Ganoderma sessile: Historical Description and Identification Issues
From my observation on Mushroom Observer (https://mushroomobserver.org/obs/616012) click on About this taxon -> On MO: About Ganoderma sessile Murrill to get this under General Description which is under the images:
General Description See More
‘Sessile Ganoderma’
7. Ganoderma sessile Murrill, Bull. Torrey Club 29: 604. 1902.
A variable plant [sic] with wrinkled varnished cap and acute margin, found on decaying deciduous trees.
Pileus corky to woody, dimidiate Ainsworth & Bisby's (2)(of a pileus), without a stalk and semi-circular), sessile Ainsworth & Bisby's having no stem or stipitate Ainsworth & Bisby's stalked, imbricate Ainsworth & Bisby's (of pilei, scales, squamules, etc.), partly covering one another like the tiles of a roof. or connate Ainsworth & Bisby's joined by growth at times, conchate Ainsworth & Bisby's like a bivalve shell to fan-shaped, thickest behind, thin at the margin, 5-15 X 7-25 X 1-3 cm.; surface glabrous Ainsworth & Bisby's smooth, not hairy, laccate Ainsworth & Bisby's polished, varnished, shining, shining, radiate-rugose Ainsworth & Bisby's radiate - spreading from a centre rugose - wrinkled, concentrically sulcate Ainsworth & Bisby's grooved, yellow to reddish-chestnut, at length opaque, dark-brown usually marked near the margin Agaricus of North America page 26 edge with alternating bay and tawny zones; margin usually very thin and acute Ainsworth & Bisby's pointed; less than a right angle, often curved downward, often undulate Ainsworth & Bisby's wavy, rarely becoming truncate Ainsworth & Bisby's ending abruptly; as though with the end cut off horizontally, white, at length concolorous Ainsworth & Bisby's of one colour: context soft-corky or woody, radiate-fibrous Ainsworth & Bisby's radiate - spreading from a centre, concentrically banded, ochraceous-fulvous Google AI An "ochraceous-fulvous mushroom" refers to fungi with colors in the brownish-orange to reddish-brown spectrum (ochraceous = yellowish-brown, fulvous = reddish-yellow/tawny); tubes 0.5-2 cm. long, 3-5 to a mm., brown within, mouths circular or angular, white or grayish-brown, edges thin, entire Ainsworth & Bisby's (of edges of lamellae, etc.), not torn, having no teeth.: spores ovoid, obtuse Ainsworth & Bisby's (1) rounded or blunt; at the summit, attenuate Ainsworth & Bisby's narrowed and truncate at the base, verrucose Ainsworth & Bisby's having small rounded processes or 'warts', yellowish-brown, 9-11 X 6—8u: stipe laterally Ainsworth & Bisby's at the side attached, usually ascending, irregularly cylindrical, 1-4 X 0.5-1.5 cm., resembling the pileus in color, surface and substance, often obsolete Ainsworth & Bisby's(1) (of organs or parts), rudimentary or absent; (20 (of terms), no longer in use.
TYPE LOCALITY ; New York.
HABITAT : On decaying wood of deciduous trees.
DISTRIBUTION : Connecticut to Missouri, Alabama, and Louisiana.
EXSICCATI : Ellis & Ev. Fungi Columb. 202.
https://books.google.com/...
(WRJ full link: https://www.google.com/books/edition/North_American_Flora/8-1ZAAAAYAAJ?hl=en&newbks=1&gbpv=1&dq=Ganoderma+sessile+margin+acute&pg=PA120&printsec=frontcover which is from the Library of Princeton University North American Flora Volume 9 (Agaricales) Polyporaceae-Agaricaceae Published by The New York Botanical Garden 1907-1916
- this is relevant section of this book "North American Flora" which is included verbatim in Mushroom Observer:
7. Ganoderma sessile Murrill, Bull. Torrey Club 29: 604. 1902.
A variable plant with wrinkled varnished cap and acute margin, found on decaying deciduous trees. Pileus corky to woody, dimidiate, sessile or stipitate, imbricate or connate at times, conchate to fanshaped, thickest behind, thin at the margin, 5-15 × 7-25 × 1-3 cm.; surface glabrous, laccate, shining, radiate-rugose, concentrically sulcate, yellow to reddishchestnut, at length opaque, dark-brown usually marked near the margin with alternating bay and tawny zones; margin usually very thin and acute, often curved downward, often undulate, rarely becoming truncate, white, at length concolorous: context soft-corky or woody, radiate-fibrous, concentrically banded, ochraceous-fulvous; tubes 0.5-2 cm. long, 3-5 to a mm., brown within, mouths circular or angular, white or grayish-brown, edges thin, entire: spores ovoid, obtuse at the summit, attenuate and truncate at the base, verrucose, yellowish-brown, 9-11 × 6-8μ: stipe laterally attached, usually ascending, irregularly cylindrical, 1-4×0.5-1.5 cm., resembling the pileus in color, surface and substance, often obsolete.
TYPE LOCALITY ; New York.
HABITAT : On decaying wood of deciduous trees.
DISTRIBUTION : Connecticut to Missouri, Alabama, and Louisiana.
EXSICCATI : Ellis & Ev. Fungi Columb. 202.
------------ End of Google Book ------------
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Pileus margin acute
Growth pattern: dimidiate, sessile, imbricate, connate. Sometimes stipitate when growing from the root zone.
Host: hardwood; oak, red maple.
Frequent on diseased/wounded trunks, dead stumps. Also found at the root zone.
http://www.cybertruffle.org.uk/...
http://books.google.com/...
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Polypores and Similar Fungi of Eastern and Central North America Alan E. Bessette, Dianna G. Smith and Arleen R. Bessette published 2021
P 158: Ganoderma sessile Murrill Macroscopic Features: FRUITBODY 3-25 cm wide, semicircular or fan-to kidney-shaped or irregular, usually sessile but sometimes with a rudimentary or short stalk. UPPER SURFACE roughened and uneven, often with a few zones or shallowly sulcate, covered with a think, shiny crust and appearing varnished, glabrous, dark red to reddish brown, becoming ochraceous outward, with a broad whit margin. FERTILE SURFACE white at first, becoming yellowish then dull brown in age, staining brown when bruised. PORES more or less circular, 4-6 per mm, tubes up to 2 cm deep. STALK when present, 2-6 cm long, 1-3 cm thick, lateral or subcentral, often twisted, varnished, shiny dark reddish brown. FLESH up to 3 cm thick, leathery to corky when fresh, becoming tough and rigid when dry, often zonate when thick, typically brown but sometimes yellowish; odor and taste not distinctive. Microscopic Features: Spores 9-12 X 5.5-8 um, ellipsoid, with a truncate apex and germ pore; wall two-layered with interwall pillars, smooth but appearing roughened, brown, hyphal system trimitic, clamp connections present. Occurrence Solitary, in groups, or in overlapping clusters on stumps, roots, or on the ground at the base of standing broadleaf trees; widely distributed in the Northeast, North Central, South regions; year-round. Edibility Inedible. Remarks: Opportunistic pathogen, causing a white rot. The epirhe sessile means "attached without a stalk."