L94 puccinia 



(iii. Puccinia Heraclei (iiev. 



Trichobasis Heraclei lierk. ; Cooke, Micr. Fung. p. 22"). 



Puccinia Heraclei Grev. Scot. Cr. Flor. pL 12. Cooke, Handb. 



p. 502 ; Micr. Fung. p. 208. Sydow, Monogr. i. 387. Fischer, 



Ured. Schweiz, p. L32. 

 /'. Pimpinellae Strauss ; Plowr. Cfred. p. 155 p.p. 



Spermogones. Amphigenous, scattered amongst the secidia, 

 pale-yellowish. 



dEcidiospores. J->idia hypophyllous, frequently on the 



[m tidies and especially on the nerves of the 



leaves, on thickened yellowish spots, densely 



crowded in irregular clusters, often causing 



distortion, between cup-shaped and pustulate, 



sometimes almost spherical and superficial; 



peridium feebly developed, opening by a 



rounded pore ; spores delicately verruculose, 



yellowish, 21—32x18—28^. 



clei. " Keidia on U redospures. Sori amphigenous, scattered, 



Beracleum (re- minute, chestnut-brown ; spores globose to 



ellipsoid, densely echinulate, pale-brown, 25 — 



32 x 19 — 27 fji, with three or four germ-pores. 



Teleutospores. Sori similar or more or less confluent on the 

 nerves, surrounded by the ferruginous epidermis, pulverulent, 

 blackish ; spores ellipsoid, rounded at both ends, hardly con- 

 stricted, reticulated, brown, 26 — 37 x 18 — 27 /j. ; pedicels hya- 

 line, short, deciduous. 



On Heracleum Sphondylium. zEcidia, March — June; teleu- 

 tospores, August. Not common. (Fig. 142.) 



This species closely resembles P. CkaerophyUi, but is distinguished by 

 its less densely reticulated teleutospores. Seruadeni proved by experi- 

 ment that they are distinct species, but no one has as yet reared all the 

 spore-forms of P. Heraclei from the basidiospores, as has been done 

 for P. Chaerophylli. The aecidia of this species are more conspicuous 

 than those of its allies ; they occur in swollen patches, reminding one 

 of the eecidia <>n .Siiu/rniun, <)1 uxntrum, and being sometimes almost 

 spherical and superficial might be compared to a group of miniature Peziza 

 vesiculosa. 



Distribution : Central and North-western Europe. 



