Observation 20471: Austroboletus occidentalis Watling

Duplicate specimens on deposit in PERTH and NY (Halling #8839).

Macroscopic description from fresh material (color codes from Methuen):

Pileus 5.5-9.5 cm broad, convex, tacky-sticky to viscid, tomentose to matted tomentose, mottled brown (6D-E8), soon grayish orange (5B5) and then pale yellow (4A3-3A3), with extensive sterile appendiculate margin with pale pinkish to white colors, soon disappearing. Flesh white, unchanging, with mild odor and taste. Tubes adnexed, white at first, becoming pale porphyry pinkish, staining pale brownish. Stipe 10-11 cm long, 1.4-2 cm broad, equal and then tapering near base, dry, lacerate reticulate, white, developing deep yellow to yellowish brown stains in situ with age, white at base, with interior solid then somewhat pithy.


In situ, ambient light.
With SEM, the spores of A. occidentalis possess the sinuous ridges in the plage area of spores.

Proposed Names

94% (3)
Eye3 Eyes3
Used references: R. Watling & N.M. Gregory. 1986. Proc. Royal Soc. Queensland 97:97-128. See also K. Syme, Fungimap Newsletter 18, November 2002.
Based on microscopic features: Spores are very finely pitted when viewed with proper Light Microscope optics.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2009-04-22 10:26:22 CDT (-0500)
Last modified: 2009-04-22 10:26:22 CDT (-0500)
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