E-Flora BC: Electronic Atlas of the Flora of British Columbia

Tricholoma apium Jul. Schaeff.
scented knight
Tricholomataceae

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi
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Distribution of Tricholoma apium
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Species Information

Summary:
features include whitish cap that often discolors greenish yellow-brown, white to yellowish gills, stem colored similarly to cap and often narrowing downwards, strong odor of celery, and small, nearly round spores; description from Breitenbach(3) is entitled "Tricholoma cf. apium J. Schaeff." and the remarks say that the collection differs from those described in the literature primarily by the rarity of 4-spored basidia and also by the larger spores probably because of the smaller number; Tricholoma apium found in BC with specimens at Pacific Forestry Center and University of British Columbia (Paul Kroeger, pers. comm.), and WA with voucher collection at University of Washington (Brandon Matheny, pers. comm.), Bessette(5) says also reported from MI, MA
Cap:
4-8cm across, irregularly twisted, margin weakly involute [inrolled]; white, then often discoloring completely yellow-greenish to green-brown; tomentous, (Moser), 5-13cm across, convex to +/- depressed, often irregular and flexuous [wavy]; whitish when young, discoloring yellowish and finally becoming dark olive brown; margin +/- sulcate, velvety matte, smooth or cracked, (Hansen), 4-9cm across, convex becoming expanded and undulating, margin incurved for a long time; whitish when young, later ocher-brownish to olive-brownish, darker toward center, paler at margin; dry, dull, finely tomentose, increasingly areolate [cracked like dried mud], (Breitenbach)
Flesh:
white, (Moser), hard (Hansen), thick in the center; white, dingy white when old, (Breitenbach)
Gills:
white, when old with yellowish gleam, (Moser), whitish to yellowish (Hansen), "arcuate-adnate and sometimes subdecurrent as a small tooth", 100-160 reaching stem, narrow, 5-11 subgills between each pair of neighboring gills; cream-white to yellowish white, (Breitenbach)
Stem:
whitish with fine scales, these yellowing or browning, (Moser), 3-5cm x 1.5-2cm, often short and stout; colored as cap, discoloring somewhat yellow to brown; smooth to fibrillose scaly, (Hansen), 4-6cm x 1-2cm, cylindric to conic, narrowing toward base, solid, firm; whitish; dry, sometimes transversely fibrillose-scaly at top, "increasingly ocher-yellowish to ocher-brownish squamose toward the base", (Breitenbach)
Veil:
[no ring or ring zone]
Odor:
of celery, (Moser), "strong, reminiscent of fennel, celery, or aniseed", (Hansen), strongly like celery or like Lactarius helvus, (Breitenbach), strong, like celery or somewhat curry-like (like Lactarius camphoratus or L. helvus), (Bessette), others say f
Taste:
mild, (Moser, Hansen), mild, somewhat spicy, (Breitenbach), "mild or a bit farinaceous or spicy" (Bessette)
Microscopic spores:
spores 3.5-5 x 3-4 microns, oval to nearly round; "cuticular hyphae uniformly incrusted", (Hansen), spores 2.5-4 microns, (Moser), spores 4.4-6 x 4.1-5.3 microns, nearly round, smooth, iodine-negative, colorless, with droplets; basidia 1-2-3(4)-spored, 22-33 x 5-6.5 microns, narrowly clavate, without basal clamp connection; pleurocystidia and cheilocystidia not seen; cap cuticle of irregular to slightly parallel hyphae 4-12 microns wide, "occasional hyphal ends exserted, sometimes in clusters, brown-pigmented", septa without clamp connections, (Breitenbach)
Spore deposit:
white according to literature (Breitenbach)

Habitat / Range

especially with pines, (Moser), in oligotrophic Pinus forests (Hansen), single to gregarious, in coniferous forests under Pinus (pine) and Picea (spruce), prefers dry, sandy habitats, (Breitenbach), fall (Buczacki)

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

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Species References

Moser(1), Hansen, L.(2), Breitenbach(3) (as Tricholoma cf. apium), Buczacki(1)*, Bessette(5)*

References for the fungi

General References