Polyporus glomeratus Peck, Annual Report on the New York State Museum of Natural History 24: 78 (1872) [MB#172427]
Country (state) :
Location details : Indian Lake
Substrate details : prostate trunk of a maple tree, Acer saccharinum
Status : Type
Ryvarden, L. 2005. The genus Inonotus, a synopsis. Synopsis Fungorum. 21:1-149
Page number : 64
Remarks (internal) : Inonotus glomeratus does not fruit on living trees, but often produces sterile conks on Fagus and Acer. It produces large basidiocarps on stumps and fallen trees in which it continues to decay after death of the host.
Description type : Non-original description
Description : Inonotus glomeratus (Pk.) Murrill
Mycologia 12:18, 1920. – Polyporus glomeratus Pk., N.Y. State Mus. Ann. Rept. 24:78, 1872.
Basidiocarps effused-reflexed or resupinate, often effused for a distance of l-2 meters on fallen trees, pilei often imbricate, up to 4 × 10 × 1.5 cm, upper surface yellowish-brown, finely tomentose to glabrous, azonate, often covered with a bright golden yellow mass of basidiospores, margin concolorous or yellow to ochraceous, undulate, pore surface greyish brown, glancing, the pores angular, 3-5 per mm, with thin, tomentose dissepiments that become lacerate with age, context up to l cm thick, olden brown to dark yellowish brown, shiny on cut surfaces, fibrous-corky, faintly zonate, often with a hard, blackish upper layer, tube layer concolorous but separated by a darker layer, up to 7 mm thick, spore print bright golden yellow.
Hyphal system monomitic, generative hyphae pale yellowish brown in KOH, thin to thick-walled, rarely branched, 3-7 µm wide.
Setal hyphae dark reddish-brown in KOH, thick-walled, tapering to a point, unbranched, 7-12 µm in diam, setal hyphae more numerous and conspicuous in trama, projecting at dissepiment edges and often obliquely into the tubes, 250 to over 500 µm long, 10-15 µm in diam, clearly visible on broken tube surfaces under 30 x lens.
Hymenial setae abundant, subulate to ventricose, thick-walled, 16-28 × 5-9 µm.
Basidia ellipsoid, 4-sterigmate, 9-12 × 5-6 µm.
Basidiospores broadly ellipsoid to ovoid, pale yellowish, 5-7 × 4-5.5 µm.
Substrata. Mainly on Acer and Fagus not uncommon on Populus and occasionally on other hardwood genera.
Distribution. Common in hardwood forests of the north eastern U.S. and eastern Canada, rare in western North America.
Campbell, W.A.; Davidson, R.W. 1939. Poria andersonii and Polyporus glomeratus, two distinct heart-rotting fungi. Mycologia. 31(2):161-168
Page number : 165
Description type : Culture description
Description : Polyporus glomeratus
Petri-dish cultures: Growth very slow-forming in 7 days a mat 1-1.5 cm. or less in diameter. Mat usually closely appressed with
a thin, whitish to yellowish covering over the inoculum, and a colorless zone of advancing growth; often with a distinct brown staled area under the mat. An occasional culture forms a white, cottony or woolly mound over the inoculum with no trace of staling.
In 14 days mat 2-4 cm. in diameter, usually appressed, thin, indeterminate in color about the margin and with a brown staled area under the center (Fig. 2, D); surface hyphae somewhat velvety or compacted over the inoculum; white or colorless at margin to primuline-yellow, olive-ochre or dark-olive-buff at center. An occasional culture fails to develop the brown staled area and becomes raised, thick, felty, white at margin to olive-buff and deep-olive-buff at center (Fig. 2, C).
Submerged hyphae either hyaline, staining deeply with eosin or yellowish, non-staining, 2-5 µm in diameter, without clamps; in staled areas thick-walled, broken-up into irregular shapes often with short, connected, swollen cells (Fig. 1, F); fibrous hyphae brown, thick-walled, 1-5 µm in diameter; dark-brown, opaque, setal hyphae usually present in cultures 14 days old but sometimes lacking, 7-16 µm in diameter and 150-400 µm long (Fig. 1, G) .
Temperature relations: Optimum temperature for growth approximately 25° C.
Test tube cultures: In 14 days appearance of different cultures rather variable, either slow-growing, appressed, with dark-brown staled areas under the mat and with scant white to olive-ochre thin cottony, or velvety, superficial growth; or raised, thick woolly on slant to cottony on agar cylinder and lacking the staled area under the mat; white at margin to buffy brown on slant with a trace of olive-ochre; setae appearing as radiating streaks against the glass, visible with the naked eye and very prominent under a lens.
In 28 days mat darker, from old-gold to yellow-ochre and buckthorn-brown usually with dark-brown staled area extending beyond the margins of growth.
Flask cultures: On hard maple blocks in wide mouth flasks, P. glomeratus forms a luxuriant cottony mycelium, much heavier and more robust than on malt agar. Small abortive sporophores form in from 7 to 10 months. The fungus makes little growth on oak heartwood but develops a moderately heavy mycelium on the sapwood. Sporophore formation takes place in 6-8 months with fairly large, well-formed fruiting bodies, producing yellowish-green spores in abundance, formed on the top or sides of the oak blocks. The oak sapwood is well decayed but the heartwood is only slightly attacked.
Created: 2009-09-29 14:31:11 CDT (-0400) by Tom Volk (TomVolk)
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