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C l a s s a n d O r d e r CRYPTOGAMIA FUNGI, Z , r á « . _ N A i . O r d . G A S T RO M YC l, Grev.
—e p i p h y tæ , £rá/c.—f u n g i , J uss. De Cand.
G EN ERIC CHARACTER.
Pendium verum 0. Sporidia uni aut muUihculata, pedicellata, pedicello fix a , et
H cæspitulis aggregata foliis vivis parasitici. Epidermis foliorum peridio
True peridium 0. Sporidia one or many-celled, pedicellated, fixed by the
pedicel, and growing in minute clusters on living leaves. The epidermis
bearing a strong resemblance to a peridium.
S PE C IF IC c h a r a c t e r .
P u c c i n i a Fabas; bifrons, nigra, depressa, orbkulata. Sporidia 1-hculata,
ovato-globosa, pedicellis elongaiis, gracilis, albis.
P. growing on both sides of the leaf, nearly black, depressed, circular. Sporidia,
one-celled, ovato-globose, with elongated slender, white pedicels.
P u c c i n i a Fabm, Grev. Fl. Fdin. ined.
H a b . On the leaves o f the common field Bean, {Vkia Faba). About Ashbourne
in Derbyshire. In Kinross-shire, and ai-ound Edinburgh. Sum-
mer and Autumn.
Scattered on both surfaces of the leaf, orbicular, blackish, depressed, even,
girt over with the remains of the ruptured epidermis, which, before burst-
ing, is o f a grey colour. Sporidia densely crowded, one-celled, pretty
regularly ovato-globose, fixed by a slender white elongated pedicel.
This must uot be confouuded with Uredo Fahce, which is
ofteu to be seeu ou the same leaf: the Puccinia is much darker,
aud does uot scatter its sporidia, as is frequeutly the ease wtth
the Uredo; the latter is also more uumerous. Uuder the microscope,
the differeuce is at once perceptible. This is the only
species I have observed in this country with unilocular sporidia.
Fig. 1. Puccinia Fabæ on a lea f o f Vkia faba.
Fig. 3. Sporidia.
V O L . I .
Fig. 2. Ditto, magnified.