HASIDIOMYCETES. 



153 



the teleutospores, see page 147. C. senecionis, on the Groundsel ; its aecidium 

 (Peridermium woljfii) on Pine-leaves (Fig. 155 a). Other species on Sonchus, 

 Petasites, Campanula, Rhinanthacca. 



Clirysomyxa (Fig. 156) has bright red, branched teleutospore-chains ; each 

 spore developes a 4-celled basidium. C. ledi, on Ledum palustre;' its secidia 

 on the leaves of the Fir. C. alietis (Fig. 156), without uredo- and secidio- 

 spores; teleutospores on the leaves of the Fir. In the first summer, yellow 



FIG. 151. Melampsora padi: a and.fr 

 uredospores ; c-f teleutospores, seen 

 from different sides. 



Fi:j. 152. Pear-leaf, seen from the under 

 side, with "ttiesteliacancellata": indifferent 

 ages (a youngest, d oldest). 



. FIG. 153. ATel a in psora uctulina: a, 

 uredospores ; b three contiguous teleu- 

 tospores, one of which has developed 

 a bnsidium with three basidiospores. 

 (x 400.) 



hands are formed on the leaves, and in the following spring the red cushions of 

 spores. 



Cronartium (Figs. 157, 159) has unicellular teleutospores united in numbers 

 to form erect threads or columns ; the uredospores are enclosed in a "peridium " ; 

 C. ribicola (Fig. 157), on leaves of Kibes (especially Black Currants) ; its secidia 

 (Peridermium strobi, or P. klebahni) on the stems and branches of Finns strobus 



