Micropuccin ia. 20- 



Exsiccati. 

 Berk., 329. Cooke, i. 48; ii. 132. Vize, " Fungi Brit,," 29. 



On Cotyledon nmbilian. 

 May and June. 



Biology.— The small sori are surrounded by a pseudoperidium, 

 from which the spores eventually fall out, leaving a honeycomb-like 

 matri.x. 



Pnccinia fusca. (~Relhan.) 



Teleutospores — Sori black-brown, scattered equally over the whole 

 surface of the leaves, small, round, pulverulent, often con- 

 fluent. Spores formed of two almost spherical cells, which 

 are flattened at their point of contact, hence the spores are 

 strongly constricted and easily fall apart, thickly covered with 

 large warts, brown, 30-50 X 15-24/x. Pedicels stout, hyaline. 

 Mycelium perennial. 



SynonyjHs. 



Puccinia fusca (Relh.). Winter in Rabh., " Krypt. Flor.," vol. i. 

 p. 199. 



ALcidiuvi fusaim. Relh., "Flor. Cantab. Suppl.," ii. 



Pticcinia anemones. Pers., " Syn.," p. 226. Berk., " Eng. 

 Flor.," vol. v. p. 367. Cooke, " Hdbk.," p. 503 ; " Micro. Fungi," 

 4th edit., p. 209, t. iv. figs. 64, 65. 



Exsiccati. 



Baxter, 82. Berk., 222. Cooke, i. 43 ; ii. 530; " L. F.," 18. 

 Vize, " Fungi Brit," 26. 



On Anemone ne?norosa. 

 April to July. 



Biology. — The mycelium is perennial, and was found by De Bary 

 in the upper part of the rhizome. The teleutospores are accompanied 

 by spermogonia. The aecidiospores {A£. leucospennum), which con- 

 tinental botanists regard as belonging to this Puccinia, are much less 

 common than the teleutospores, and further experimental culture is 

 desirable as to the life-history of this well-known and widely distributed 

 species. 



