244 



PUCCINIA 



round uredospores, but most of the other biological races of /'. Riberii 

 Caricis have them oval <>r oblong. There is no remedy for this disease on 

 the ( Juoseberry '".' t<> gather and burn all diseased leaves and fruit, etc., 

 and even this will be of no avail so long as the affected Carices continue 

 to exist. Luckily the disease rarely does much harm. 



110. Puccinia dioicae Magn. 



.Kctdiuni Cirsii DC. Flor. fr. vi. 94. 



Puccinia dioieae .Magn. Tag. Nat. Vers. Miinchen, L877, p. 200. Plowr. 



Ured. p. 173. Sacc. Syll. vii. 629. Sydow, Monogr. i. 653. 



Fischer, Ured. Schweiz, p. 283, f. 208. 



Spermogones. 

 /Ecidiospores. 



In little clusters, honey-coloured. 

 iEcidia hypophyllous, on roundish yellow or 

 brownish spots, in clusters 2 — 5 mm. diam., 

 cup-shaped, with torn white margin : 

 spores delicately verruculose, orange, 18 

 — 25 fj.. 



[Uredospores. Sori scattered, minute 

 punctiform, brown ; spores globose to 

 ellipsoid, echinulate, pale-brown, 18 — 

 25 ft. 



Teleutospores. Sori scattered, roundish 

 or oblong, 1 mm. long, soon naked, sur- 

 rounded by the cleft epidermis, pulvinate, 

 black ; spores clavate, rounded or conical 

 and much thickened (up to 14 fj,) above, 

 gently constricted, tapering below, smooth, brown, darker at 

 the apex, 35 — 56 x 14 — 20 /a, occasionally 70 /z lung; pedicels 

 brownish, persistent, as much as 50 /u. long.] 



iEcidia on Girsium palustre, C. pratense, and (on the conti- 

 nent) on other species of Girsium, •June, July; uredo- and 

 teleutospores on Gareoc dioica, C. DavallianaiJ). Very rare; 

 Scotland, Ireland. I have not seen the teleutospores. (Fig. 

 188. ) 



Fig. 1S8. P. dioii 

 .Kcidia on C. pratense., 

 co. Mayo (J. Adams), 

 nat. size. 



Distribution: Northern parts of Europe. 



