The Scottish Naturalist. 117 



(U. graminum Cooke). M. Cornu also mentions. the occurrence on 

 the same host plant (the common Reed) of Puccinia graminis, 

 said to give rise to JEc. Berberidis on the Barberry, and of P. Mag- 

 nusiana (vide supra) said to cause jEc. Rumicls on species of 

 Rwnex ; P. sessilis, Schum. is also a reed-parasite ; the correspond- 

 ing fungus being JEc. Allii (vide infra). The following is the 

 classification referred to above {Scot. Nat., Oct., 1883, p. 84) in so 

 far as it applies to the Uredines known to us as Scottish : the 

 numbers are those under which they stand in the Mycologia 

 Scotica : — 



UROMYCES Link., teleuto-spo'res unicellular, free, not enclosed 

 in a peridium, ultimately forming a powdery mass. 



A. — Lepturomyces, only teleuto-spores present, which 

 germinate at once ; no examples yet found in Scotland. 



B. — Micruromyces, teleuto-spores alone occur, fall away 

 easily, but do not germinate for some time. 

 U. Ficariae (Schum.) (1272). 

 U. Scillarum (Grev.) (1276, U. concentrica Lev.) 



C. — Hemiuromyces, both uredo-spores and teleuto-spores 

 occur. 



U. Rumicis (Schum.) (1293, Ured. bifrons). 

 U. Alchemillae (Pers.) (1275, U. intrusa Grev.; and 

 p.p. 1 281, Uredo Potentillarum, D.C. 



D. — Uromycopsis, only aecidio- and uredo-spores present. 

 U. Scrophulariae (D.C.) (1274, U. concomitans B. 



and Br. ; 1372, /Ecidium Scrophulariae D.C.) 

 U.' Behenis (D.C.) (2187, JEc. Behenis D.C.) 



E. — Euuromyces, aecidio-, uredo-, and teleuto-spores all 

 present. 



(a) Auteuuromyces, all three spore forms on same host- 

 plant. 



U. Polygoni (Pers.) (1277 and 1222, Puc. vaginalium 



Link.) 

 U. Betas (Pers.) (13 19, Trichobasis Betas Lev.) 

 U. Limonii (D.C.) (2253, Uredo Statices Desm.) 

 U. Valerianae (Schum.) (1310, Lee. Valerianae B.; 1361, 



JEc. Valerianacearum Duby). 

 U. Orobi (Pers.) (p.p. 1266, Tr. Fabae Link.; p.p. 1267, 



Tr. fallens Cooke, 1320, Tr. Fabae Lev. ; and 1365, 



-^Ec. Orobi Pers.) 

 U. Geranii (D.C.) (1273 and 1370, JEc. Geranii D.C.) 

 U. Parnassiae (Grev.) (1369). 



(b) HetereuromyeeS) uredo- and teleuto-spores on one host- 

 plant, aecidio-spores and spermogonia on another. 



U. Dactylidis Otth. (p.p. 1358, JEc. Ranunculacearum 

 on Ranunculus bulbosus. ; the other forms are 

 said to occur on Poa nemoralis, Dactylis glome- 



