Public Description of Steccherinum ochraceum (Pers.) Gray

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Name: Steccherinum ochraceum (Pers.) Gray
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 Draft For Macrofungi Of The Pacific Northwest By Chaelthomas (Private)

Description status: Unreviewed

General Description:

Literature :
Eriksson, J.; Hjortstam, K.; Ryvarden, L. 1984. The Corticiaceae of North Europe. 7:1282-1449

Page number : 1396
Remarks (public) : Characteristic species due to the colour, the dense odontioid hymenium and the small spores. To the naked eye quite similar to Junghuhnia nitida, and in the field often confused with this species. Though easily delimited from most species of Junghuhnia by its odontioid-hymenium, it agrees in practically all respects with J. nitida and must be judged as closely related to this species. It should be noted that young fruitbodies of J. crustacea (type species of Junghuhnia) are irregularly hydnoid. Among the Nordic species its closest relative is S. robustius, but it is easily distinguished already in the field as S. robustius is much larger, more brightly coloured, and practically always totally resupinate. There is therefore no doubt that they are two clearly different taxa.

Description type : Non-original description

Description : Steccherinum ochraceum (Pers.:Fr.) S.F. Gray, Nat. Arrang. Br. Pl. 1 p. 651, 1821; Hydnum ochraceum Pers.: Fr., Syst. mycol. I p. 414, 1821.

Fruitbody effuse, usually small to medium sized, resupinate or with revolute margin, not distinctly pileate or seriate, reflexed part 0.5-1.5 cm with the upperside smooth or somewhat zonate, velutinous, hymenium odontioid, pale ochraceous to salmon-coloured, aculei more or less conical to almost cylindrical, as a rule simple, rarely branched, in younger fruitbodies scattered and about 3-5 per mm, in more developed ones slightly crowded, approximately 0.5-1 mm long, young aculei apically fimbriate, subiculum whitish, tough, in dried specimens 0.2-0.5 mm thick, margin usually distinct, felted, whitish to pale ochraceous, 0.5-1 mm wide, rhizomorphs normally not present.

Hyphal system dimitic, true generative hyphae thin-walled, more or less branched, 2.5-3.5 µm wide, with clamps, in the aculeal trama parallel together with skeletals or/and pseudocystidia, in the subiculum mixed with skeletals, which are thick-walled, 2-2.5 µm, without septa and clamps, and bound together by richly branched, clamped generative hyphae with thickened walls.
Cystidia (Pseudocystidia) numerous, especially in the aculei, but also occuring frequently in the hymenial layer between the aculei, strongly encrusted in the widened upper part, generally more than 100 µm long and with a width in the encrusted part of 7-10(-12) µm, blunt, projecting 20-30 µm above the basidia.
Basidia subclavate, thin-walled, 15-20 × 5 µm, with four sterigmata and a basal clamp.

Spores ellipsoid, smooth, thin-walled, 3.2-3.5(-4) x (2-)2.2-2.5 µm.
Habitat and distribution. On deciduous wood of various trees, Corylus, Fagus, Quercus, Tilia, Ulmus, in fertile and herb-rich biotopes, often in virgin deciduous woods. A southern species in N. Europe reaching Uppland in Sweden. In Norway mostly in the S.E. part in the vicinity of Oslo, but with a very isolated locality at Alta, Finnmark at 70°N. According to Christiansen not rare in Denmark, but not yet reported from Finland where it can be expected at least in the S.E. part.

Description author: Erlon (Request Authorship Credit)

Created: 2015-03-08 20:20:03 -03 (-0300) by Erlon (Herbert Baker)
Last modified: 2015-03-08 20:20:03 -03 (-0300) by Erlon (Herbert Baker)
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