136 



PUCCINIA 



Formerly united with Puccinia Absinthii, from which it is distinguished 

 1 > v its (on tin' average) narrower and shorter teleutospores, with longer 

 pedicels. I could not sec in any case that the teleutospores were verru- 

 culose, as thej are Baid to be. 



|)isTKii:i T Tiox: North- western and Central Europe. 



8. Puccinia expansa Link. 



Puccini" expansa Link, Sp. PL vi. 2, p. 75. Sydow, Monogr. i. 146. 



Fischer, Ured. Schweiz, p. 182, f. 141—2. 

 P. Senecionis Cooke, Micr. Fung. p. 207. Plowr. Ured. p. 209, 



(non Lib.). 



Teleutospores. Sori amphigenous,but generally hypophylli mis, 



on round yellowish or brownish 

 spots, densely crowded and con- 

 fluent in roundish clusters 5 — 8 

 ram. broad, blackish-brown; spores 

 ovate or broadly ellipsoid, rounded 

 at both ends, with a minute paler 

 apical papilla, hardly constricted, 

 smooth, brown, 30 — 40 x 19 — 30/*, 

 but sometimes smaller; pedicels 

 hyaline, very short ; an occasional mesospore is seen. 



On Senecio aquaticus, S. Jacobaea. Not common. July- 

 September. (Fig. 88.) 



The sori of this species are chiefly on the underside of the leaf; they 

 are collected into roundish or elongated groups and open by a small round 

 pore, after the manner of some recidia, so that, when the spores have 

 fallen out, the group looks like a honeycomb. P. glomerata is said to be 

 distinguished by its paler, narrower and longer spores with a smaller 

 papilla, and by having the sori on both leaf-surfaces. I think the two 

 species are the same so far as our specimens are concerned, but have 

 followed Sydows' Monographia pro tern. Plowright has confused the 

 characters of the two, partly because he thought his species on S. aquaticus 

 was P. Senecionis Lib., which is incorrect. The true P. Senecionis Lib. 

 has not been found in Britain. 



Distribution : Central Europe, Holland, California. 



Puccinia glomerata Grew 



Puccinia glomerata Grew in Berk. Eng. Fl. v. 365. Cooke, Handb. 

 p. 500 ; Micr. Fung. p. 206. Plowr. Ured. p. 209. Sj'dow, 

 Monogr. i. 148, t. 8, f. 125. 



88. V. expansa. Teleuto- 

 spores and mesospore, on ,S'. 

 Jacobaea. 



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