E R IN E U M CLANDESTINUM.
Concealed Erineum.
S PE C IF IC CHARACTER.
E rineum cla iid estiiium ; hypophyllum, confluens, albo-roseum demum dilute fe r -
mghieum, pkrmnque margine fo lii involuto tectum; peridiis laxis bremter da-
vatis.
E. on the inferior surface of the leaf, confluent, pinkish-white, at length
pale ferruginous, generally concealed by the involute margin o f the leaf;
peridia lax, shortly clavate.
E rineum clandestinum, Grev. in Edinb. Phil. Journ. v. 6. p. 76. t. 2. f. 8.__
Ejusd. Fl. Edin. p. 4/50.— Kunze, Mykol. Hefte, 2. p. 144.
E rineum Oxycanthee, Pers. Mycol. Europ. 1 . p. U 5 .~ 0 p itz , Fl. Crypt. E x sicc.
Bcemice, No. 7.
H ab. On the leaves o f the Crataegus Oxyacantha, the Common Thorn tree.
Spring and summer, frequent.
This plant is rarely found towards the centre of the leaf, b u t is almost invariably
concealed by the margin, which is rolled inwards, and rendered
very conspicuous from its paler colour, and diseased aspect. The peridia
forin an uninterrupted line along the margin, and grow in a lax manner.
Their colour, when young, is nearly wliite, with a pleasant tinge of
p in k : in old age pale ferruginous. In form, they are not so regular as
the preceding species, b u t are quite simple, and more or less shortly
clavate.'
Few species of Erineum are better marked by a peculiar
situariou tbau E . clandestinum; it is indeed far more likely to
be discovered by the entomologist than the botanist, as the
leaves which produce it have all tbe appearance of being the
nidus of some insect.
W e are not informed when P e u s o o n found this species;
but M. O p itz asserts the merit of the discovery to be due to
M. JU NGBAUER, who detected it in 1819 {Bot. Zeitun^
Oct. 1822).
Fig. 2. a, E. clandesth'inum. b, Peridia magnijied.