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Dendrocollybia racemosa (Pers. ) R. H. Petersen and Redhead
Life   Fungi   Basidiomycota   Tricholomataceae   Dendrocollybia

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

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Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa

Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
Dendrocollybia racemosa
© Copyright Malcolm Storey 2011-2118 · 3
Dendrocollybia racemosa
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California Fungi—Dendrocollybia racemosa
(Photo: © Michael Wood)

Dendrocollybia racemosa (Pers.) R.H. Petersen & S. A. Redhead
Mycol. Res. 105(2): 169.

Common Name: none

Basionym: Agaricus racemosus Pers.

Synonyms: Collybia racemosa (Pers.) Quélet; Microcollybia racemosa (Pers.) Lennox

  • Pileus

    Cap 0.7-1.5 cm in diameter, broadly conic, becoming convex, eventually plano-convex, the disc slightly umbonate; (in some specimens the cap may be greatly reduced or absent); margin decurved, becoming plane to raised, entire, eroded or wavy; surface dull brown, glabrous at the disc, elsewhere appressed silky-fibrillose, grey-brown, paler towards the margin, sometimes faintly zonate; context thin, less than 1.0 mm thick, grey; odor, not distinctive; taste mild.

  • Lamellae

    Gills adnexed to notched, close, moderately broad, dingy greyish-tan; lamellulae up to 3-seried.

  • Stipe

    Stipe 4.0-6.0 cm long, 0.5-1.0 mm thick, more or less equal, pliant, hollow to stuffed; surface of apex dull tan-brown, pruinose, darker brown below, covered with scattered lighter colored fibrils, short side branches with swollen tips projecting from the lower two-thirds of the stipe, the stipe often well buried in the substrate.

  • Spores

    Sexual spores 4.0-4.5 x 2.0-2.5 µm, ellipsoid, thin-walled, hilar appendage conspicuous, non-amyloid; spore print white. Asexual spores 10.0-15.5 x 3-4 µm, narrowly ellipsoid to oblong, contents granular, non-amyloid.

  • Habitat

    Solitary or in small groups growing from a grain-like sclerotium on the decayed remains of decayed mushrooms, or in duff of mixed hardwood-conifer woods; fruiting from late fall to mid-winter.

  • Edibility

    Unknown, insignificant.

  • Comments

    This easily overlooked small, greyish mushroom is recognized by a stipe with many short, side branches. The branches which end in swollen tips produce asexual spores, presumably a hedge to the sexual spores of the cap. In some specimens asexual reproduction predominates with the cap either greatly reduced or absent. A cousin, Collybia tuberosa , is also small and inconspicuous. Like Dendrocollybia racemosa , it grows from a sclerotium on the remains of decayed mushrooms, but can be distinguished by a whitish cap, and the lack of lateral stipe branches.

  • References

    Bas, C., Kyper, T.W., Noordeloos, M.E. & Vellinga, E.C. (1995). Flora Agaricina Neerlandica -- Critical monographs on the families of agarics and boleti occuring in the Netherlands. Volume 3. Tricholomataceae. A. A. Balkema: Rotterdam, Netherlands. 183 p.
    Castellano, M.A., Cázares, E., Fondrick, B. & Dreisbach, T. (2003). Handbook to additional fungal species of special concern in the Northwest Forest Plan (Gen. Tech Rep. PNW-GTR-572). U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: Portland, OR. 144 p. ( PDF )
    Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
    Hughes, K.W., Petersen, R.H., Johnson, J.E., Moncalvo, J.-M. , Vilgalys, R., Redhead, S.A., Thomas, T. & McGhee, L.A. (2001). Infragenic phylogeny of Collybia s. str. based on sequences of ribosomal ITS and LSU regions. Mycol. Res. 105(2): 164-172.
    Lennox, J.W. (1979). Collybioid genera in the Pacific Northwest. Mycotaxon 9(1): 117-231.
    Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
    Siegel, N., Vellinga, E.C., Schwarz, C., Castellano, M.A. & Ikeda, D. (2019). A Field Guide to the Rare Fungi of California's National Forests. Bookmobile: Minneapolis, MN. 313 p. ( PDF )

  • Other Descriptions and Photos Main Photo
    • Wikipedia: Dendrocollybia (D & CP)
    • Jens H. Petersen: Collybia racemosa (CP)
    • Arora (1986): p. 213 (D), p. 212 (P) [as Collybia racemosa ]
    • Smith (1975): sp. 109 (D & CP) [as Collybia racemosa ]

    (D=Description; I=Illustration; P=Photo; CP=Color Photo)

The Fungi of California
Copyright © 2000-2019 Michael Wood & Fred Stevens
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Dendrocollybia+racemosa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Fungi ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Dendrocollybia+racemosa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Fungi

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Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Dendrocollybia racemosa%" and (lifeform != "specimen_tag" OR lifeform != "Fungi") ORDER BY taxon

Click on the thumbnail to see an enlargement

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet
ID: 0000 0000 1209 1168 [detail]
© 2009 Ron Wolf

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet
ID: 0000 0000 1209 1169 [detail]
© 2009 Ron Wolf

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet
ID: 0000 0000 1209 3048 [detail]
© 2009 Ron Wolf

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet. Branched Collybia
ID: 0000 0000 1111 2050 [detail]
© 2011 Ron Wolf

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet. Branched Collybia
ID: 0000 0000 1111 2051 [detail]
© 2011 Ron Wolf

Dendrocollybia racemosa
Dendrocollybia racemosa
Branched Shanklet. Branched Collybia
ID: 0000 0000 1111 2052 [detail]
© 2011 Ron Wolf

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