PUCCINIASTRl'M 



365 



Fig. 272. 

 P. Agrimoniae. 



Uredospores. 



spores shortly ellipsoid or obovate, echinulate, orange, 18 — 21 x 



14- /x ; epispore rather thick, with indistinct 



germ-pores. 



[Teleutospores. Sori similar, but indefinite, 

 clear-brown : spores subepidermal, extracellular, 

 emirate, smooth, each divided into four cells 

 by two longitudinal walls at right angles to 

 one .-mother, 30 x 21 — 30 //,.] 



On Agrimonia Eupatoria. Uredospores common, July — 

 September; teleutospores, very rare everywhere, not yet found 

 in Britain. (Fig. 272.) 



We owe our knowledge of the teleutospores to Tranzschel and Dietel ; 

 see Engler u. Prantl, Nattirl. Pflanzenfam. vol. i. pt. 1**, p. 24. Until 

 they were discovered, the position of the 

 fungus was cpiite uncertain. Klebahn (see 

 Zeitschr. f. Pflanzenkr. 1907, xvii. 149) 

 proved that the parasite could maintain 

 itself by over-wintered uredospores. 



Distribution : Europe, Asia, 

 North and South America. 



2. Pucciniastrum Circaeae Speg. 



Uredo Circaeae Schum. PI. Sail. ii. 228. 



Cooke, Micr. Fung. p. 217, pi. 7, 



f. 135, 136. 

 /' '//<:<_■/ '// i a Circaeae Vers. ; Cooke, Handb. 



p. 507 p.p. 

 M/lampsora Circaeae Winter ; Plowr. 



Ured. p. 245. 

 Pucciniastrum Circaeae Speg. Dec. Myc. 

 65. Sacc. Syll. vii. 763. Fischer, 

 Ured. Schweiz, p. 461, f. 302. 



Fig. 273. P. Circaeae. a, half 

 of a leaf of C. lutetiana, 

 showing uredo- sori (slightly 

 enlarged); b, uredospore 

 x600; c, part of peridiuin 

 x 180 ; d, teleutospores, be- 

 neath the epidermis, x 300. 



Uredospores. Sori hypophyllous, 

 on paler patches bounded by veins, 

 minute, yellowish, crowded, slightly confluent, surrounded by 

 the epidermis and by a peridium which opens at the summit 

 with a pore; spores ovate, 21 — 24x12 — 14^; epispore thin, 

 covered with minute distant warts, without evident germ-pores ; 

 paraphyses wanting; peridium usually opening beneath a stoma. 



