Stropharia rugosoannulata
Scientific name: Stropharia rugosoannulata
Farlow:Murrill
Derivation of name: Rugos- means "wrinkle" or "fold" and
annul- means "ring" (annulus). Rugosoannulata describes
the wrinkled ring of this mushroom.
Synonyms:
Common name(s): Wine-cap; Burgundy-cap; Wine-cap
Stropharia; Wine-red Stropharia.
Phylum: Basidiomycota
Order: Agaricales
Family: Strophariaceae
Occurrence on wood substrate: Saprobic; scattered or in
groups on wood chips, mulch, gardens, woodland borders;
May through October.
Dimensions: Caps 5-15 cm wide; stipes 7-20 cm long and
1-3 cm thick.
Cap: Dry; smooth, cracked in age; reddish-brown to
reddish-purple, fading to pale brown or grayish-white.
Gills: Attached; white at first, turning grayish-lilac to purple-
black with maturity.
Spore print: Purple-brown to purple-black.
Stipe: Whitish, discoloring yellow to brown; with white
rhizomorphs at base.
Veil: White; radially striate or grooved on the upper surface,
deeply segmented below; forming a persistent, membranous
ring on the upper stalk.
Edibility: Edible.
Comments: Sometimes called King Stropharia and grown
commercially in Europe. Miller states that it is not found in
natural habitats in North America.
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More information at MushroomExpert.com:
Figure 1. Young wine-cap Stropharia
with intense coloration.
Photo © Pam Kaminski.
Figure 2. Grayish-lilac gills. Photo © William Roody.
Figure 3. Young, maturing, and older (with cracks on cap)
specimens of Stropharia rugosoannulata. Photo © John
Plischke III.
Figure 4. The ring is a prominent feature of this species.
Note the striate upper surface and the segmented lower
surface.
Figure 5. The striate or grooved upper side of the annulus.
Figure 6. The lower surface of the ring to the left and the
upper surface on the right.
Figure 7. Note the white rhizomorphs at the base of the stalk.
Figure 8. Time and sun take their toll on the wine-cap
Stropharia as these faded and cracked specimens show.
Note the all-so-common wood chip mulch habitat.