Dermea cerasi (Pers.) Fr.
no common name
Dermateaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
no common name
Dermateaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Species Information
Summary:
Features include small, blackish, cup-shaped to cushion-shaped fruitbodies, brown-black exterior that projects as a margin, clustered growth from under bark on dead Prunus branches, conidial stage also emerging, and microscopic characters.
Microscopic:
spores 15-25 x 4-5 microns, fusiform-elliptic, straight or slightly curved on one side, smooth, colorless, with 1 to several droplets, with 1 septum when mature, uniseriate; asci 8-spored, 100-125 x 10 microns, amyloid; paraphyses filiform [thread-like], sometimes forked toward tip, septate, (Breitenbach), spores 15-25 x 5-7 microns, elliptic-fusoid, colorless to yellowish, straight or slightly curved, simple becoming 3-septate; asci 8-spored, reaching 100-150 microns long and 10-15 microns wide, cylindric-clavate, tapering in lower part to a stem-like base; paraphyses simple or branched, the tips swollen and forming a yellowish epithecium; conidia 35-65 x 2.5-4.5 microns, sickle-shaped or almost straight, fusiform [spindle-shaped], colorless to faintly yellowish, simple or 1-septate; conidiophores 10-25 x 2-2.5 microns, simple or branched, tapering to a slender tip; microconidia 12-23 x 1-1.5 microns, filiform [thread-like], straight or curved, simple, colorless, (Seaver),
Notes:
Dermea cerasi is found from ME to WA and SC, is probably widely distributed through North America, and is also found in Europe, (Seaver). It is found in Switzerland (Breitenbach). Collections were examined from BC, NS, ON, PQ, MD, ME, MI, NH, NJ, NY, PA, Austria, Belgium, Hungary, Sweden, and the United Kingdom, (Groves).
Habitat and Range
SIMILAR SPECIES
Dermea padi (Alb. & Schwein.) Fr. (examined from NY, Austria) and Dermea prunastri (Pers.) Fr. are also found on Prunus: ascospore and ascus characters are similar and the characters that most clearly separate them are the size and shape of the conidia. In D. cerasi 1) the sexual fruitbodies, usually occurring in clusters, are relatively large, usually exceeding 0.1cm and often more than 0.15cm in diameter, 2) the conidial fruitbodies consist of fleshy stromata usually containing several cavities, and 3) the conidia are mostly 40-60 x 2.5-4.5 microns and sharply pointed at the ends. In Dermea padi, 1) the sexual fruitbodies are smaller, mostly about 0.1cm in diameter and mostly occurring singly, 2) the conidial fruitbodies consist of hard, horny, rostrate stromata, usually containing a single cavity, and 3) the conidia are similar in shape to those of D. cerasi but much smaller, 20-30 x 2.5-4.0 microns. In Dermea prunastri, 1) the sexual fruitbodies are usually in clusters, more brownish than those of the other 2 species, and usually less than 0.1cm in diameter, 2) the conidial fruitbodies are usually cespitose, long-rostrate, very hard and horny in consistency, and contain a single cavity, and 3) the conidia are 20-30 x 4-7 microns, about the same length as those of D. padi but thicker and not as sharply pointed at the ends. (Groves). See also SIMILAR section of Dermea balsamea.Habitat
emerging from bark on dead branches of Prunus cerasus (sour cherry) or Prunus avium (wild cherry) in compact groups, in spring, (Breitenbach for Switzerland), simple, or more often cespitose [in tufts], "on branches of various species of Prunus", (Seaver), erumpent, "gregarious, separate or sometimes cespitose, with few in a cluster", on Prunus species
Status Information
Synonyms
Synonyms and Alternate Names:
Asterostroma bicolor Ellis & Everh.
Asterostroma spiniferum Burt
Cenangium cerasi Fr.