128 
PUCCINIA 
Concerning the difference between this species and U. Dactylidis 
i/ 
Fig. 79. Acidia of U. 
Poae (b) and teleuto- 
sori of U. Ficariae 
(a), on a leaf of R. 
Ficaria, nat. size. 
to this latter species. 
(apart from the habitat) little that is definite can 
be said. Some authors unite them, but I find the 
teleutospores of U. Poae to be usually more oblong 
and often provided with shorter pedicels and the 
sori to be less conspicuous. The leaves of Poa are 
smaller than those of Dactylis, and the teleuto-sori 
do not cover them in such enormous numbers and 
never extend to the culms. 
Juel divides this species into 9 or 10 biological 
races, but there is the usual conflict between 
different experimenters as to their limits. Some 
would even deny, what has been proved several 
times, that an wcidium on kk. LYcarta belongs 
here: see U. Rumic’s (p. 115). This ecidium 
and U. Ficariwe may occasionally be found on the 
sane leaf of R. Miearia. (Fig. 79.) 
It must not be forgotten th t an eei 7ium which 
occurs on £&. bulbosus and Lk. repens be 
Puccinia Magnusiana : this is morphologically in- 
distinguishable but is said to be later in its 
appearance. The eecidia which can be seen on 
pngs to 
RL. repens in July and August possibly all belong 
The teleutospores of (. Pode can most easily be 
found by looking on the lower leaves of Poa in June or July along a damp 
road-side where #. repens is abundant. 
DISTRIBUTION: Europe, Asia Minor, Nova 8 zotia 
PUCCINIA Pers. 
Autcecious or hetercecious. 
Spermogones asin Uromyces. Meidia witha peridium, which 
is occasionally evanescent ; spores as in Uromyces. Uredospores 
as in Uromyces. Teleutospores two-celled, rarely one- or several- 
celled, the upper cell usually with an apical pore, less often the 
pore is displaced to the side; the lower cells with a pore just 
beneath the septum or rarely at a lower level. Basidiospores as 
in Uronyces. 
