UREDINEI. 



[ 662 ] 



UREDINEI. 



represents a vertical section through an im- 

 mature sorus of this; fig. 783 some of the 



Fig. 783. 



Ripe stylospores of the same, germinating. 

 Magnified 46o diameters. 



stylospores detached and germinating; the 

 outer spinulose coat is here fully developed, 



Fig. 785. 



Deformed stylospores, with the spinulose coat developed. 

 Magnified 460 diameters. 



and the tubular filaments are seen emerging 

 from the pores. The spores of the perfect 

 fruits of this genus difi'er from those of 

 Phragmidium in being only bilocular, or, by 

 abortion, unilocular (see Puccinia). 



In iEciDiuM, Cystopus, and some other 

 genera, only spermogonia and stylosporous 

 fruits ( Uredo-fruits, Tulasne) have been ob- 

 served. In Cronartium, spermogonia are 

 unknown, but the Uredo-fra.it exists. In 

 Podisoma both spermogonia and Uredo-fruits 

 are unknown ; in both of these genera the 

 perfect-fruits are placed on a fleshy columella 

 or ligula. 



We subjoin Tulasne's synopsis of the fa- 

 mily ; but as his generic characters are far 

 too long to transcribe, we can only cite the 

 typical species. 



1. Albuginei (white or pale yellow, hetero- 



sporous) . 



I. Cystopus, Lev. (Type, Uredo Candida, 

 Pers.). 



2. jEcidinei (\^ith a jaeridium, homceospo- 



rous). 



II. CiEOMA, Tul. (Type, Uredo Euony mi, 

 Mart.; U.jnnguis, Duby). 



III. ^ciDiUM, Lk. (Type, ^c. Cichora- 

 cearum. D.C. ; jiE. Tussilaginis, Pers. ; j^. 

 Violarum, D.C). 



IV. RcESTELiA, Rebent, Fr. (T}'pe, JEc. 

 cancellatum, Pers.). j 



V. Peridermium, Lk. (Type, Per. Piwz, " 

 Fries). 



3. Melampsorei (solid, pulvinate, biform). 



VI. Melampsora, Cast. (Type, Uredo 

 populina, Pers.; U. Caprcearum, D.C). 



VII. Coleosporium, Lev. (Type, Uredo 

 Rhitianthacearum, D. C ; U. Campanulce, 



Pers.). 



4. Phragmidiacei (pulverulent, biform, in- 



fuscate ; centre of the family). 



VIII. Phragmidium, Lk. (Types, 

 Phragm. incrassatum, bulbosum, with Uredo 

 Ruborum, D.C; Puccinia Potentillce, Pers., 

 witli U. Potentillarum, D.C). j 



IX. Trtphragmium, Lk. (Type, T. UU | 

 marice, Lk.). >| 



X. Puccinia, Lk. (Type, Puce. Compo- 

 sitarum, Schl., with Ur. suaveolens, Pers. ; 

 P. graminis, Pers., with Ur. linearis. Pers.). 



XI. Uromyces, Lk. (Type, Uredo Fica- 

 rice. Alb. and Schw.). 



XII. PiLEOLARiA, Cast. = Uromyccsl 

 which itself may consist of species of Pucci- 

 nia with spores unilocular by abortion. 



5. Pucciniei (fleshy, ligulate, or tremelliform, 



naked and uniform in the fruits; the 

 largest plants of the family). 



XIII. Podisoma, Lk., Fr. (Type, P. Ju- , 

 niperi communis). | 



XIV. Gymnosporangium, Lk., Nees, 

 Fr. (Type, G. Juniperinum, Fr.). 



6. Cronartiei (peridiate, biform, ligulate ; 



perhaps the most highly organized of 

 all the genera). J 



XV. Cronartium (Type, Cr. asclepia- 

 deum, Fr., wdth Uredo Vincetoxici ; Cr. Pceo- 

 nicB, with Ur. Pceonics, Cast.). 



Genera cancelled by Tulasne : — Uredo, 

 Epitea, Podocystis, Trichobasis, Lecythea, 

 Physonema, Solenodonta. 



Genera of C^omacei referred to Usti- 

 LAGiNEi : Ustilago, Tilletia, Thecaphora. 

 Doubtful Ustilaginei : Protomyces, Poly- 

 cystis, Testictilaria. 



BiBL. Berk. Brit. Flor. ii. pt. 2. art. 

 JEcid., Puce, Uredo, &c., Ann. Nat. Hist. 

 i. p. 264; ser. 2. v. p. 463; Tulasne, Ann. 



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