Oct. 1903] Index to North American Mycology 
193 
Porodiscus, see Polyporaceae of North America. — V. The 
Genera. 
Porodiscus Murrill n. gen. [Polyporus pocula (Schw.) B. & 
C., the type.] Bull. Torr. Bot. Club, 30:432. Aug. 1903. 
Porodiscus pendula (Schw.) Murrill n. n. [Peziza pendula 
Schw., Cyphella pendula Fr., Sphaeria pocula Schw., Ens- 
linia pocula Fr., Polyporus pocula B. & C., Polyporus cupul- 
aeformis B. & C.] Bull. Torr. Bot. Club, 30:433. Aug~ 
1903. 
Potentilla canadensis, host to Phragmidium potentillae-cana- 
densis Diet. n. sp. Beiblatt zur Hedwigia, 42: (179). 4 
July 1903. 
Pseudopeziza singularia Peck in litt. [Peziza singularia Peck.] 
Trans. Wise. Acad. Sci. Arts Let. 14:94. 1903. 
Psidium pomiferum, host to Gloeosporium psidii G. Del. n. spt. 
Bull. Soc. Mvc. France. 19:145. 30 April 1903. 
Puccinia antirrhini Diet. & Holw., occurring on Antirrhinum 
majus and A. vagans, also Linaria reticulata and L. ame- 
thystina. [Blasdale.] Jour. Mycol. 9:81-2. May 1903.. 
Puccinis bupleuri Berk. Grev. 1874, syn. of Puccinia osmorrhiza a? 
q. v. 
Puccinia chaerophylli Transzsch. F. Ross. 217, syn. of Puccinia 
osmorrhisae q. v. 
Puccinia claytoniata (Schw.) Syd. n .n. [Caeoma (Aecidium) 
claytoniatum Schw., Puccinia mariae-wilsoni Clint.] Mon- 
ogr. Uredin. 11561. 15 May 1903. 
Puccinia congregata Hark., syn. of Puccinia heucherae (Schw.) 
Diet. [Sec. Syd.] Monogr. Uredin. 1:498. 15 May 1903. 
Puccinia coulterophyta Diet. & Holw., syn. of Puccinia prion ~ 
osciadii q. v. 
Puccinia euphorbiae intumescens Syd. n. var., in foliis vivis 
Euphorbiae calyculatae. Monogr. Uredin. 1:457. 15 May 
1903. 
Puccinia franserae Syd. n. sp., in foliis vivis Franserae ambrosL 
oidis. Ann. Mycolog. 1:326. July 1903. 
Puccinia gemella Diet, et Holw. n. sp., in foliis Calthae lepto- 
sepalae. Monogr. Uredin. 1:54i. 15 May 1903. 
Puccinia hibisciata (Schw.) Kellerman n. n. [Aecidium 
hibisciatum Schw., Puccinia windsoriae Burr, non Schw., 
Puccinia muhlenbergiae Arth.] Jour. Mycol. 9:110. May 
1903. 
