ON COMPOSITE 



131 



the epidermis and resemble rather a Dothidea or Asteroma than a Puccinia. 

 The spores bear a slight resemblance to those of P. Poarum, but are more 

 fusiform, and much more thickened at the apex. Mixed with them are 

 sometimes a number of mesospores. 



Distribution : Europe, except the southern parts. 



Fig. 82. 



P. Millefolii. 



spores. 



Teleuto- 



3. Puccinia Millefolii Fckl. 



Puccinia Millefolii Fckl. Symb. Myc. p. 55. Cooke, Micr. Fung. p. 207. 

 Plowr. Urecl. p. 215. Sydow, Monogr. i. 2. Fischer, Ured. 

 Schweiz, p. 296, f. 216. 



Teleutospores. Sori amphigenous, on indistinct spots, 

 minute, roundish or irregular, gene- 

 rally scattered, compact, dark- 

 brown ; spores oblong or clavate, 

 rounded or gently attenuated at the 

 apex and thickened (4 — 9 /a), con- 

 stricted, more or less tapering below, 

 smooth, pale-brownish, 35 — 50 x 

 13 — 19 n ; pedicels yellowish above, 

 thick, persistent, about 40 jx long; 

 a few mesospores are sometimes 

 intermixed. 



On Achillea Millefolium. For- 

 den ; St Leonards. August — October. (Fig. 82.) 



Plowright demonstrated {I.e. p. 216) that this species is quite distinct 

 from P. Tripolii, with which it had been previously united, and his con- 

 clusion has been confirmed by Magnus and others. The species is rather 

 uncommon ; there is a closely allied one on A. Ptarmica (P. Ptarmicae 

 Karst.) which has not yet been seen in Britain. The spores of P. Mille- 

 folii germinate as soon as mature. 



Distribution : Central and Western Europe. 



4. Puccinia Chrysanthemi Roze. 



Uredo Chrysanthemi Roze ; Plowright in Trans. Brit. Myc. Soc. i. 98. 



Puccinia Chrysanthemi Roze, Bull. Soc. Myc. Fr. 1900, p. 92. Sacc. 

 Syll. xvi. 296. Sydow, Monogr. i. 46, 854. McAlpine, Rusts of 

 Australia, p. 153, f. 251—5, and pi. E, f. 21. Fischer, Ured. 

 Schweiz, p. 190, f. 150. 



P. Chrysanthemi-chinensis Henn. in Hedwig. xl. 26 (1901). 



9—2 



