Fleteropuccinia. 165 
this fungus occurs on Lolium perenne, which it does abundantly in 
this neighbourhood, it is accompanied by a profuse development of 
uredospores, and only in the autumn, from September to November ; 
whereas the P. coronata on Dactylis is an early summer species, with 
a much less free development of uredospores. P. coronata is dis- 
tinguished from all other British species by its coronate teleutospores, 
which are surmounted by a crown of digitate processes ; these, being 
outgrowths of the spore-membrane, and not of the epispore, are dark 
brown in colour. What their precise function may be is unknown, 
but they appear, for one thing, to hold the spores together, so that they 
may be regarded in part as organs of attachment. Sometimes these 
processes are not confined to the summit of the spore, but extend 
downwards, gradually becoming smaller, as far as the septum. Such. 
spores show the transition towards the American species, P. acu/eata, 
Schw. Winter has described a coronate Uromyces, U. digifata, from 
South Australia; and Ellis an American Puccinia, P. digztata, on 
Rhamnus crocea from California. 
Puccinia sessilis. Schneider. 
Aicidiospores—Pseudoperidia on pale roundish or elongated spots, 
circinating, cup-shaped, with broad, torn white edges. Spores 
subglobose, smooth, orange-yellow, 18-25 x 13-20. 
Uredospores—Sori small, elliptical or linear, scattered, yellowish- 
brown. Spores roundish or elliptical, echinulate, pale brown, 
20-28 X 20-23y, without paraphyses. , 
Teleutospores—Sori very small, linear, numerous, covered by the 
epidermis, black, scattered or in linear series. Spores oblong 
or wedge-shaped, apex slightly thickened, generally truncate, 
base attenuated, lower cell often paler, central constriction 
slight, smooth, brown, 25-40 X 15-204. Pedicels very short 
or absent. 
Synonyms. 
Puccinia sessilis, Schneider. Schrot., “ Brandp.,” p. 119. 
Winter in Rabh., “ Krypt. Flor.,” vol. i. p. 222. 
Puccinia linearis, Rob. Cooke, “ Micro. Fungi,” 4th edit., 
p. 203. 
Acidium allii, Grev., “ Flor. Edin.,” p. 447. Berk., “‘ Eng. 
Flor.,” vol. v. p. 369. Cooke, “ Hdbk.,” p. 545; “ Micro. 
Fungi,” 4th edit., p. 200. Johnst., “ Flor. Berw.,” vol. ii. p. 207. 
