ÆCIDIUM B e r b e r i d i s .
Berberry Æcidium.
97
C l a s s a n d O b d e b CRYPTOGAMIA FUNGI, i i » » .— N a t . O e d . G A S T ROM YC I,
EP IPH Y TÆ , Link.
G EN ERIC CHARACTER.
Peridia in foliis vivis parasitica, membranácea, apice dehiscentia, ore plerumque
dentato. Sporidia globosa, minutissima, libera, pulverulenta.
Peridium parasitic on living leaves, membranaceous, bursting at the apex,
the mouth generaUy dentate. Sporidia very minute, dust-like.
S P E C IF IC CHARACTER.
Æ c id iu m Berberidis ; confertum, ghmeratum, peridiis elongatis, cylindricis,
aurantiacis, ore ikntibus deciduis instructo, sporidiis copiosis.
Æ. densely clustered ; peridia elongated, cylindrical, orange, the mouth furnished
with deciduous teeth ; sporidia copious.
Æ c i d i u m Berberidis, Gmel. Syst. p. 1 4 7 3 .-P c r i. Syn. Fung. P - 2 0 9 .-^ f6 .
CÍ Schmein. p. U ÿ . -D e Cand. FI. Franç. ed. 3. v. 2. p. 2A6.~Ejusd^ Sym
p. 5 l.-S om . Fung. t. 397- f- 5. (bad).-Ko»g. ci Nestl. PL Exsicc. No 86.
—Purt. Midi. FL v. 2. p. 72L—Schmein. Syn. Fung. Carol. No. 437-
Hook. FI. Scot. 2 .,p. l i .—Grev. FL Edin. p. 446.
R oestelia b e rbe ridis, Grays Nat. Arr. v. 1. p. 534.
L y c o p e r d o n poculiforme, Jacq. Coll. Aust. 1. p, 122. t. 4. f. 1.
H ab. On the lower surface of tbe leaves, the fruit-stalk, seed-vessel, calyx,
and even corolla of the Common Berberry (Berberís vulgans). May—
July. Frequent throughout Great Britain.
Peridia growing in dense, large or small clusters, of a fine orange colour, more
or less elongated, cylindrical, the orifice somewhat paler, and fin ish ed
with irregular, white, very brittle, deciduous teeth. When the plmit
grows on the leaf, the upper surface is of a fine red colour ; when on the
calyx or seed-vessel, the parts are thickened and distorted. Sporidia
profuse, globose, yellow under the microscope, and, if a high power is
used, appearing to be reticulated.
This minute Gastromycus is one of the most beautiful ot
its tribe, and has given rise to the vulgar opinion that the neigh