262 NORTH AMERICAN FLORA [Volume 7 



inner wall thinner, 3-4 /z, striate and moderately verrucose ; aeciospores globoid or broadly 

 ellipsoid, 14-23 by 16-26/*; wall colorless or pale-yellow, about 1.5 ix thick, very minutely 

 verrucose. 



II. Uredinia chiefly hypophyllous, scattered, roundish, small, 0.1-0.2 mm. across, 

 rather tardily naked, pulverulent, cinnamon-brown, ruptured epidermis evident ; uredinio- 

 spores broadly ellipsoid or subglobose, 15-21 by 19-27 n ; wall pale cinnamon -brown, rather 

 thin, 1-1.5 Mi minutely and sparsely echinulate, the pores minute, 3, equatorial. 



III. Telia chiefly hypophyllous, scattered, roundish or angular, 0.3-0.8 mm. across, 

 sometimes confluent, rather tardily naked, pulvinate, blackish-brown, ruptured epidermis 

 conspicuous ; teliospores ellipsoid, obovate or oblong, 12-18 by 16-32 ju, obtuse or rounded 

 at the apex, obtuse or narrowed at the base; wall chestnut-brown, rather thin, 1-1.5 /x, 

 much thicker at the apex, 7-10 ju, smooth; pedicel tinted, firm, about length of spore. 



On Hypericaceae : 



Ascyrum hypericoides Iv. {^A. Crux-Andreae L. 1763), Mississippi. 



Hypericum Ascyron L. {H. pyramidatum Ait.), Iowa, Minnesota, Missouri, Wisconsin. 

 Hypericum aureum Bart. {H . frondosum Michx.), North Carolina. 

 Hypericum boreale (Britton) Bickn., Maine, Pennsylvania. 

 Hypericum canadensc L. {H. canadense minimum Choisy), Maine, Wisconsin. 

 Hypericum- ellipiicum. Hook., New York. 

 Hypericum, Kalm-ianum. Iv, Illinois; Ontario. 



Hypericum Ttiajus (A. Gray) Britton {^H. canadense m,ajus A. Gray) , Kansas, Maine, Massa- 

 chusetts, Vermont. 

 Hypericum- m-uiilum^ L. {Ascyrum. Crux-Andreae X,. 1753), Alabama, Connecticut, Dela- 

 ware, District of Columbia, Illinois, Indiana, Iowa, Maine, Massachusetts, Mississippi, 

 New York, North Carolina, Ohio, South Carolina, Vermont, Virginia, West Virginia ; 

 Veracruz. 

 Hypericum, opacum T. & G., Florida. 

 Hypericum perforatum L., Maine, New York. 

 Hypericum proliJicum'Li.y W^sty\rgm\d.\ Ontario. 

 Hypericum. punciaium. Lam. {H. corymbosum. Muhl., H. m.aculatum. Walt.), Connecticut, 



Massachusetts, Missouri, New York, Wisconsin. 

 Hypericum- subm-onlanu-m Rose, Hidalgo. 



Triadenum virginicum, (L.) Raf. {^Hypericum, virginicum. I^., Elodea virginica Nutt., E. 

 campanulata Pursh), Alabama, Florida, (Jeorgia, Illinois, Indiana, Iowa, Maine, Mas- 

 sachusetts, Michigan, Missouri, New Jersey, New York, Wisconsin ; Nova Scotia, 

 Ontario, Quebec. 

 Triadenum peliolatum (Walt.) Britton {Elodea petiolata Pursh, Hypericum peiiolaium 

 Walt.), Illinois, Missouri. 

 Type locality : Narrows of Yadkin, North Carolina, on Hypericum, frondosum. 

 Distribution : Nova Scotia to Minnesota, and southward to Florida, Mississippi, and southern 

 Mexico ; also in South America. 



ExsiccATi : Ellis, N. Am. Fungi 231a, b; Ellis & Ev. N. Am. Fungi 2209, 2994; Ellis & Ev. 

 Fungi Columb. 479 ; Barth. Fungi Columb. 3093 ; Shear, N. Y. Fungi 78; Seym. & Earle, Econ. 

 Fungi 265a, b; Sydow, Ured. 1156, 1157 ; Rav. Fungi Am. 794, 795 ; Rab.-Wint. Fungi ^yxr.3308, 



72. Nigredo plumbaria (Peck) Arth. Result. Sci. Congr. 



Bot. Vienne 344. 1906. 



Uromyces plumb arius Peck, Bot. Gaz. 4: 127. 1879. 

 Aecidium gaurinum- Peck, Bot. Gaz. 4: 218. 1879. 

 Trichobasis gaurina Peck, Bot. Gaz. 4: 218. 1879. 

 Uromyces Oenolherae Burrill, Bot. Gaz. 9: 187. 1884. 

 Uredo gaurina De-Toni, in Sacc. Syll. Fung. 7: 848. 1888. 

 Uromyces gaurinus Snyder, Proc. Ind. Acad. Sci. 1896: 222. 1897. 

 Caeomurus Oenolherae Kuntze, Rev. Gen. 3^: 450. 1898. 

 Caeomurus plumbarius Kuntze, Rev. Gen. 3^ : 450. 1898. 

 Caeomurus gaurinus Arth. Proc. Ind. Acad. Sci. 1898: 180. 1899. 

 Uromyces Fremontii Sydow, Ann. Myc. 4 : 29. 1906. 



0. Pycnia chiefly hj'pophyllous, rather few, loosely scattered, punctiform, honey- 

 yellow becoming brownish, flatten ed-globoid, 128-144/* in diameter by 82-112/1 high. 



1. Aecia chiefly hypophyllous, numerous, rather evenly and thickly effused over large 

 areas, often occupying all of the under surface of a leaf, cupulate, short, 0.2-0.4 mm. in 

 diameter; peridium whitish, the margin spreading or somewhat recurved, irregularly 

 lacerate; peridial cells rhomboidal, 12-16 by 20-24 ju, the outer wall rather thick, 6-7 /t, 

 striate, the inner wall thinner, 3-4 /t, moderately verrucose ; aeciospores globoid, 12-16 by 

 14-18 /x; wall colorless, thin, 1-1.5 ju, finely verrucose, 



II. Uredinia amphigenous, scattered, roundish, about 0.4-0.7 mm. across, rather early 

 naked, pulverulent, dark cinnamon-brown, ruptured epidermis noticeable; urediniospores 



