mVERTEBRATA, CRYPTOOAMIA, MICROSCOPY, ETC. 993 



The question has been hitherto in debate whether Phragmidlum 

 Las an ajciclio-form. Fuckel states distinctly that no fecidio-form is 

 kno\vn, but spermogonia ; while Schroter describes the secidio- 

 frnctification as similar to the uredospores ; but without paraphyses. 

 The author considers it possible, from his observations, that Cceoma 

 miniatum and its allies, which are found abundantly on Buhus and 

 other rosaceous genera, are the hitherto undiscovered aecidio-form of 

 Phraginidium. 



The a3cidio-form of both species of Puccinia which are parasitic 

 on Caltlia are now known, and are developed on the same hosts. The 

 following is their diagnosis : — Puccinia Caltlice Link. iEcidium 

 maculas in foliorum pagina sujieriore luteas, dein fuseas, irregulariter 

 rotundas vel elongatas, interdum confluentcs, in pagina inferioro 

 tuborculatas, 1-5 mm. longas formans. Ad petiolura calla elongata, 

 ca. G mm. Lmga adsunt. Pscudoperidia irregulariter vel rarius 

 concentrice disposita, patellajformia, parum emersa, marginc lato 

 revoluto multum inciso albcscente praidita. Pseudoperidiorum cellulfe 

 polygoniaa rotundatai v. clongatfe, hyalinae, niembrana crassa, verru- 

 cosa, 22-35 /x diam. usque 45 rarius 60/ilongfe. Sporfe subrotundse, 

 plenimque polygonige, aurantiaca3, verruculosa3, 22-30 /x diam. — Puc- 

 cinia Zopfii Winter. iEcidium ab antecedente margine pseudo- 

 peridiorum parum iuciso, laciniis latis ca. 4-5 prasdito ; ad pctiolum 

 calla usque 15 mm. longa, sfepc confluentia adsunt. 



The author also records the detection of the aecidinm on Mul- 

 gedium alinnum which belongs to Puccinia PrenantJiis, and of a 

 Puccinia on Senecio cordatus apparently identical with the P. con- 

 gJomeraia on Homogyne alpina. 



The same paper contains also other interesting observations on 

 particular species belonging to this group. 



Uredo viticida.* — For about the last ten years the vineyards of 

 Yonno have been devastated by a disease, somewhat similar to that 

 produced by the oidium, which as completely destroys tho grape as 

 docs the phylloxera ; but tho distribution of the disease is much more 

 limited. M. Daille has examined all the parts of the plant attacked, 

 and establishes as tho cause of the disease a fungus, Urcdo viticida, 

 mainly distinguished from oidium by its spherical spores, and 

 possessing a great similarity to the mildew of cereal crops. 



Development of the Spermogonia of .fficidiomycetes-t— An ex- 

 amination by E. Iviithay of the spermogonia of a considerable number 

 of TEcidiomycetes — Puccinia Anemones, ohtcgens, Falcariir, Tragopo- 

 gonis, graminis, straminifi, and comnata, Gymnnspnrangium fuscum, 

 conicu7n, and clavaria^fnrtnc, Uromyccs acutellatiis, and JEcidium Magcl- 

 haenicum and CIcmatiilis — shows that in almost all cases they contain 

 a larger or smaller quantity of a substance which has tho property of 



• • Journ. Pliarm, ct Cliiin.,' ii. (1880) p. 32. Seo ' Bot. Coiitralbl.,' i. (1880) 

 p. 712. 



t *Vorpel. k. Aknd. Wiss. Wien ; Sitz. mftth.-nnturw. CI..' June 10, mso. 

 Bee * Bot. Centralhl.,' i. (1S«0) p. flfil. 



