170 PUCCINIA 
compact, pulvinate and greyish, others brown and pulverulent ; 
a spores oblong or obovate, attenu- 
ated into a horny much thickened 
(up to 8) conical point at the 
apex, constricted, slightly tapering 
C) below, smooth, pale or dark chest- 
nut-brown, 28—40 x 1419 p; 
pedicels hyaline or somewhat yel- 
ee ee een lowish, rather long, deciduous or 
leutospores on V. alpina (ex persistent. 
herb. Berkeley). 
On Veronica alpina, V. offici- 
nalis and perhaps other species. Not common. July—October. 
(Fig. 120.) 
There are two forms of spores in this species; one, fragzlipes, with 
deciduous pedicels ; the other, persistens, with persistent pedicels. In the 
former, the sori are soon naked and pulverulent, the spore-wall is thicker 
and darker-coloured, and germination takes place only after a winter's 
rest. In the latter, the sori are compact, the spores are thin-walled and 
paler and germinate as soon as mature, upon the living plant. But 
occasionally both forms may be seen in the same sorus. It is the latter 
form that spreads the parasite during the summer; the former causes 
new infections in the following spring. 
Distinguished from P. Veronicae by the relatively broader spores, and 
the cone-shaped apical thickening. It is possible that the Pucezniae on 
other species of Veronica, included by the Sydows with this, are really 
distinct. But in Herb. Berkeley there is a Puccinia on Veronica alpina, 
from Ben Aulder, Invernessshire (and also from Perthshire) which is 
undoubtedly this species. The sori are hypophyllous only, but cover the 
larger part of each leaf. The spores are quite smooth, by which it is 
distinguished from the continental form on V. alpina, which has the upper 
spore-cell occasionally warted on the upper part ; this form (P. albulensis 
Magn.) has the sori densely gregarious on stems as well as leaves, some- 
times covering a whole internode. 
DISTRIBUTION: Europe generally. 
43. Puccinia Menthe Pers. 
Micidium Menthae DC. Flor. fr. vi. 95. Cooke, Handb. p. 544; Mier. 
Fung. p. 199. 
Trichobasis Labiatarum Lévy. ; Cooke, Micr. Fung. p. 224 p.p. 
T. Clinopodti DO. ; Cooke, Micr. Fung. p. 224 (?). 
