Name: Inocutis dryophila (Berk.) Fiasson & Niemelä
Most Confident Observations:
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Version: 7
Previous Version 

First person to use this name on MO: Herbert Baker
Editors: Darvin DeShazer


Rank: Species

Status: Accepted

Name: Inocutis dryophila

Author: (Berk.) Fiasson & Niemelä

Citation: Karstenia 24: 25 (1984) [MB#106198]

Deprecated Synonyms: Inonotus dryophilus (Berk.) Murrill, Polyporus corruscans, Xanthochrous dryophilus, Polyporus dryophilus, Inonotus corruscans, Xanthochrous corruscans, Polyporus friesii Klotzsch, Linnaea 8: 487 (1833), Xanthochrous rheades subsp. corruscans, Inocutis dryophilus


Domain: Eukarya

Kingdom: Fungi

Class: Agaricomycetes

Order: Hymenochaetales

Family: Hymenochaetaceae

Genus: Inocutis

Notes on Taxonomy: [Edit]

Collected by : Lea
Collection date : 05/09/1844
Country (state) :

Location details : Waynesville
Substrate details : living red-oak
Status : Type

Brief Description:

Sometimes confused with Inonotus dryadeus which fruits at the rootzone/base of trees.Inocutis dryophilus fruits higher up the tree or on logs. Inocutis is a sister genus to Inonotus.

Literature :
Ryvarden, L. 2005. The genus Inonotus, a synopsis. Synopsis Fungorum. 21:1-149

Page number : 50

Remarks (internal) : The granular core, pigmented spores, lack of setae, and occurrence on oaks are distinctive characters. Inonotus rheades is similar but decays living aspen on which it produces relative­ly small basidiocarps. The basidiospores of I. rheades are also smaller than those of I. dryophilus.
Description type : Non-original description
Description : Inonotus dryophilus (Berk.) Murrill,
Bull. Torrey Bot. Club 31:597, 1904. – Polyporus dryophilus Berk., London J. Bot. 6:321, 1847. – Polyporus corruscans Fr. Vet. Akad. Forhand. 1851, p. 52, 1851.

Basidiocarps annual, sessile on trunks of living oaks, pilei usually solitary, ungulate, up to 11 × 19 × 9 cm, upper surface buff to reddish brown, tomentose or glabrous, often zonate, becoming rimose, margin rounded, concolorous, pore surface at first buff, becoming dark reddish-brown, rough, the pores angular, l-3 per mm, with thin dissepiments that become lacerate, context consisting mostly of a hard granular core of intermixed brown and whitish mycelium, with a thin layer of fibrous, yellowish-brown tissue on the surface between the core and the tube layer, the granular core up to 8 cm thick, the fibrous portion up to 3 cm thick, tube layer with tubes at first whitish within, becoming concolorous with the context, up to 3 cm thick.

Hyphal system monomitic, hyphae from the fibrous portion mostly thin-walled, pale yellowish, simple-septate, with infrequent branching, 5-10 µm in diam, some frequently branched hyphae also present, hyphae of granular core of two types, some thick-walled, branched, contorted and breaking into small sclerid-like fragments, 4-15 µm diam, others hyaline, septate, thin-walled, mostly 3-4 µm in diam but some with inflated portions up to 15 µm in diam, tramal hyphae pale yellowish, thin-walled, simple-sep­tate, 4-6 µm in diam, also some gloeoplerous hyphae with clavate tips, 4-8 µm diam.

Basidia clavate or with a swollen base, 4-sterigmate, 17-20 × 6-8 µm.
Setae or other sterile hymenial elements absent.

Basidiospores ellipsoid to ovoid, brownish, becoming thick­-walled, 6-8 × 4.5-6 µm.

Substrata. Primarily on living oaks, also reported on a few other hardwoods such as Eucalyptus and Fraxinus.

Distribution. South-central Europe to southern Fennoscandia and circumboreal in the North Temperate Zone through Asia to North America.

Literature :
Nobles, M.K. 1948. Studies in forest pathology VI. Identification of cultures of wood-rotting fungi. Canadian Journal of Research. 26(3):281-431

Page number : 362
Remarks (internal) : The colors exhibited by cultures of Polyporus dryophilus may be pale, so it seems advisable to include it in both" “colored” and “not colored” sections of the key. This possible variation in color, along with two growth rates and the color changes in agar, which necessitates listing under bleached and colored sections, results in P. dryophilus appearing in eight places in the key. The color and topography of its cultures are characteristic, and the succession of color changes in the agar, from light to dark brown and finally bleached, is unique, so that it should be possible to separate it readily from other species having identical key patterns.

Description type : Culture description
Description : Polyporus dryophilus Berk.
Cultural characters: (PI. IX., Fig. 10; Pl. X, Figs. 28 to 30).
Growth characters. Growth moderately rapid to slow, plates covered in four to five weeks. Advancing zone even, raised aerial mycelium extending to limit of growth. Mat white (two weeks) to “colonial buff” (6.0Y8.5 /5.5) and “chamois” (2.0Y7.5/5.8) (three weeks), and “honey yellow” (2.0Y6.7/6.2) (six weeks); outer zone raised to top of Petri dish, cottony to cottony-woolly, very loosely arranged, the color all in this mycelium; inner zone around inoculum somewhat collapsed, woolly, white or pale. Reverse below newer growth “honey yellow” (2.0Y6.7/6.2) to “bister” (4.5YR3.0/3.0), subsequently bleached, so that in cultures six weeks old agar below oldest part is bleached pure white, below newer growth is “auburn” (3.0YR3.0/4.0) to “bister” (4.5YR3.0/3.0) or nearly black. Odor none. On gallic and tannic acid agars diffusion zones strong, diameter 1.5-2.2 cm. on both media.
Hyphal characters. Advancing zone: hyphae hyaline, with simple septa 3.0-7.5 µm diameter. Aerial mycelium: hyphae as in advancing zone, occasionally with walls yellow to brown. Submerged mycelium: (a) hyphae as in advancing zone; (b) crystals numerous, small, octahedral.
Type of rot: white pocket rot of broad-leaved trees, usually Quercus spp.
Descriptions of cultural characters: Bailey (4), Davidson, Campbell, and Blaisdell (64), Davidson, Campbell, and Vaughn (67), Long and Harsch (98).

Literature :
Berkeley, M.J. 1847. Decades of fungi. Decade XII-XIV. Ohio fungi. London Journal of Botany. 6:312-326

Page number : 321
Description type : Original description
Description : 129. Polyporus (Anodermei) dryophilus, n. sp.
Pileo crasso rigido ungulato scabroso inaequabili incano-ferrugineo-flavo; contextu cinnamomeo; hymenio cinnamomeo fusco; poris parvis intus rhabarbarinis.
On living red-oak, Waynesville, Sept. 5, 1844. T. G. Lea, Esq.
Pilei subimbricate 4 inches broad, 3 inches long, ungulate, unequal, rough with scabrous points, formed by innate pubescence, of a ferruginous yellow, but subdued by a thin white film.
Substance fibrous, hard, cinnamon.
Pores externally cinnamon brown, within ferruginous-yellow, about 1/80 of an inch broad, angular, with thin dissepimerits.
Nearly allied to Polyporus dryadens, but a smaller mole rigid species, with larger differently coloured pores. It has also much resemblance to P. gilvus.

Descriptions: [Create]


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Created: 2009-10-11 14:51:30 CDT (-0400) by Herbert Baker
Last modified: 2018-05-26 01:41:49 CDT (-0400) by Herbert Baker
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