Uredine» inferioros, Peridermium. 835 



PERIDERMIUM Lev. in Mera. Soc. Linn. de Paris 1826, IV, p. 212 

 (Etym. peri circa et clerrna cutis) ThiimeQ Die Blasenrost Pilzo 

 der Coniferen in Mittheil. forstl. Versuchsw. (Esterr. IL heft, III, 

 Wien 1880. — Pseudoperidia corticola, conigena v. foliicola, erum- 

 pentia, liberata, saccata vel tubuliforraia, vertice lacerato dehiscen- 

 tia; sporse (aecidiosporae) varie cateuulat^e sed cito (post maturita- 

 tem) solitarie deciduas, gIobosa3 v. elliptica3 v. oblongo-polyhedri- 

 c», aurantiaco-rufescentes, episporio seraper plus minus regulari- 

 ter verrucoso-reticulato ; spermogonia (an semper?) truncato-co- 

 noidea. — Species vigentes in Coniferis. 



1. Peridermium piriforme Peck in BulL Torrey bot. Club vol. VI, 20So 

 1875, p. 13, Thiim. Mouogr. pag. 311. — Pseudoperidiis magnis, 

 usque 2,5 cm. diara., erumpentibus, gregariis et plerumque con- 

 fluentibus, cuticula irregulaciter lacerata, merabranacea, pallida te- 

 ctis, deraum liberis, pulverulentis, pallide flavo-aurantiacis, appla- 

 nato-corapressis, cellulis contextus radiato-striatis ; aecidiosporis ob- 

 ovatis, piriformibus vel ovoideo-oblongis, vertice dilatato-rotunda- 



tis, basi angustato-acutatis, 38-55 a. diam., episporio crasso, mi- 

 nute denseque verruculoso, pallide luteis. 



Hab. in ramulis vivis Pini cujusdam, ia Georgia Americce bo- 

 realis (J. B. Ellis). 



2. Peridermium coruscans Fr. Summa Veget. Scand. p. 510, JEci- 2981 

 dmra coruscans Fr. in Phys. Sallsk. Arb. 1824, pag. 92, Reess 

 Rostp. deutsch. Conif. p. 52. — Pseudoperidiis numerosis, seraper 

 fere longitudinaliter dispositis, prirao clausis, ellipsoideis, dein raem- 

 branaceis, elongatis, albidis, tubulosis, vertice divaricatis, pallide 

 rubris; secidiosporis plerumque globosis, subglobulosis v. subelli- 

 psoideis, regularibus, flavido-aureis, 30-35 - 20-24, episporio tenui, 

 obsolete at dense verruculoso donatis. 



Hab. in foliis vivis Abietis excelsae, in Gerraania, Suecia 

 et Feunia. — Cfr. Bot. Zeit. 1879, p. 806, 



3. Peridermium Ephedrse Cooke in Indian Forester III, part. 2, Thum. 2982 

 Monogr. p. 323, Peridei^mmm Pini var-. minor Berk. et Curt. 



in Grevillea III, p. 39. — Pseudoperidiis densissirae gregariis, nu- 

 merosis, sine ordine dispositis, ssepe confluentibus, elongatis, plus 

 minus utriculi-vel tubuliformibus, alutaceis (in sicco), vertice ir- 

 regulariter crenulato rurapentibus; aicidiosporis globosis vel ple- 

 rumque anguste ellipticis vel ovoideo-ellipticis, utrinque rotunda- 

 tis, nuraquara acutatis, hyalinis (in sicco) 20-2 4^:16-20, episporio 

 subtenui dense verruculoso donatis. 



