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Ganoderma tsugae.   Click a photo to enlarge it.   back to list

synonyms: Hemlock Varnish Shelf
Ganoderma curtisii Mushroom
Ref No: 7755
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Ganoderma tsugae Mushroom
Ref No: 7760
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location: North America
edibility: Inedible
fungus colour: Red or redish or pink
normal size: over 15cm
cap type: Other
stem type: Lateral, rudimentary or absent
flesh: Pore material cannot be seperated from flesh of the cap
spore colour: Light to dark brown
habitat: Grows on wood

Ganoderma tsugae Murr. Hemlock Varnish Shelf. Fruit body annual. Cap 5-25cm across, kidney- or fan-shaped; reddish to maroon or brownish, margin often white or yellow; surface smooth to wrinkled with a shiny, lacquered appearance. Tubes up to 1.5cm deep; pale purplish brown. Pores 5-6 per mm, circular to angular; surface cream-colored bruising yellowish or brownish. Stem up to 30-150 x 15-30mm, usually lateral; reddish brown to mahogany or almost black; surface has a highly varnished crust. Flesh up to 5cm thick, upper part soft and spongy, lower part corky when dried; creamy-colored to bud, with a darker layer next to tubes. Spores ellipsoid, blunt at one end, with thick double wall, 9-11 x 6-8. Deposit rust-brown. Hyphal structure dimitic; clamps present. Habitat singly or in clusters on dead or dying coniferous wood, especially hemlock and spruce. Found in eastern North America, California, and Arizona. Season May-November. Comment The similar Ganoderma lucidum (Curt. ex Fr.) Karsten grows on deciduous trees. Ganoderma curtisii (Berk.) Murr., which occurs in the South, is probably not a distinct species but a form of Ganoderma lucidum (see our picture with the younger specimens). It has a distinct, usually central stem, and the cap is pallid or bright ochre rather than red-brown.

Members' images and comments

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Kristina Trott (United States) - 04 November 2014

on dead hemlock trunk
Ganoderma tsugae
Richard Hale (United States) - 24 December 2012

G. tsugae, Blue Ridge Mtns. in Virginia
Ganoderma tsugae
Andrew Block (United States) - 18 November 2012

On eastern hemlock at Buckhorn Lake, Unadilla, Otsego Co., N.Y., on June 25, 2012.
Ganoderma tsugae
Andrew Block (United States) - 18 November 2012

On eastern hemlock at Buckhorn Lake, Unadilla, Otsego Co., N.Y., on June 25, 2012.
Ganoderma tsugae
Kristina Trott (United States) - 20 January 2012

Ganoderma tsugae
Tom Moreau (United States) - 25 June 2011

Another grouping of G. tsugae on the stump of a large downed hemlock in Manchester, CT
Ganoderma tsugae
Tom Moreau (United States) - 25 June 2011

Thanks for your site. Using it made ID'ing these mushrooms pretty straightforward. These G. tsugae were found on a hemlock trunk in Manchester, CT in an area where disease had struck many trees.
Ganoderma tsugae
Richard Wilkins (United States) - 28 August 2009

Growing in backyard where oak tree used to be. Long Branch, NJ, USA.
Ganoderma tsugae
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