340 



MELAMPSORA 



pores 



paraphyses capitate with a slender pedicel, thickened 

 (up to 8 p) above, 50—70 x 18—25 p. 



Tr/cutusjxires. Sori hypophyllous, 

 covered liy the epidermis, small, about 

 h mm, diam., but united into groups 

 bounded by the veins, brown with a 

 tinge of bluish-grey ; spots brown on the 

 upper surface; spores irregularly pris- 

 matic, rounded at both ends, 25 — 40 

 x 7— 13 p, ; epispore thin, clear-brown, 

 scarcely thickened above, with a barely 

 perceptible apical germ-pore. 



Cseomata on Euonymus europaeus, 

 August, September, rather rare; uredo- 

 and teleutospores on Salve aurita, S. 

 Caprea, S. cinerea. (Fig. 256.) 



Fig. 256. M. Euonymi- 

 < 'aprearum. Old dead 

 leaf of ,S'. Caprea, show- 

 ing teleuto-sori on lower 

 face (slightly reduced). 



Fischer records the cseoma in Switzerland in May and June. The 

 distinction of this species from the preceding one (apart from the secidial 

 host) lies in the teleuto-sori ; these are hypophyllous and subepidermal, 

 while those of M. Larici-Caprearurn are epiphyllous and subcuticular. It 

 is not certain, however, that this distinction is absolute ; Fischer in a 

 culture on S. cinerea obtained a few teleuto-sori showing also the latter 

 characters. There is a further difference in the form of the teleutospores. 



3. Melampsora Larici-epitea Kleb. (emend. Fischer). 



Uredo epitea K. et S. Mycol. Heft. i. 68. 

 Lecythea epitea Lev. ; Cooke, Micr. Fung. p. 221. 

 Melampsora epitea Thiim. ; Plowr. Cred. p. 239. 



M. Larici-epitea Fischer, Ured. Schweiz, p. 485, f. 313. Kleb. in 

 Zeitschr. f. Pflanzenkr. 1899, ix. 88. 



jEcidiospores. Cseomata hypophyllous, scattered or in rows, 

 with yellow spots on the upper surface, roundish or oblong, 

 | — 1^ mm. long, pale orange-yellow ; spores roundish or some- 

 what polygonal, finely warted, 15 — 25x10 — 21 p,: epispore 

 H — 3,11 thick, with no recognisable germ-pores. 



Uredospores. Sori amphigenous, seated on yellow spots, 

 orange-yellow, | — l|mm. diam.; spores mostly oval, sometimes 

 oblong, roundish, or angular, echinulate, orange, 12 — 25 x 9 — 



