E-Flora BC: Electronic Atlas of the Flora of British Columbia

Albatrellus flettii Morse ex Pouzar
blue-capped polypore

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Michael Beug  Email the photographer   (Photo ID #17543)

E-Flora BC Static Map
Distribution of Albatrellus flettii
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Species Information

Features include blue, blue-gray or blue-green caps developing pale orange, or ochraceous patches when older, white pore layer, central or off-center stem that is white to pale bluish gray, and growth on ground under conifers. Ginns(1) says that "Although 10 collections of Albatrellus flettii were seen from Washington, no confirmed specimens of Albatrellus confluens are known from the state, although it is reported by Gilbertson and Ryvarden (1986). Perhaps in western North America, Albatrellus flettii is more common than Albatrellus confluens, or perhaps in this area there is only one species, which differs from Albatrellus confluens elsewhere in having the pileus when young with blue tints, and when old, either lacking the blue or mottled with blue. The rare morphological differences in basidiomes indicate that these are sister species and may be subspecies." Audet(1) proposed the name Albatrellopsis flettii (Morse ex Pouzar) Audet, Mycotaxon 111: 440 (2010). Albatrellus flettii has been found in BC, WA, OR, ID, AB, AK, CA, NM, and WY, (Ginns).
5-20cm or more, convex becoming flat or centrally depressed; "blue to blue-gray or sometimes blue-green, but developing ochraceous, salmon, or rusty stains in age"; dry; margin incurved at first, often lobed or wavy, (Arora), blue gray when young, developing pale orange patches, retaining the blue color in parts protected parts where caps overlap, (Ginns), greenish blue to dingy ocher, (Lincoff), up to 20cm, single or confluent (growing fused to other caps), circular to kidney-shaped; greenish blue when fresh, becoming dingy when old, and gradually becoming salmon pink to brick red in the herbarium; bald to minutely tomentose, smooth, becoming rugose [wrinkled] to areolate [cracked like dried mud] on drying; margin wavy and incurved, (Gilbertson)
thick, firm, rather tough; white, (Arora), up to 1.5cm thick, "brittle and breaking cleanly when fresh, shattering or crumbling readily when dried", white to cream, drying pinkish buff, (Gilbertson)
1-4 per mm, decurrent, often becoming torn; white, often developing salmon or ochraceous stains when old or with drying; tube layer 0.1-0.7cm thick, (Arora), white to very pale cream, (Ginns), 2-4 per mm, circular to angular, decurrent, with thick walls that become thin and torn when old; "at first white, becoming bluish then pinkish buff and finally brick red on drying"; tube layer up to 0.4cm thick, white to cream colored, drying pinkish buff and slowly to brick red, (Gilbertson)
5-15cm x (1)1.5-4cm, central or off-center, equal or wider at either end, solid, firm; white to pale bluish gray, or aging dingy ochraceous to reddish, (Arora), "short, stout, typically a basal lump giving rise to several caps that are confluent", solid, firm; white, or with pale blue patches and/or faint blue gray bloom, (Ginns), up to 14cm x 4cm, central to lateral, simple or branching at the base; drying pinkish buff; bald to finely tomentose, (Gilbertson)
of fresh field mushrooms (Ginns), mealy (Lincoff)
mealy (Lincoff)
spores 4-5 x 3-3.5 microns, oval to elliptic, smooth, inamyloid, colorless; basidia 4-spored, 20-28 x 5.5-7 microns, clavate, with basal clamp connection; cystidia absent; hyphae monomitic, hyphae of context mostly 4-9 microns wide, some inflated to 15 microns wide, colorless in KOH, thin-walled, with occasional branching, with simple septa and frequent conspicuous clamp connections, hyphae of trama more uniformly 2.5-5 microns, thin-walled, with clamp connections, gloeoplerous hyphae also present in context and trama, 4-9 microns wide, highly refractive in Melzer's reagent, with occasional clamp connections, (Gilbertson), spores (3.8)4.0-4.6(5.0) x (2.8)3.0-3.4(3.6) microns, smooth, weakly amyloid, colorless, thin-walled; basidia 17-27 x 6-7, clavate, nearly cylindric, some with stalk; cap sections "in KOH bleaching or becoming pinkish brown, in water with distinctly blue granules that varied from cylindrical 6 x 1-2 microns to nearly square 8 microns", (Ginns), spores 3.5-4 x 2.5-3 microns, elliptic to nearly round, smooth, weakly amyloid, (Arora)
Spore Deposit:
white (Arora)

Habitat / Range

annual; "scattered to gregarious or in fused clusters on ground in mixed woods and under conifers", (Arora), on soil in coniferous forest systems, (Gilbertson)

Synonyms and Alternate Names

Polyporus flettii Morse

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links


yes (Arora)

Additional Photo Sources

Related Databases

Species References

Gilbertson(1), Ginns(1), Arora(1)*, Castellano(2)*, Lincoff(2)*, AroraPocket*, Audet(1) (as Albatrellopsis flettii)

References for the fungi

General References