Public Description of Hypholoma fasciculare (Huds.) P. Kumm.

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Name: Hypholoma fasciculare (Huds.) P. Kumm.
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Strophariaceae

General Description:

Cap: 2-5 cm; conical to convex at first, becoming broadly convex to flat; smooth; dry; bright sulfur yellow to greenish yellow when fresh, sometimes yellowish orange when young, often with a darker center; the margin sometimes with small partial veil fragments.

Gills: Attached to the stem or pulling away from it; sulfur yellow, becoming olive or greenish yellow, eventually dusted with spores and therefore spotted purplish brown to blackish (see third illustration); close or crowded.

Stem: 5-12 cm long; 3-10 mm thick; more or less equal, or tapering to base, bright yellow to tawny, developing rusty brown stains from the base upwards; bright yellow partial veil present in buttons (see the bottom illustration), soon disappearing or leaving a ring zone near the top.

Flesh: Thin, yellow.

Odor and Taste: Odor not distinctive; taste bitter.

Spore Print: Purple brown.

Spores: 6-8 × 3.5-5 µ; elliptical; smooth; with a pore. Pleurocystidia ventricose to mucronate, often with a long neck; with refractive contents; to 42 × 11 µ. Cheilocystidia fusoid-ventricose; to 32 × 10 µ.

Note: Underside of cap glows dull to bright green under UV-A LED flashlights


widely distributed


on decaying logs and stumps of hardwoods and conifers

Look Alikes:

Hypholoma subviride


Kuo, M. (2003, January). Hypholoma fasciculare. Retrieved from the MushroomExpert.Com Web site:


Hypholoma fasciculare (Huds.) P. Kumm., Führ. Pilzk. (Zwickau): 21, 72 (1871)

Sanctioning author:

Agaricus fascicularis Huds. 1778

Description author: walt sturgeon (Request Authorship Credit)
Description editors: Herbert Baker, Nathan Wilson, PinkNightmares

Created: 2009-10-06 03:22:28 BST (+0100) by Herbert Baker
Last modified: 2018-05-14 18:22:43 BST (+0100) by PinkNightmares
Viewed: 406 times, last viewed: 2019-12-19 13:36:49 GMT (+0000)