ON POLYGONACE^E 



227 



seen no British specimens but those collected at Mar Lodge and Braemar, 

 which are described above ; the spores of these agree with those of a 

 specimen on Pol. riviparum issued by Fuckel (see Symb. Myc. p. 57). It is 

 a purely Alpine species. 



97. Puccinia Polygoni-amphibii Pers. 



JEcidium Geranii DC. ; Cooke, Handb. p. 543; Micr. Fung. p. 199 



p.p.;(?). 

 JE. sanguinolentum Lindr. Myk. Notiz. in Bot. Notis. 1900, p. 241. 

 Uredo Polygonorum DC. ; Grev. Sc. Cr. Fl. pi. 80. 

 Trichobasis Polygonorum Berk. ; Cooke, Micr. Fung. p. 226 p.p. 

 Puccinia Polygonorum Link ; Cooke, Handb. p. 495 ; Micr. Fung. 



p. 203 p.p. 

 P. Polygoni Pers. ; Plowr. Ured. p. 188 p.p. Sacc. Syll. vii. 636 p.p. 

 P. Polygoni-amphibii Pers. Syn. p. 227 ; Sydow, Monogr. i. 569 p.p. 



Fischer, Ured. Schweiz, p. 301, f. 220. 



[Spermogones. Few, amphigenous. 



jEcidiospores. yEcidia hypophyllous, mostly in concentric 

 groups, on well-marked spots which 

 are deep-red or purplish and often 

 surrounded by a conspicuous green- 

 ish-yellow zone, sometimes occupying 

 the greater part of a leaf, cup-shaped, 

 with a much cut recurved margin; 

 spores finely punctate-verruculose, 

 yellowish, 18— 28 ^.] 



Uredospores. Sori amphigenous, 

 more often hypophyllous, scattered, 

 roundish, soon naked, pulverulent, 

 brownish; spores ellipsoid to obovate, 

 faintly echinulate, yellowish-brown, 

 25 — 28 x 18 — 21 ix, with two germ- 

 pores in the upper half. 



Teleutospores. Sori chiefly hypophyllous, not projecting, 

 long covered by the epidermis, surrounding the uredo-sori in a 

 circular fashion, dark-brown ; spores oblong to clavate, rounded 

 and thickened above (5 — 12 /x), often obliquely conical at the 

 apex, more or less tapering below, gently constricted, smooth, 

 yellow-brown, 35—52x16 — 22 /j,; pedicels nearly hyaline, 

 persistent. 



15—2 



Fig. 175. P. Polygoni-amphi- 

 bii. Teleutospores, on P. 

 amphibium. 



