jECIDIUM GRossuLARi.a:.
Gooseberry-leaf jE c id ium .
0 0 oo* ™o o^
° o o
C lass a n d O r d e r CRYPTOGAMIA FUNGI, i i n « .— N a t . O r d . GASTROMYCI,
Grc«._EPIPHYTJ3, Link.
G EN ERIC CHARACTER.
Peridia in foliis vivis parasitica, membranacea, apice dehiscentia, ore plerumque
dentato. Sporidio globosa, minutissima, libera, puherulenta.
Peridium parasitic on living leaves, membranaceous, bursting at the apex,
the mouth generally dentate. Sporidia very minute, free, dust-like.
S PE C IF IC c h a r a c t e r .
.®ciDiuM Grossulariie ; hypophyllum, in maculam rubram et incrassatam coarc-
tatum; peridiis in lacinias pallidas rewlutas dehiscentibus ; sporidiis plerumque
albidis.
M. hypophyllous, crowded on a red and incrassated spot ; peridia bursting
into pale revolute segments ; sporidia mostly whitish.
j E c i d i u m Grossularias, De Cand. FI. Frang. v. 6. p. 92-
.3Ecidium Rumicis, /3, Pers. Syn. Fung. p. 207 Alb. et Schw. Conspect. Fung.
p. 1 16 .—Moug. et Nestl. PI. Exsicc. No. 287-
A5c id iu m r u b e l l u m , /3, Gmel. Syst. Nat. Linn. 2 . p . 1 4 7 3 .
H a b . On the lower surface of the leaves, and even on the fruit, of the Common
Gooseberry, GroiiwfanaJ. Frequent. June.
This plant may be recognised at first sight by the bright red spots which it
produces on those leaves which it attacks. Tufts or spots, 2 or 3 lines
broad, mostly crowded with peridia, except in the centre, which is frequently
unoccupied. Substance of the leaf much thickened ; and, if the
plant grows on the berry, the latter becomes distorted. Peridia depressed,
white, with a yellowish tinge, very numerous, splitting into a few, broad,
revolute segments, which are sometimes deciduous. Sporidia whitish or
pale orange.
A plant in some seasons rather destructive to the young
fruit of the Gooseberry, though most commonly found upon
the leaves.
It was formerly considered as a variety of jE cidium ru-
hellum of G m e i - in , hut appears to differ very essentially.
VOL. I I.