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

Amylocystis lapponica (Romell) Singer
no common name

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

Introduction to the Macrofungi

© Michael Beug  Email the photographer   (Photo ID #65515)

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Distribution of Amylocystis lapponica
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Species Information

{See also Amylocystis lapponica, Leptoporus mollis, Postia fragilis Table.} Features include a light buff bracket-like or shelf-like fruitbody with a tomentose to bristly cap that becomes dark reddish brown on bruising or drying, white angular pores that become dark reddish brown when old, growth on conifer wood, and microscopic characters including amyloid hyphae and cystidia. The description is derived from Gilbertson(1).

Amylocystis lapponica has been found in BC, WA, OR, ID, AB, MB, ON, PQ, AK, AZ, CA, CO, MI, MN, MT, NH, NY, UT, VT, and WY, (Gilbertson).
up to 15cm wide, bracket-like or bent outward from pore surface flat on wood to form shelf-like cap, semicircular, margin rounded to sharp; light buff, becoming dark reddish brown on bruising or drying, margin colored as rest of cap; tomentose to hispid (with bristles), azonate
up to 2cm thick, corky; azonate, pale buff, sometimes with a darker layer near the upper surface
3-4 per mm, angular; white when fresh, becoming dark reddish brown when old, bruising or drying; tube layer up to 0.4cm thick, slightly darker than the flesh; tube end walls thin, becoming torn
slightly bitter, anise-like
spores 8-11 x 2.5-3.5 microns, cylindric, smooth, colorless, inamyloid; basidia 4-spored, 20-25 x 7-8 microns, with basal clamp connection; cystidia abundant, 30-45 x 5-9 microns, projecting to 15 microns, fusiform, mostly thick-walled, moderately to strongly amyloid, some incrusted at apex; hyphal system monomitic, generative hyphae 4-10 microns wide, with abundant clamp connections, mostly thick-walled with a narrow and sinuous lumen, colorless in KOH, weakly to strongly amyloid, tramal hyphae similar, 3-4.5 microns wide, amyloid

Habitat / Range

annual; on conifers, forming a brown cubical rot, and functioning as a decomposer of fallen trees, particularly common on spruce logs and its fruiting bodies develop near melting snow early in spring

Synonyms and Alternate Names

Lycoperdon gemmatum Batsch
Polyporus lapponicus Romell

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Additional Photo Sources

Related Databases

Species References

Gilbertson(1), Ginns(25), Ginns(28)*, Siegel(2)*

References for the fungi

General References