Observation 160565: Irpex lacteus (Fr.) Fr.

When: 2014-02-28

Collection location: Victoria Beach, Manitoba, Canada [Click for map]

Who: Chris Hay (hayfield)

Specimen available

September 20, 1971
Victoria Beach
bracket fungus
F P Ralston

Several species of Steccherinum are listed in the Manitoba & Saskatchewan list from Bisby et al. Any good resources to distinguish (i.e. available keys)?

Two more sticks are included that seem to be covered with something else (posted as separate observation, but see pic).

The above-mentioned extra two sticks pic never showed up with the original observation post. They are apparently something else anyway. See:

Species Lists


cue card is 3″ × 5″ (7.6cm x 12.7cm)
cue card is 3″ × 5″ (7.6cm x 12.7cm)

Proposed Names

28% (1)
Recognized by sight
72% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Teeth versus pores
By: Patrick R. Leacock (MycoGuide)
2014-03-02 18:25:24 CST (-0600)

Steccherinum is a toothed fungus. The teeth are all separate and rounded. A hand lens helps to see this. There are several polypores like Irpex and Trichaptum where the pores grow out jagged and look toothy. But if you look carefully straight into that lower surface you’ll see that the “teeth” are flat and joined together at the base into a pore or irregular pore pattern.

By: Chris Hay (hayfield)
2014-03-02 16:20:27 CST (-0600)

For future reference, how can I distinguish Irpex lacteus from Steccherinum?

All four photos are Irpex
By: Patrick R. Leacock (MycoGuide)
2014-02-28 23:44:04 CST (-0600)

Irpex lacteus is a common polypore with toothy jagged pores.

Created: 2014-02-28 17:25:59 CST (-0600)
Last modified: 2014-03-02 16:08:22 CST (-0600)
Viewed: 38 times, last viewed: 2018-06-13 07:02:45 CDT (-0500)
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