E-Flora BC: Electronic Atlas of the Flora of British Columbia

Dacrymyces capitatus Schwein.
no common name
Dacrymycetaceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Adolf Ceska  Email the photographer   (Photo ID #18947)

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Distribution of Dacrymyces capitatus
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Species Information

Summary:
Dacrymyces capitatus produces tiny, soft, gelatinous, cartilaginous, cushion-shaped to top-shaped or plate-shaped fruiting bodies that are pale yellow to somewhat translucent, have a short stem with a rooting base, and grow on hardwood or rarely conifers. According to McNabb (1973) it is recognized by its more or less stipitate [stemmed] habit, its typically convoluted cap at maturity, the absence of clamp connections, and the 3-septate spores with thin or slightly thickened walls and septa, (hairs at the base of the cap also being relatively constant). Arrhytidia involuta (Schwein.) Coker is considered a synonym but note that G.W. Martin found conspicuous clamp connections. Distribution includes BC, WA, OR, ID, AB, ON, PQ, AZ, GA, IA, KS, LA, MA, MI, MS, NC, NJ, NY, and PA, (Ginns), Finland, France, Netherlands, United Kingdom, USSR, and New Zealand, (McNabb), Costa Rica, Mexico, Panama, Argentina, Brazil, and Colombia, (Lowy), Czechoslovakia, South Africa, Tunisia, and Australia, (Reid), and Estonia (Raitviir).
Fruiting body:
0.05-1cm, low pulvinate [cushion-shaped] to plate-shaped; pale yellow, in part somewhat translucent, cartilaginous, gelatinous, soft; smooth, sometimes white-pruinose; short substantial stem somewhat rooting, gradually merging into upper part, (Breitenbac
Microscopic:
spores (8)10-13 x 4-5.5 microns, elliptic-cylindric, slightly curved, smooth, inamyloid, colorless, thin-walled, with 3 septa when mature, also conidia cut off from spores 4.5-6 x 4-5, nearly round; basidia 25-30 x 3-3.5 microns, fork-shaped; cystidia not seen; hyphae 2-3 microns wide, thin-walled to thick-walled, in part finely incrusted, no clamp connections, (Breitenbach), spores 11-17 x 3.5-6(7) microns, curved-cylindric, orange in mass, "typically thin-walled, occasionally walls and septa slightly thickened, tinted, apiculate"; germination by colorless, spherical conidia and/or germ tubes; probasidia 25-52(60) x 3-5.5 microns, cylindric-subclavate, with basal septa, becoming bifurcate; hymenium consisting of basidia and occasionally simple, cylindric dikaryophyses; internal hyphae thin-walled, typically roughened, occasionally smooth, septate, without clamp connections, hyphae of stem and rooting base heavily and irregularly gelatinized, hairs on stem and base of cap simple, cylindric, septate, thin-walled or thick-walled, often with terminal cells slightly inflated, (McNabb), spores 14-18.5 x 5-7 microns, allantoid [curved sausage-shaped], early 1-3 septate, orange-yellow in mass, pale yellow by transmitted light; internal hyphae smooth, with conspicuous open clamp connections, (Martin)

Habitat / Range

dead wood with and without bark, branches, conifers and hardwoods, causes a uniform brown rot or a brown pocket rot, (Ginns), gregarious on dead wood of hardwoods, more rarely conifers, (Breitenbach for Europe), all year (Buczacki)

Synonyms and Alternate Names

Arrhytidia involuta (Schwein.) Coker
Dacrymyces involutus Schwein.
Dacrymyces stipitatus (Bourdot & Galzin) Neuhoff
Dacryomitra nuda (Berk. & Broome) Pat.

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Additional Photo Sources

Related Databases

Species References

Breitenbach(2)* (as Dacrymyces capitata), McNabb(8), Reid(1), Martin, G.W.(1) (as Arrhytidia involuta), Raitviir(1) (as Arrhytidia involuta), Lowy(2) (as Arrhytidia involuta), Ginns(5) , Buczacki(1)*

References for the fungi

General References