Name: Tylopilus sordidus
Author: (Frost) A.H. Sm. & Thiers
Citation: Mycologia 60(4): 950 (1968)
Preferred Synonyms:Porphyrellus sordidus (Frost) Snell
Cap: 2-5 cm; convex, becoming broadly convex or nearly flat in age; dry; finely velvety when young, typically cracking and splitting with maturity, exposing whitish flesh that may stain pinkish or bluish; dark brown to grayish, often with bluish tints by maturity, at least near the margin.
Pore Surface: Whitish to yellowish at first, becoming brown to reddish brown; bruising blue, then reddish brown; pores circular, 1-2 per mm; tubes to 1 cm deep.
Stem: 4-8 cm long; up to 1 cm thick; more or less equal; colored like the cap; not reticulate.
Flesh: White; staining pinkish and/or blue when sliced.
Odor and Taste: Taste mild; odor not distinctive or slightly bleachlike.
Chemical Reactions: Ammonia dark purple to black on cap; yellowish to orangish on flesh. KOH pinkish, orangish, reddish, or negative on cap and flesh. Iron salts negative on cap; bluish to grenish or negative on flesh.
Spore Print: Brown to reddish brown or purplish brown.
Microscopic Features: Spores 10-17 × 4-8 µ; subfusoid to elliptical; smooth. Cystidia to about 75 × 20 µ; mostly fusoid-ventricose; contents often coagulated or grainy. Pileipellis a cutis of mostly erect, cylindric, septate elements 8-18 µ wide, yellowish in KOH; often with cystidioid apices.
I am treating Tylopilus cyaneotinctus and Tylopilus fumosipes as probable synonyms.
Created: 2007-06-19 02:54:00 CDT (-0400) by Nathan Wilson (nathan)
Last modified: 2020-07-05 17:44:19 CDT (-0400) by I. G. Safonov (IGSafonov)
Viewed: 417 times, last viewed: 2020-09-18 09:02:27 CDT (-0400)