Hirticlavula elegans J.H. Petersen & Læssøe, in Petersen et al., Karstenia 54(1): 2 (2014)
Basidiomata 800–1100 μm high, translucent white, with a 600–800 μm long and 40–60 μm thick, hairy stem abruptly widening into a 230–260 x 90–200 μm large, solid, fertile head. Dried material with a cream tinge and hardly collapsed. Hyphal structure monomitic, without clamps; hyphae in stem parallel, non-infl ated, 1–2 μm wide, more intertwined and gnarled at insertion point. Hairs straight, pointing upwards at an oblique angle, unbranched, slightly thickwalled, remotely septate, 150–250 × 1.5–2.5 μm (base) and 3–4.5 μm thick at the rounded ± clavate apex; cells 10–30 μm long. Basidia without clamps, cyanophilous, 14–22 × 3–5.5 μm, with four, curved and remarkably thin, 4–5 μm long sterigmata. Spores hyaline, cyanophilous or with a few cyanophilous particles inside, smooth, broadly ellipsoid, 4.5–6.5 × 3–4.2 μm, Q= 1.2–1.5, mean Q= 1.36 (n = 15), apiculus up to 0.8 μm long. Crystals not prominent.
Index fungorum number: IF808060
Notes: The basidiomata do not emerge from a sclerotium, but arise directly on bark or rarely wood from hard wood trees, two collections on Quercus, another on Salix, one on Corylus and one on undetermined hardwood.
Figure 1. Maximum likelihood tree inferred from a dataset of large subunit rDNA sequences showing the placement of Hirticlavula elegans among other clavarioid taxa. Support values are given above the branches as Bayesian posterior probability/bootstrap proportion. Accession numbers for sequences retrieved from GenBank are given following the sequence name.