ZAGHOUANIA 331 



The description of the uredo- and teleutospores is after Fischer ; the 

 latter mature in autumn and germinate at once. According to him, the 

 mycelium of the recidial stage is perennial in the rhizome, but Klebahn 

 proved (Zeitschr. f. Pflanzenkr. 1907, p. 144) that the teleutospores infect 

 the growing points of the rhizome in autumn, and produce the tecidia in 

 the following spring. He could also infect other species of Pyrus {Aria, 

 torminalis, scandica, Malus) from the Anemone ; Fischer did the same for 

 P. fennica and P. com run nix. In the Anemone nearly every leaf of the 

 affected plant will be attacked, as well as the flower-shoots. The leaves 

 become longer, narrower and of a paler green, and are borne on longer 

 petioles. They are often divided into more segments than the normal 

 leaves. Fischer remarks that, wdien the fungus appears on the sepals, the 

 cells in the neighbourhood develop chloroplasts. 



The discovery of this hetercecism was due to Dietel and was confirmed 

 by Klebahn ; previously the gecidium has been mistakenly attributed, by 

 Soppitt, to Endophyllum as E. leucospermum. The mode of germination 

 of the spores will, of course, easily distinguish them : about this there 

 seems to have been some misapprehension — Soppitt (Journ. Bot. 1893, 

 p. 274) distinctly stated that the spores did not germinate with "promy- 

 celial " spores, but in the Trans. Brit. Myc. Soc. i. 84, 98, this is altered 

 into the statement that the spores " germinate as do those of the (other) 

 Endophytic/,." 



Puccinia fusca lives upon the same plant (Anemone nemorosa) but 

 affects its host in a diffei'ent way (see p. 215). uEcidimn punctatiim, 

 a stage of Puccinia Pmni-spinosae, is found on A. nemorosa as well as on 

 garden Anemones (A. coronaria), but differs in the character of the 

 broader peridium and in having faintly coloured spores. Moreover, its 

 spermogones are dark-coloured and are found on both sides of the leaf 

 (see p. 207). 



ZAGHOUANIA Patouillartl. 



Sori erumpent, subpulverulent. /Ecidia (Peridermium) 

 with a peridium which is irregularly lacerate above ; margin 

 slightly involute ; spores in short chains, soon seceding. Sper- 

 mogones flask-shaped, with ostiolar filaments. Uredospores 

 pedicellate, solitary. Teleutospores one-celled, ovoid, pedicel- 

 late, with a slightly thickened hyaline and verruculose epispore, 

 germinating as soon as mature ; basidium four-celled, semi- 

 internal ; basidiospores nearly sessile. 



The description is founded upon that given by Dumee and 

 Maire in Bull. Soc. Myc. Fi\, 1902. The semi-internal basidium 

 is characteristic. Dumee and Maire make a separate family, 



