Observation 75856: Hydnum rufescens Pers.
When: 2011-08-31
No herbarium specimen

Notes: Growing attached to well rotted log in damp leaf litter. Growing among Silver Birch with nearby English Oak.

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167476
Note the non-decurrent spines and orange-brown pileus

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Do you know Hydnum ellipsosporum?
By: Andreas (AK_CCM)
2011-09-14 13:01:54 PDT (-0700)

Hydnum ellipsosporum Ostrow & Beenken is very similar to H. rufescens Pers. This species has usually smaller basidiocarps and ellipsoid spores with a length up to 11 µm and more. H. rufescens has more rounded, broadly oval spores with a length up to 9 µm. The authors note the following spore sizes: 6,5-9 × 5,5-7 µm (H. rufescens) and 9-11 × 6-7,5 µm (H. ellipsosporum).

Source: OSTROW, H. & L. BEENKEN (2004): Hydnum ellipsosporum spec. nov. (Basidiomycetes, Cantharellales) – a double of Hydnum rufeseens Fr. Z.Mykol. 70(2): 137-156.

Summary: The new species Hydnum ellipsosporum is described from Germany. It differs from the very similar Hydnum rufescens mainly by the shape and length of the spores. The hitherto known distribution is provided. Aids for determination and a key for the European species of Hydnum are given. Furthermore, the species rank of Hydnum repandum and Hydnum rufescens is confirmed by macroscopical differences and DNA-analysis. Using sequences of the ITS 1, 5.8S, and ITS2 regions ofthe nuclear ribosomal DNA of Hydnum albidum, H. repandum, H. rufeseens and H. ellipsosporum cladistic analysis result in only one tree. The three species of the H.-repandum-complex are closely related. Hydnum ellipsosporum and H. rufeseens are sister species. Spore sizes and types of basidia are analysed for one sampie per species and discussed.

The article is in german language, but if you’re interested, I could send you the paper (PDF; 7,41 MB).

Created: 2011-09-08 23:14:18 PDT (-0700)
Last modified: 2011-09-14 13:32:35 PDT (-0700)
Viewed: 179 times, last viewed: 2016-10-27 15:24:29 PDT (-0700)
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