218 PUCCINIA 
Uredospores. Sori generally hypophyllous, minute, scattered, 
punctiform, round, soon naked, surrounded by the erect epidermis, 
chestnut; spores ellipsoid, echinulate, brownish-yellow, 22—30 x 
20—25 yu, 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 yu ; pedicels nearly hyaline, 
short, deciduous. 
On Caltha palustris. Rather rare; Shropshire, Scarborough, 
Rhydd-y-fen, Gullan Loch, Ireland (co. Dublin). Aicidia in 
May; teleutospores, August—December (June—September, 
Fischer). (Fig. 166.) 
Distinguished from P. Calthae 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 ecidia 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 (J.c.). Krieg showed (Centralbl. f. Bakt. 2. xv. 259) 
that P. Zopfii is autecious, 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 P. Zop/iz, though this is not 
always so well marked. 
DISTRIBUTION: Central Europe. 
90. Puccinia Lychnidearum Link. 
Puceinia Lychnidearum Link, Sp. Pl. 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. Sace. 
Syll. vii. 683. Sydow, Monogr. i. 553. Fischer, Ured. Schweiz, 
p. 307, f, 224. McAlpine, Rusts of Australia, p. 177, f. 97 
(introduced on Stel/aria media). 
