262 



PUCCINIA 



el) Puccinia bromina Erikss. 



Puccinia bromina Erikss. I.e. p. 271, pi. xii, f. 1:2 — 17. Sydow, Monogr. 



i. TIi.'. McAlpine, Rusts of Australia, p. L16, pi. ( ', and fig. 28. 

 /'. Symphyti-Bromorum F. Mull. Beihefte Bot. Centralbl. 1901, x. 201. 



Klebahn, I.e. p. 239. Fischer, Qred. Schweiz, p. 3">!», f. 262. 

 /'. dispersa Erikss.; Marshall Ward, Ann. Bot. L902, xvi. -I?,?,-, 



Annal. Mycol. 1903, p. 132. Freeman, Ann. Bot. ibid. p. 4N7. 

 Mcidium Symphyti and M. Pulmonariae Thiim. 



Spermogones. Horn \ -coloured. 



.Eridtusporrs. .Ecidia hypophyllous or on the petioles, 

 sometimes even on the calyx, seated on large round or irregular 

 -pots which are purplish-brown and surrounded by a yellow 

 zone, cup-shaped, with an incised revolute margin ; spores 

 verruculose, orange, 18 — '21 fx. 



199. P. bromina. a, teleutospores ; b, a mesospore ; c, paraphyses 

 surrounding the teleuto-sori ; </, uredospores (empty) ; e, paraphysis in the 

 uredo-sori. On Bromus sterilis. 



.Ki-idia on Symphytum officinale: uredo- and teleutospores 

 on many species of Bromus, sometimes even on the inflorescence, 

 teleutospores from June onwards. (Fig. 199.) 



The teleutospores germinate only after the winters rest ; Ward found 

 germinable uredospores even in February and March : it has been proved 

 that an recidium on Pulmonaria montana belongs to the same life-cycle. 

 F. Miiller, E. S. Freeman, and especially Marshall Ward, have investigated 

 the Brown Rusts of the Brumes, and have discovered a wonderful series of 

 inter-relations among them. 



(3) Puccinia triticixa Erikss. 



Puccinia triticina Erikss. I.e. p. 270, pi. xi, f. 7 — 11. Sydow, Monogr. 

 i. Tin. Klebahn, I.e. p. 24.">. Fischer, Ured. Schweiz, p. 366. 

 McAlpine, Rusts of Australia, p. 132, pi. i, f. 3, 6, 10; pi. xl, 

 f. 302; pi. A, f. 1, 2. 



