Thallus granulose, passing into chinky, verrucose, subareolate and
subsquamulose conditions, seldom or never disappearing; apothecia minute
to large, adnate or rarely immersed more or less, exciple usually weak
and becoming covered; hypothecium commonly some shade of yellow or
brown; hymenium pale to light brown; spores hyaline, acicular, varying
from 4- to 16-celled, often curved or variously twisted, usually 8 in
each ascus.


KEY TO THE SPECIES OF BACIDIA

On rocks.
Spores hamate or spirally twisted 7. B. _umbrina_
Spores straight or only slightly curved.
Thallus ash- or green-gray 5. B. _inundata_
Thallus olive or darker 1. B. _egenuloidea_
On bark.
Spores less than 40 mic. in length 6. B. _incompta_
Spores 40 to 70 mic. long.
Apothecia flesh-yellow to red-brown 2. B. _rubella_
Apothecia brown to black.
Apothecia usually brown with a striate, usually
pruinose margin 3. B. _fuscorubella_
Apothecia usually black Of dark brown, without striate
and pruinose margin 4. B. _schweinitzii_


1. Bacidia egenuloidea sp. nov.

Thallus of minute, crowded granules, forming a rather thick,