Floccularia luteovirens
scaly yellow Armillaria
Agaricaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
scaly yellow Armillaria
Agaricaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Species Information
Summary:
Features include 1) medium to large size, 2) a whitish to straw-yellow dry cap with conspicuous flattened bright yellow or darker scales arranged in concentric circles, 3) whitish then lemon yellow gills, 4) a dry white stem with shaggy yellow scales in concentric circles, 5) a thick yellowish cottony ring, 6) growth on the ground under aspen or in mixed woods, 7) white spore deposit, and 8) amyloid spores.
Gills:
"sinuate, close, broad; whitish then lemon yellow", (Phillips), adnate becoming emarginate, close, moderately broad; edges even, (Smith(15)), quite close; whitish to pale lemon, (Courtecuisse)
Stem:
5-12.5cm x 1.5-2.5cm, sometimes with thick bulb; white and smooth above ring, whitish with shaggy yellowish scales in lower part, (Phillips), 4-9cm x 0.5-0.7cm, widening evenly downward; silky and smooth above the ring, coarsely scaly below ring from innate, long, flat, recurved [upcurved] scales, somewhat glabrescent [becoming somewhat bald] when old, (Smith(15)), up to 10cm long and 2cm wide, whitish; fleecy under a fairly ill-defined ring zone, (Courtecuisse)
Veil:
ring thick, yellowish, cottony on upper stem, (Phillips), superior submembranous ring, (Smith(15))
Odor:
not distinctive (Smith(15))
Taste:
mild (Phillips), not distinctive (Smith(15))
Microscopic spores:
spores 6-8 x 4-5 microns, elliptic, smooth, weakly amyloid, (Phillips), spores 6.5-8 x 4-5 microns, elliptic to oblong, smooth, weakly amyloid; basidia 4-spored; pleurocystidia and cheilocystidia not seen; gill trama parallel; cap trama homogeneous or cells over surface somewhat collapsed and subgelatinous when old; clamp connections present, (Smith(15))
Spore deposit:
white (Phillips)
Notes:
Smith(41) observed this species from WA, OR, and WY. There is a BC collection by P. Kroeger at the University of British Columbia.
EDIBILITY
unknown (Phillips)
Habitat and Range
SIMILAR SPECIES
Floccularia albolanaripes is less scaly and has a brownish center to the cap. "In the field this fungus [Armillaria luteovirens] is not always easily distinguished from A. albolanaripes Atk., especially if faded fruiting bodies of both are encountered ... the amyloid spores of A. luteovirens enable it to be readily distinguished. In most of the Wyoming collections the bright yellow of the typical form of A. luteovirens had almost disappeared, being visible only in the incurved edges of the pilei." (Smith(41) with Latin names in italics).Habitat
on ground under aspen and in mixed woods (Phillips), in Oregon in an area dominated by conifers but alder and maple present (Smith(15)), "short turf, wood pasture on calcareous soil", (Courtecuisse for Europe)
Status Information
Synonyms
Synonyms and Alternate Names:
Floccularia straminea (Krombh.) Pouzar var. americana (Mitchel & A.H.