246 



PUCCINIA 



heteroecioua and autoecious species respectively, though this is certainly 

 qo1 always true 



The only British species of Carex which have been proved by cultures 

 to be connected with this secidium are ('. caryophyllea (praecox) and 

 0, armaria, but it is supposed to grow also on a large number of other 



species. The matter is, however, complicated \>y the fact that there are 

 two other Pucciniae /'. arenariicola and P. Schoeleriana) which are very 

 closely allied and differ chiefly in having their secidia on other hosts. 



DISTRIBUTION : Europe and Siberia. 



112. Puccinia Schoeleriana Plowr. et Magn. 



JScidium Jacobaeae Grev. Flor. Edin. p. 445. 



JE. Compositarum var. Jacobaeae; Cooke, Handb. p. 542 ; Micr. 



Fung. p. 198 p.p. 

 ./•,'. Senecionis Fischer, Fred. Schweiz, p. 534, f. 335(?). 

 Puccinia Schoeleriana P. et M. Quart. J. Micr. Sci. xxv. (new ser.) 

 pp. 107, 170. Phill. et Plowr. Grevillea, xiii. 54. Plowr. Journ. 

 Linn. Soe. xxiv. 91 ; Ured. p. 171. Sacc. Syll. vii. 027. Sydow, 

 Monogr. i. 659. 



Spermogones. Epiphyllous, orange. 

 JEcidiospores. iEcidia hypophyl- 

 lous, clustered on roundish yellow or 

 brownish spots as much as 1 cm. diam., 

 cup-shaped, with a torn white reflexed 

 margin ; spores delicately echinulate, 

 orange, 15 — 21 /x. 



Uredospores. Sori generally hypo- 

 phyllous, on yellowish spots, scattered, 

 minute, roundish or oblong, pulveru- 

 lent, surrounded by the cleft epidermis, 

 pale-brown ; spores globose to ovate, 

 echinulate, yellow-brown, 24 — 30 x 16 

 — 25 fl. 



Teleutospores. Sori hypophyllous, 

 scattered or aggregated, \ — H mm. 

 long, oblong, surrounded by the turn 

 epidermis, pulvinate, black ; spores 

 Fi,. 190. p. schoei^nu, clavate or fusoid, rounded or conically 

 Teleutospores, from one of attenuated above and much thickened 

 Plowright's cultures on C. ^ ^ ^ ^^ constricted| tapering 



