.'!42 MELAMPSOB A 



4. Melampsora Ribesii-viminalis Kleb. 



Curm/Ki /u'/ifsii Link, Sp. PL ii. i! s p.p. 



Melampsora Ribesii-viminalis Kleb. in Pringsh. Jahrb. f. Wissenscn. 

 Bot. L900, w\iv. 363. Fischer, lied. Schweiz, p. 194. 



Spermogunes. Pulvinate, with flat hymenium. 



JEcidiospores. Caeomata hypophyllous, on discoloured spots 

 which show on both sides, arranged in groups, 15 una. wide, 

 bright-orange; spores roundish, rarely oval, 18 — 23 x 14 — 17 p.; 

 epispore 2 — 4 ll thick, with many thinner places (? germ-pores), 

 finely and densely verruculose. 



Uredospores. Sori hypophyllous, minute, about \ mm., 

 scattered or in groups, pale orange-yellow ; spores more or less 

 round, 15 — 19x14 — 16 p,\ epispore 2/x thick, uniformly echinu- 

 late ; paraphyses capitate or more often clavate, hardly thick- 

 ened above, 50 — 70 x 18—25 fi. 



Teleutospores. Sori epiphyllous, developed between the 

 cuticle and the epidermis, \ — £ mm., scattered or in groups 

 over the whole leaf, dark-brown, shining ; spores prismatic, 

 rounded at both ends, more or less irregular, 25 — 40 x 7 — 14 /x ; 

 epispore thin, clear-brown, not thickened above, with no evident 

 germ-pore. 



Cseomata on Ribes Grossidaria, R. nigrum, R. rubrum ; 

 uredo- and teleutospores on Salix viminalis. 



Klebahn showed, by many trials, the genetic connection of the parasites 

 on these species. The teleutospores can be distinguished from all others 

 except those of M. Larici-Caprearum and J/. Allii-Galanthi-fragilis by 

 their being subcuticular. M. Larici-epitea is also recorded for Salix 

 viminalis, but that has its teleutospores subepidermal, and the paraphyses 

 of the uredo-sori strongly thickened at the apex. The cseoma on Ribes 

 does not seem to be recorded for this country and is apparently rare. 



5. Melampsora Ribesii-purpureae Kleb. 



Melampsora Ribesii-purpureae Kleb. in Pringsh. Jahrb. f. Wissensch. 

 Bot. 1901, xxxv. 667. Fischer, Ured. Schweiz, p. 4 ( .t± 



Spe7"mogones. Subcorneal, with flat hymenium. 



j-Ecidiospores. Cseomata mostly hypophyllous, on pale-yellow 

 spots which show on both sides, scattered or in subcircinate 

 groups, ^ — 1^ mm., sometimes confluent, surrounded by the 



