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Trichaptum biforme

Scientific name:   Trichaptum biforme (Fr. in Kl.)
Derivation of name:  Trichaptum means “with clinging
hairs”; biforme means “with two forms or stages” in reference
to the pore surface which can be either poroid or toothlike.
Synonymy:   Polyporus biformis Fr. in Kl., Polyporus
 Fr.; Trichaptum pargamenum (Fr.) G. Cunn.;
Hirschioporus pergamenus (Fr.) Bondartsev & Singer
Common names:   Violet-toothed polypore.
Phylum:   Basidiomycota
Order:  Polyporales
Family:   Polyporaceae

Occurrence on wood substrate:  Saprobic; solitary to
overlapping clusters on dead deciduous wood, rarely on
conifers; year-round.
Dimensions:  Caps 1-7.5 cm wide and up to 3 mm thick.
Upper surface: White to grayish or brownish, greenish if
covered by algae; margin often purplish; zonate; hairy.
Pore surface: Purplish at first, fading to buff or brownish but
usually retaining violet tints near margin; poroid at first with
pores 2-5 per mm, becoming toothlike in age.
Edibility: Inedible.
Comments: A very colorful polypore when young. It can
occur in great numbers on the substrate. Compare to
Trichaptum abietinum which occurs mostly on conifer
wood and is generally smaller.

Ttiny black clubs can often be found on the
upper surface of older Trichaptum biforme fruitbodies.
The clubs are Phaeocalicium polyporaeum, a saprobic
ascomycete often associated with this polypore.
Photo © John Plischke III.

very young specimen of violet-toothed


Wildmentor Wildmentor