24 NORTH AMERICAN FLORA [Voi.X7ME 7 



On Polygonaceae : 



Polygonum. Newberryi^ Washington. 



Type collected on Polygonum Newberryi, Mt. Paddo, Washington, at an altitude of about 

 2200 m., by W. N. Suksdorf, September, 1904. Its distinguisbing character is the punctate-reticu- 

 lations of the spores that require very high powers for their detection. 



72. Ustilago Bistortarum (DC.) Korn. Hedwigia 16 : 38. 1877. 



Uredo Bistortarum DC. Fl. Fr. 6 : 76. 1815. 

 Uredo Bistortarum pustulata DC. Fl. Fr. 6 : 76. 1815. 

 Uredo Bistortarum. marginalis DC. Fl. Fr. 6 : 76. 1815. 

 Tilletia bullaia Fuckel, Symb. Myc. 40. 1869. 



Sori in leaves, either in pustules 2-5 mm. in diameter scattered over the surface or in 

 a continuous line closely following the margin, purplish, rupturing usually only on one side 

 of leaf ; spores light- to dark-purple, ovoid or ovate to usually chiefly subspherical or spher- 

 ical, occasionally somewhat angled or irregularly elongate, thick-walled, granular to 

 minutely verruculose, chiefly 13-17 /z, the most elongate rarely 19 /i or even 22 A, in length. 



On Polygonaceae : 



Bistorta bistortoides {Polygonum bistortoides) , Washington. 



Bistorta vivipara {^Polygonum, viviparum.) , Colorado, Wyoming; Alaska; Greenland. 

 Type locality : Alps and Pyrenees, Burope, on Polygonum Bistorta {Bistorta major"). 

 Distribution : Colorado to Alaska and Greenland; also in Europe. 



Illustrations : E. & P. Nat. Pfl. li** : 11, /. 7 E; Brefeld, Unters. Gesammt. Myk. 12 : pi. 8, 

 f. 31-34. 



Exsiccati : Rab.-Wint. Fungi Eur. 3502. 



Ustilago Bistortarum inflorescentiae Trel. Harriman Alaska Exp. Crypt, Bot. 35. 1904. Sori in 

 the flowers, infecting all, enwrapped by floral envelopes, forming a dusty dark -purple spore-mass ; 

 :spores chiefly dark-purple when mature, rather irregular, ovoid to spherical, often angled or some- 

 Tvhat flattened, often apparently smooth but minutely granular verruculose, chiefly 10-14 /x, the 

 most elongate rarely even 17 j^, in length. On Polygonaceae: Bistorta vivipara {Polygonum 

 -viviparum), Wyom.m^\ Alaska; Greenland. ExsicCati: Griff. West Am. Fungi 22i. 



Rostrup reported this variety from Greenland and Griffiths from Wyoming as Sphacelotheca 

 Hydropiperis. It has close resemblance to that species. 



Doubtful and excluded species 



Sporophaga cyanea (Ces.) Hark. Proc. Calif. Acad. Sci. III. Bot. 1: 281. 1899. 

 (^Ustilago cyanea Ces.; Hark. loc. cit, as a synonym.) = ? Chytridinales. 



Ustilago Arenariae Ellis & Bv. Bull. Torrey Club 22 : 362. 1895. On Arenaria con- 



gesta. Extraneous spores. 



Ustilago Ficuum Reichardt, Verb. Zool.-Bot. Ges. Wien 17: 335. 1867. On market 

 figs, Ficus Carica. ^:= Sterigmatocystis. 



Ustilago FischeriV^.^^. Bull. Agr. Com. Parm. N 1877. OnZeaMays. =Sterigma- 



tocystis. 



Ustilago flavo-nigrescens B. & C. Jour. Linn. Soc. 10: 358. 1868. On Scleria sp. 



Sclerotium of Ustilaginoidea. 



Ustilago Gynerii Vize, Grevillea 5: 110. 1877. On Gynerium argenteum. —Gym- 



nosporium. 



Ustilago Osmundae Peck, Bot. Gaz. 6: 276. 1881. On Osmunda regalis . ? Hypho- 



mycete. 



Ustilago Phoenicis Corda, Ic. Fung. 4: 9. 1840. On market dates. Phoenix dac- 



ty lifer a. = Sterigmatocystis . 



Ustilago strumosa Cooke, Grevillea 9 : 98. 1881. On Chusquea abietifolia. Sclero- 

 tium of Ustilaginoidea. 



Ustilago viridis Ellis & Ev. Jour. Myc. 3: 56. 1887. On Setaria sp. Sclerotium 



qi Ustilaginoidea. 



2. SPHACELOTHECA DeBary, Verg. Morph. Biol. Pilze 187. 1884. 



Sporisorium Khrenb. ; Link, in Willd. Sp. PI. 6^ : 86. 1825. 

 EndoihlaspisSor. Rev. Myc. 12: 4, 1890. 



Sori usually in the inflorescence, often limited to the ovaries, provided with a definite 

 (more or less temporary) false membrane covering a dusty spore-mass and a central colu- 

 mella (usually chiefly of plant tissues) ; false membrane composed largely or entirely of 

 definite sterile fungous cells which are hyaline or slightly tinted, oblong to spherical, and 

 usually mors or less firmly bound together; spores single, usually reddish-brown, de- 



