Name: Piptoporus betulinus (Bull.) P. Karst.
Most Confident Observations:
Copyright © 2011 Ringelnatz
Copyright © 2013 Gerhard Koller (Gerhard)
Copyright © 2009 amadej trnkoczy (amadej)
Copyright © 2011 Dmitriy Bochkov (convallaria)
Version: 12
Previous Version

First person to use this name on MO: Nathan Wilson
Editors: walt sturgeon, Erlon, Dmitriy Bochkov, Rocky Houghtby, Django Grootmyers


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Polyporales

Family: Fomitopsidaceae

Notes on Taxonomy: [Edit]

Basionym :
Boletus betulinus Bull., Herbier de la France 7: t. 312 (1787) [MB#210846]

Brief Description:

The fruiting body of Piptoporus betulinus has a pileus that is 1 1/8-10" (3-25.5 cm) wide with a shell, hoof, or kidney shape. The color is at first pale white, then acquiring a brownish tinge, and finally smoky grey with age. The surface of the cap often tears or breaks up into scales or patches as it ages. The most distinct feature of the fruiting body is the inrolled margin (most obvious at maturity), which remains as a rim around the pore surface.

The pore surface or hymenium is indented or depressed from the margin. When young the hymenium is cream colored and smooth, becoming pale brown to yellowish brown and jagged with age. The pores are circular to angular and there are 3-5/mm.

Although sometimes lacking, the stalk is lateral and up to 2 3/8" (6 cm), with a reddish-brown or brown color. The flesh is 3/8-2" (1-5 cm) thick, white, tough-fibrous, and corky.

Piptoporus betulinus is also known as the Birch conk or razor strop fungus. It was formerly called Polyporus betulinus.

Descriptions: [Create]


Add Comment
By: Erlon (Herbert Baker)
2017-05-04 11:02:47 EDT (-0400)

Piptoporus should not be used any longer. It is obsolete.

Created: 2007-06-19 02:47:31 EDT (-0400) by Nathan Wilson (nathan)
Last modified: 2017-05-04 11:02:47 EDT (-0400) by Erlon (Herbert Baker)
Viewed: 1404 times, last viewed: 2018-08-16 04:35:06 EDT (-0400)
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