202 PUCCINIA 
experimentally proved by De Bary and Jacky. Bock (Centralbl. fiir Bakt. 
2. xx. 586) showed that what appeared to be identical with P. Violae could 
also be artificially produced on V. cornuta, V. lutea, V. tricolor; the 
zcidia formed small or large crowded well-defined groups, and thereby 
differed from those of P. aegra which spread widely over the stems and 
leaves of their hosts, mostly standing alone and not collected in groups. 
In the latter, moreover, ecidia and teleutospores can be found in July at 
the same time (or even on the same leaf), which is not usually the case 
with P. Violae. This species can attack cultivated violets, but rarely does 
much harm ; burning the infected plants is a sufficient remedy. 
DisTRIBUTION : World-wide, except Australia. 
74. Puccinia egra Grove. 
Gcidium depauperans Vize, Gard. Chron. (1876) pp. 175, 361, 437. 
Cooke, Micr. Fung. p. 195 ; Grevillea, v. 57. 
Puccinia aegra Grove, Journ. Bot. xxi. (1883) p. 274. Plowr. Ured. 
p. 158. Sace. Syll. vii. 614. 
P. depauperans Sydow, Monogr. i, 442 (1903). 
4icidiospores. Aicidia on all green parts of the host, 
particularly on the stems, not in clusters, but spread pretty 
uniformly over the whole surface, especially of the stems which 
are swollen and distorted, cup-shaped, with a white torn revolute 
margin; spores globose to ellipsoid, smooth, orange, 17—21 x 
14—16 p. 
Uredospores. Sori amphigenous, without spots, irregularly 
scattered or aggregated, occasionally 
confluent, long covered by the lead- 
| coloured epidermis, cinnamon ; spores 
globose to ellipsoid, delicately echinu- 
late, brownish 20—28 pw diam. 
en ae we re Teleutospores. Sori similar, but 
spores and mesospore. darker ; spores ellipsoid or ovoid, 
rounded or gently attenuated above, 
where it is slightly thickened or rather surmounted by a minute 
subhyaline papilla, hardly constricted, usually rounded below, 
very delicately punctate or quite smooth, brown, 22—34 x 16— 
20; pedicels hyaline, short; a few mesospores are found. 
