122 The Scottish Naturalist. 



M. Epilobii (Pers.) (1284, Uredo pustulata). 



M. Vaccinii (A. and S.) (1288, Uredo Vacciniorum 



Pers.) 

 M. Padi (K. and Schm.) (1287, Uredo porphyro- 



genita Kunze). 



C. — Melampsoropsis, secidio- and teleuto-spores known, 

 but not uredo-spores ; not known to occur in Scotland, 

 though M. (Calyptospora) Gocppertiana Kuehn may be 

 looked for on thickened orange-red branches of Vacci- 

 nium Vitis-Ida3a). 



COLEOSPORIUM Lev., teleuto-spores formed of several (usually 

 four) cells standing one above the other, and united to 

 form a compact waxy flat stratum, surrounded by a 

 colourless gelatinous mass ; each cell of the teleuto-spore 

 in germination emits a simple promycelium, which forms 

 on it a single sporidium ; uredo-spores in short rows, 

 forming powdery uncovered heaps ; secidium in a strong 

 peridium, otherwise as in Puccinia. 



A. — Hemicoleosporium, .only uredo and teleuto-spores 

 known. 



C. Euphrasia? (Schum.) ^1299, C. Rhinanthacearum 



Lev.) 

 C. Campanula? (Pers.) (1297). 



C. Sonchi-arvensis (Pers.) (1298 ; 1294, C. Tussilaginis 

 Lev. ; 1295, C. Petasitis Lev.) 



B. — Eucoleosporium, all three forms of spores known. 

 C. Senecionis (Pers.) (1347, Peridermium Pini Chev., 

 and P. acicolum Link on Pinus sylvestris and 

 P. austriaca; 2184, Col. Senecionis Fr. on species 

 of Senecio. 



APPENDIX. 



Uredines of doubtful affinity, only uredo-spores or secidio-spores 

 being yet known in each. 



Uredo. — Each spore produced singly on tip of a basidium. 

 U. Polypodii (Pers.) (1283, U. Filicum Desm.) 

 U. Pirola) (Gmel.) 



CaGOma. — Spores produced in rows ; no peridium, paraphyses 

 may be present or absent. 



C. Orchidis (A. and S.) (1290, Uredo Orchidis Mart). 

 C. Mercurialis-perennis (Pers.) (1289, Uredo confluens 



D.C.) 

 C. Empetri (Pers.) (1291, sub Uredo). 



jEcidium. — Spores in rows, surrounded by a peridium. 

 M. Pedicularis Lib. (1373). 



yE. Compositarum Mart, as regards the host-plants not 

 mentioned above (1366 vars.) 



