2 IS PUCCINIA 



Urcdosporcs. Sori generally hypophyllous, minute, scattered, 

 puncl id in 11, round, soon naked, surrounded by the erect epidermis, 

 chestnut; spores ellipsoid, echinulate, brownish-yellow, 22 — 30 x 

 2<) — 25 [i, with two or three germ-pores. 



Teleutospores. Sori similar, but darker; spores oblong to 

 obovate, rounded at both ends, sometimes truncate above or 

 slightly narrowed below, scarcely thickened but with a broad 

 flat papilla at the apex, gently constricted, delicately verruculose, 

 dark chestnut-brown, 35 — 60 x 24 — 35 /x ; pedicels nearly hyaline, 

 short, deciduous. 



On Caltha palustris. Rather rare; Shropshire, Scarborough, 

 Rhydd-y-fen, Gullan Loch, Ireland (co. Dublin). /Ecidia in 

 May; teleutospores, August — December (June — September, 

 Fischer). (Fig. 166.) 



Distinguished from P. Ca.lthae essentially by its teleutospores which 

 are provided with a few. rather distant, minute warts, mostly towards the 

 upper end ; these are difficult to see except when viewed dry. The spores 

 are also relatively much broader and not narrowed towards the summit, 

 and are therefore easily seen to be distinct in shape ; they are darker in 

 colour and have shorter pedicels. The secidia are not known to be different 

 from those of P. Calthae ; those described above probably belong to 

 P. Zopfii, because they were found in the same neighbourhood as the 

 teleutospores in Ireland : the cells of the peridium agreed with those 

 figured by Fischer (I.e.). Krieg showed (Centralbl. f. Bakt. 2. xv. 259) 

 that P. Zopfii is autoecious, like P. Calthae. 



The two species have been frequently confounded in herbaria ; but, if 

 I may judge by the specimens I have seen, the teleuto-sori of P. Calthae 

 are larger, more crowded, more often circinate, more compact, and remain 

 longer covered by the epidermis than those of /'. Zopfii, though this is not 

 always so well marked. 



Distribution: Central Europe. 



90. Puccinia Lychnidearum Link. 



Puccinia Lychnidearum Link, Sp. PI. ii. 80 (1825). Cooke, Handb. 



p. 505 ; Micr. Fung. p. 210 p.p. Plowr. Ured. p. 196. 

 P. Arenariae Winter, Pilze, p. 169 (1884). Plowr. Ured. p. 210. Sacc. 



Syll. vii. 683. Sydow, Monogr. i. 053. Fischer, Ured. Schweiz, 



p. 307, f. 224. McAlpine, Rusts of Australia, p. 177, f. 97 



(introduced on SteUaria media). 



