Name: Ganoderma megaloma (Lév.) Bres.
Most Confident Observations:
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Copyright © 2016 Phil Yeager (gunchky)
Version: 13
Previous Version

First person to use this name on MO: Erlon Bailey


Rank: Species

Status: Accepted

Name: Ganoderma megaloma

ICN Identifier: missing

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Author: (Lév.) Bres.

Citation: Hedwigia 53: 53 (1913)

Deprecated Synonyms: Scindalma megaloma (Lév.) Kuntze, Elfvingia megaloma, Fomes leucophaeus, Polyporus leucophaeus, Ganoderma leucophaeum, Scindalma leucophaeum, Polyporus megaloma, Fomes megaloma, Fomes applanatus f. leucophaeus, Fomes applanatus var. leucophaeus


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Polyporales

Genus: Ganoderma

Notes on Taxonomy: [Edit]

Country (state) :
New York

Location details : USA, New York
Substrate details : trunk

Basionym :
Polyporus megaloma Lév., Annales des Sciences Naturelles Botanique 5: 128 (1846) [MB#199867]

-———- G. megaloma G. lobatum Fomes fasciatus
Pores per mm: 5 4-5 4-5
Pileus: milk-white to grey to dark brown; zonate yellowish-brown to reddish-brown to grayish-brown; subzonate grey to dark brown to black; strongly zonate
Pileus: very hard; crust inseparable woody; thinly crustose hard; crustose
Spores: 7-8 × 5-6; smooth 8-10 × 6-7; rough 12-14 × 4-4.5; smooth
Season: perennial annual perennial
Range: canada to northern alabama southeast to new york florida to north carolina, west to texas

Three similar species in the eastern U.S.

Brief Description: [See More | Edit]

Crust white, becoming brown, not separating, growing in temperate regions.

Spores smooth, 8-9 X 5


“it is near Polyporus applanatus in form, consistency and volume, but differs essentially in the color of the cap and the pores and especially in the presence of a wide sterile border circumscribing the tubes below.”

Elfvingia megaloma (Lév.) Murrill, Bull. Torrey Club 30: 300. 1903.

Pileus hard, woody, dimidiate, applanate, 6—15 X 8-30 X 1—4 cm.; surface milk-white to gray or umbrinous, glabrous, concentrically sulcate, encrusted, fasciate with obscure lines, conidia-bearing, usually brownish during the growing season from the covering of conidia; margin obtuse, broadly sterile, white or slightly cremeous, entire to undulate: context corky, usually rather hard, zonate, fulvous to bay, 5—10 mm. thick, thinner with age; tubes very evenly stratified, separated by thin layers of context, 5—10 mm. long each season, avellaneous to umbrinous within, mouths circular, 5 to a mm., whitish-stuffed when young, edges obtuse, entire, white or slightly yellowish to umbrinous, quickly changing color when bruised: spores ovoid, smooth or very slightly roughened, pale yellowish-brown, truncate at the base, 7-8 X 5-6 um.


HABITAT: Abundant on dead or diseased trunks or timber of most deciduous trees; also on conifers in certain sections.

DISTRIBUTION : Canada to the mountains of Alabama and west to California.

Exsiccati: Thum. Myc. Univ. I804 ; Rab.-Wint. Fungi Eur. 3736; Ellis, N. Am. Fungi 801 : Shear, N. Y. Fungi 34.

Descriptions: [Create]


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