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Xerocomellus chrysenteron (Bull.) Šutara 2008

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Xerocomellus chrysenteron (Bull.) Šutara, Czech Mycol. 60 49 (2008)
Xerocomellus chrysenteron (Bull.) Šutara 2008

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Recorded in error
New Zealand
Political Region
It is likley most records refer to the similar X. cisalpinus. [JAC]

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(Bull.) Šutara
Bull.
Šutara
2008
49
ICN
species
Xerocomellus chrysenteron

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chrysenteron

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COLLECTIONS EXAMINED: Under (1) Quercus robur, Canterbury, Christchurch, Hagley Park, Mar 1966. R.F.R. McN., 25084; Otago, Palmerston, Pleasant Valley, Mar 1966, R.F.R. McN., 25086; (2) Q. robur and Fagus sylvatica, Hagley Park, Mar 1966, R.F.R. McN., 25083.
PILEUS: convex when young, becoming plano-convex to applanate at maturity, 4-8 cm diam., dry, subglabrous, felted or subtomentose, coffee brown, chestnut brown, yellow-brown or greyish fawn, irregularly creviced at maturity, crevices pink to red; cuticle a trichodermium composed of erect, septate, often roughened hyphae 5.5-10 µm diam., with pallid brown contents; margin entire, HYMENOPHORE: tubes to 10mm long, excavated around apex of stipe, sulphur yellow at first, becoming greenish yellow at maturity; pores concolorous with tubes, irregularly angular, 0.75-1.5 mm diam.; bluing where damaged. STIPE: 3.5-8 cm long, equal or more often tapering basally, 7-18 mm diam., solid, fibrous, dry, slightly longitudinally grooved, pallid yellow with scarlet or crimson streaks particularly at base; flesh red basally; annulus absent. SPORES: spore print olive brown (Orange-Citrine); spores melleous, subfusiform, 11.7-14.5-(17.2) X 4.1-5.4 µm, smooth. HYMENIUM: basidia hyaline, clavate, 34-9 X 9.2-13 µm, 4-spored; cystidia abundant, scattered, hyaline to pallid melleous, thin-walled, ventricose-rostrate to narrowly lageniform, 45-70 X 8-10.5 µm. HYMENOPHORAL TRAMA: bilateral, of the Phylloporus subtype; clamp connections absent. CONTEXT OF PILEUS: white to pallid yellow, pink to reddish immediately beneath cuticle, rapidly bluing on exposure to air. TASTE: mild. SMELL: not distinctive.
HABITAT : Gregarious under introduced broadleaved trees.
ILLUSTRATIONS: Wakefield and Dennis, Common British Fungi pi. 88, fig. 2.1950.

Xerocomus chrysenteron is an introduced species, which is widely distributed throughout temperate regions of the northern hemisphere. In its native environment it occurs under both coniferous and broadleaved trees. There are conflicting reports in the literature as to the edibility of this species and it appears that it is not highly esteemed as an edible fungus.

X. chrysenteron may be distinguished by the dry, irregularly creviced pileus which shows a red or pink colour in the crevices, red streaked stipe, and hymenophore which rapidly turns blue where damaged. It has not previously been recorded from New Zealand.

TYPE LOCALITY: France.

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taxonomic status
Molecular studies of many collections under this name are all morphological variants of X. cisalpinus. Consequently the status as present in NZ is open to question. [JAC]

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327ddc10-4b6e-4f73-b14e-db10376d2f8c
scientific name
Names_Fungi
15 October 2012
20 December 2013
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