Scientific name: Hypocrea gelatinosa (Tode) Fr.
Derivation of name: Gelatinosa means "gelatinous" in
reference to the soft, jelly-like texture of the fruit body.
Synonyms: Creopus gelatinosus (Tode ex Fr.) Link
Occurrence on wood substrate: Saprobic; scattered to
densely clustered on decaying wood; July to October.
Dimensions: Fruitbodies are 1-3 mm wide, cushion-shaped
to nearly spherical.
Description: The soft, gelatinous, translucent fruit bodies are
pale yellow at first. Green dots appear at the surface and
mature into dark green, protruding perithecia.
Comments: At maturity, the smooth surface of the fruitbody
roughened by the protruding necks of the perithecia
in the fruitbody. The perithecial necks are green
due to the
green ascospores produced within.
Hypocrea gelatinosa is quite small as evidenced
by the small whitish dots on this decaying branch. One
must get really close to see the fruitbodies. Photo © Gary
Figure 2. As is true with so many tiny things on wood,
getting close and pulling out a hand lens is well worth the
effort. Close observation of the small fruitbodies in Figure 1
reveals the green dots of the developing perithecia. Photo ©
As the green ascospores mature, they fill the
of the protruding perithecia, resulting in the green
pimple-dotted appearence of Hypocrea gelatinosa.
Photo © Gary
Figure 4. Hypocrea gelatinosa often grows in dense
Photo © John Dawson.
Figure 5. This photo clearly shows the rounded shape of
fruitbodies and the manner in which the perithecia
from the fruitbodies. Photo © John Dawson.