Micropticcinia. 20 1 



Puccinia schneideri. Schrot. 



Teleutospores — Mycelium pervading the stems and leaves of the 

 affected plants, causing an increase in length of the former, 

 and more or less crumpling of the latter. Sori small, black- 

 brown, for some time covered by the epidermis, usually 

 elongated, pulverulent. Spores elliptical, rounded at both 

 ends, apex thickened, medial constriction pronounced, smooth, 

 chestnut-brown, 25-28 x 15-18/x. Pedicels deciduous, 

 colourless. 



Synonyms. 



Puccinia schneideri. Schrot., " Krypt. Flor. Schl.,'" vol. iii. 



P- 344- 



Puccinia caulifuola. Schneider, 48, Jahresber d. Schles. Ges., 

 1870, p. 120. 



On Thynius se>-pylhun. 



June to October. 



Links., Aberdeen ; Prof. J. W. H. Trail. 



Biology. — The presence of the mycelium in the affected stems 

 causes them to assume a more erect habit of growth, so that they 

 can be distinguished from the healthy plants by the naked eye. 



Puccinia segopodii. (Schum.) 



Teleutospores — Sori on brown spots, on the leaves, small, roundish, 

 crowded, on the petioles generally larger, at first yellow, then 

 brown. Spores elliptical, oval, or subpyriform, constriction little 

 or none,, apex generally surmounted by a paler papilla, dark 

 chestnut-brown, 30-40 x 15-23/x. Pedicels colourless, 

 deciduous. 



Synonyms. 



Puccinia cegopodii (Schum.). Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 174. 



Uredo cegopodii. Schum., " Enum. Plant Saell," vol. ii. p. 2^. 



Puccinia cegopodii, Link. Berk., " Eng. Flor.," vol. v. p. 366. 

 Cooke, "Hdbk.," p. 502; "Micro. Fungi," 4th edit., p. 208. 

 Grev., "Flor. Edin.," p. 429. 



