Observation 13844: Armillaria (Fr.) Staude

When: 2008-11-08

Collection location: Silver Spring, Montgomery Co., Maryland, USA [Click for map]

Who: John S. Harper (jsharper)

Specimen available

Collected 11-8-08.

In a grass yard. Believed to be from underground roots of dead maple cut 2 years ago.

Not entirely ringless – slight annulus on some, and on some just a cottony appearance, but not as strongly ringed as pictures as A, mellia are. (Added observation 11-11-08: Also found some samples in this location with more distinct annulus ring, and very young specimens with cottony/cobweblike veil.)

Instead of dark short hairs at center of pileus, there were whitish fibrils on most. But some have a more typical darker appearance at center of cap. (Added observation on 11-11-08: as the specimens in the field aged, the hairs on the cap did darken to be more typical of A. mellia.)

Somewhat hygrophanous appearance.

Pleasant mushroomy odor. Taste also pleasant, very slightly astringent.

Spore print: white

Species Lists


Cespitose clusters – stipe 2-3 inches, cap 1-2.5 inches. Stipe width .25 inches. Other co-located specimens with shorter stipes (1 inch), wider stipe (.5 inch).
Slightly descending gills, note slight annulus. Other co-located specimens varying with some more clear annulus, some with no apparent annulus at all, and some immature specifmen with cottony cobweb over gills.
white fibrils at center of cap. Darkened with age.
Underside, cottony fill in stipe, note cottony area on stipe where ring might be
In grass, burried roots of removed maple
No veil on young specimen

Proposed Names

-23% (3)
Recognized by sight
Used references: Phillips, R. Mushrooms and 0ther Fungi of North America
60% (2)
Recognized by sight: I’m pretty sure that’s too much ring for A. tabescens, but I agree that A. mellea is unlikely. Perhaps our ‘local’ Armillaria expert will weigh in.

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
No one has commented yet.