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Summary: Pholiota aurivella group is recognized by yellow to orange viscid cap with large spot-like darker scales, scaly stem, and brown spore deposit; of the Pholiota aurivella group, 90% in PNW are P. limonella and most of the rest P. aurivella, while P. adiposa is almost unknown from North America, differentiation is by spore size; to complicate matters, Pholiota aurivella (Batsch: Fr.) Kummer non sensu Batsch and Pholiota adiposa sensu Fr. are both given by Breitenbach(4) as synonyms of Pholiota cerifera (P. Karst.) P. Karst., and they give P. adiposa (Batsch: Fr.) P. Kumm. sensu auct. non Fr. as a synonym of Pholiota jahnii Tjall. & Bas; Smith(3) examined collections from BC, WA, OR, ID, and also ON, QC, AK, CA, CO, ME, MI, NC, NM, TN, UT, Netherlands, Switzerland, United Kingdom, also reported from IL
Cap: 4-15cm across, "bell-shaped to convex with a broad umbo"; ocher-orange to tawny; sticky to slimy with large flattened spot-like scales that may disappear or become somewhat sticky when wet, (Phillips), 4-16cm across, bell-shaped to convex, often broadly umbonate; when young ochraceous orange to tawny, when mature more uniformly tawny; "at first covered with large appressed spot-like scales which may disappear and when wet may become more or less gelatinous, cuticle viscid or gelatinous", (Smith)
Stem: 5-8cm x 0.5-1.5cm, central or off-center, solid; yellowish to yellow-brown; dry, cottony above the ring, hairy and with downcurved scales toward the base, (Phillips), 5-8cm x 0.5-1.5cm, equal, central or eccentric [off-center], solid; yellowish or yellowish brown; dry, floccose above the ring, fibrillose below ring and increasingly scaly downward, the scales fibrillose and recurved [upcurved], (Smith)
Veil: white partial veil leaves evanescent [fleeting] ring or zone on upper stem, (Phillips)
Odor: sweet (Phillips), mild (Miller)
Taste: slight (Phillips)
Microscopic spores: spores 7-9.5(11) x 4.5-6 microns, broadly elliptic in face view, in side view broadly elliptic to obscurely bean-shaped, smooth, germ pore distinct but apex not truly truncate, color in KOH dull tawny, in Melzer's reagent reddish cinnamon, wall about 0.25 microns thick; basidia 4-spored, 24-28(30) microns, colorless to yellowish in KOH and Melzer's reagent, narrowly clavate, some with colorless refractive amorphous particles, some with rusty brown content in KOH (clearing somewhat on standing), and some colorless and homogeneous; pleurocystidia 30-45 x 4-7 microns, mostly fusoid or branched once or twice near apex (rarely appearing as having 3-4 coarse sterigmata, 3-4 microns at base), content colorless to partially filled with solidified colloidal material or with refractive particles dark brown in Melzer's reagent (but not with characteristic refractive inclusion as in chrysocystidia), cheilocystidia 26-35 x 5-10 microns, subfusoid with obtuse apex to fusoid-ventricose and obtuse, or versiform, wall at times thick enough to show as double line; caulocystidia none; clamp connections present, (Smith), spores 8.5-10.2 x 5-6.5 microns, (Scates(2) following Farr et al.)
Spore deposit: rusty brownish (Phillips)
Habitat / Range
in clusters on living trunks and logs of hardwoods and conifers; June to November, (Phillips), on trunks and logs of hardwoods and conifers; June to November, (Smith), summer, fall
Pholiota limonella has spores 6-7.5 x 4-5 microns, and P. adiposa 5-6 x 3-4 microns; Pholiota connata has yellow cap, thin viscid layer over the stem below the veil line, growth in connate fascicles, and spores 7-9 x 3.5-4.5 microns, (Smith); Pholiota filamentosa has yellowish stem that becomes rusty brown in lower part and has a flanged base and thick somewhat persistent fibrillose ring in at least some fruitbodies of a cluster, grows on conifer wood, and has spores 6-7.5(8) x 3.8-4.2 microns, (Smith); Pholiota hiemalis has large flat gelatinous scales on cap that finally disintegrate into dark brown discolorations that are not scale-like, pallid young gills with bright yellow edges, gelatinous as well as dry patches and scales on stem, conifer log habitat, and spores 7-9(10) x 4-4.5 microns, (Smith); Pholiota aurivelloides, found at least Colorado, Wyoming, and New Mexico, has broader spores than P. aurivella (8-11(1.5) x 6-7(8) microns) and different pleurocystidia
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2019. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
18/11/2019 6:58:05 AM
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