On Chimaphila umbellata at Bigfork 

 by Bonser. 



Sphaerotheca Humuli (DC.) Burr. On Slum cicufaaefolium at Bigfork. 



Triphragmium clavellum. On Aralia at Swan Lake by Bonser. 



Thecaspora deformans Dur. & Mort. On Rubus Idaeus. Whitefish. On 

 Astragalus flexuosus, Browning. 



Uncinula Salicis. On Salix at Flathead Lake by Bonser. 



Uredo confluens Pers. On Salix Scouleriana at Bigfork. 



Uredo Lini Schum. On Linum Lewisii at Wild Horse Islanfl. 



Uredo Medusae (Thum.) Arthur. On Populus tremuloides at Bigfork . 



Uredo Bigelovii (Thum.) Arth. On Vaccinium. Sperry Glacier, Alta. 



Uredo Polypodii DC. On Cystopteris fragilis. Blackfoot Glacier. 



Uromyces albus D. & H. On Vicia Americana at MacDougal Peak. 



Uromyces Aristidae E. &. E. On Plantago Tweedyi in Deer i^odge Valley. 



Uromyces Astragali (Opiz.) .Schroet. On Oxytropis albiflorus at Wild 

 Horse Island. 



Uromyces Erythronii (DC.) Lev. On Erythronium grandiflorum var, 

 minus at MacDougal Peak, alpine. 



