Name: Clavulina J. Schröt.
Most Confident Observations:
Copyright © 2013 Dave W (Dave W)
Copyright © 2018 Huafang
Copyright © 2014 Christian (Christian Schwarz)
Copyright © 2008 Daniel B. Wheeler (Tuberale)
Version: 3
Previous Version 

First person to use this name on MO: Alan Rockefeller
Editors: Tim Sage, Joseph D. Cohen


Rank: Genus

Status: Accepted

Name: Clavulina

ICN Identifier: missing

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Author: J. Schröt.

Citation: Krypt.-Fl. Schlesien (Breslau) 3.1(25–32): 442 (1888) 1889

Notes on Taxonomy: [Edit]

Clavulina copioso-cystidiata
Fruit bodies up to 3.5 × 1 cm, sparingly but finely branched, gregarious to densely cespitose (and then perhaps abortive or remaining juvenile), whitish when young, slowly becoming mouse-grey to brownishgrey (“light drab”, “drab”, “hair-brown”, “dusky”) with ivory-coloured stipe and apices. Stipe 8 × 3 mm, irregular in cross section, inserted nakedly, but involving a small ball of substrate. Branches 2-3, flattened, occasionally palmate, twisted; axils rounded to acute. Apices cristate or irregularly acerose to irregularly lobed or gnarled, not dichotomous. Odour and taste negligible.
On sandy soil under Leptospermum.
Tramal hyphae of branches hyaline, thin-walled, inflated up to 9 µm diam., clamped, free, generally parallel, often agglutinated in juxtaposition to subhymenium. Hymenium thickening; basidia 42-47 × 7 µm, clamped, subclavate to cylindrical, opalescent to multiguttulate when mature; sterigmata 2, curveddivergent; post-partal septation common but not invariable, the proximal portion remaining refringent under phase contrast. Cystidia (Fig. 48) plentiful, scattered, 50-85 × 10-12 µm, narrowly sphaeropedunculate, emergent up to 40 µm, aseptate, the apical portion refringent under phase contrast, the more proximal part hyaline.
Spores (Fig. 49) 7.6-9.0 × 6.1-7.2 µm (E =1.11-1.25; Em =1.19; Lm = 8.02 µm), subglobose to broadly ellipsoid, thin-walled, opalescent when mature; hilar appendix small, papillate.
COMMENTARY: Macroscopically, fruit bodies are similar to small individuals of Clavulina leveillei, under which name they were gathered. Microscopically, however, spores and basidia are considerably smaller, cystidia are shorter, more broadly clavate, aseptate, refringent and more plentiful. When dried, fruit bodies sometimes take on a somewhat cartilaginous appearance, indicative of the agglutinating substance present in some tissues also being present on the fruit body exterior.
At x60, the hymenium appears pruinose from the scattered cystidia, which are not in clusters as in Clavulina geoglossoides and other taxa. The branch apices appear sterile, but the hymenium is otherwise amphigenous.


On sandy soil under Leptospermum: New Zealand

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