Hebeloma islandicum

Ciri dan struktur

Cap 2.0–4.0 cm in diameter, convex to umbonate, margin involute when young, smooth, tacky when moist, not hygrophanous, uniformly colored or bicolored, at center dark olive buff to yellowish brown, at margin cream, innately fibrillose, sometimes with remnants of universal veil. Lamellae initially pale clay, in age often brownish, emarginate, maximum depth 5 mm, number of lamellae {L} 40–50, droplets visible with naked eye, with white fimbriate edge. Stem 1.7–2.5 × 0.4–0.6 {median} × 0.5–0.7 {base} cm, stem Q 3.4–5.5, whitish pale, finely flocculose-tomentose in the entire length with clavate base. Context firm, stem interior stuffed, later hollow, flesh usually discoloring from base. Smell raphanoid. Taste mild or slightly bitter. Spore deposit not recorded. Spores amygdaloid, often limoniform, papillate, on ave. 11.0–12.5 × 6.5–7.0 µm, ave. Q = 1.7–1.8, yellow to yellow brown, guttulate, at most weakly ornamented ((O1) O2), perispore not or somewhat loosening (P0 P1), weakly to rather strongly dextrinoid (D2 D3). Basidia 28–40 × 6–9 µm, ave. Q = 3.7–4.9, mostly four-spored. Cheilocystidia irregular, a mixture of clavate-stipitate, clavate-lageniform, ventricose and slenderly clavate, with occasional characters, geniculate, septate (sometimes clamped) or rostrate, on ave. 44–55 × 6.5–8.5 (apex) × 4–5 (middle) × 4–8 (base) µm, ratios A/M = 1.63–1.98, A/B = 1.04–1.85, B/M = 1.05–1.73. Epicutis an ixocutis, up to 120 µm thick (measured from exsiccata), maximum hyphae width 6 µm, some encrusted, trama elements beneath subcutis ellipsoid, cylindrical, thick sausage-shaped up to 20 µm wide.

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Rujukan: [1]

Pengukuran mengikuti objek, spesimen atau kultur, dan metode yang disebutkan sumber. Baca uraian asli untuk konteks lengkap.

Habitat dan peran ekologis

Only one record, from southern Greenland. Until recently only known from the type from the north-western, arctic part of Iceland. As discussed above, two more collections have been discovered from herbarium exsiccata at O; both, collected in Norway at above 60°N at altitudes of more than 1000 m (Eberhardt et al. in press). The above record from Greenland is from an arctic area and extends the distribution to North America. It is seemingly a very rare species. Although T.B. investigated the area around Paamiut regularly for 20 years, he only collected it once. All four known collections appear to have been associated with Salix herbacea in a wet snowbed.

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Habitat atau konteks temuan

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Substrat

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Peran atau konteks

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Reproduksi

Cap 2.0–4.0 cm in diameter, convex to umbonate, margin involute when young, smooth, tacky when moist, not hygrophanous, uniformly colored or bicolored, at center dark olive buff to yellowish brown, at margin cream, innately fibrillose, sometimes with remnants of universal veil. Lamellae initially pale clay, in age often brownish, emarginate, maximum depth 5 mm, number of lamellae {L} 40–50, droplets visible with naked eye, with white fimbriate edge. Stem 1.7–2.5 × 0.4–0.6 {median} × 0.5–0.7 {base} cm, stem Q 3.4–5.5, whitish pale, finely flocculose-tomentose in the entire length with clavate base. Context firm, stem interior stuffed, later hollow, flesh usually discoloring from base. Smell raphanoid.

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Rujukan: [1]

Catatan identitas dan cakupan

• Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
• Preserve original treatment localities, hosts and substrate scope. Materials examined describe documented specimens, not the full global range.
• Impor dan terjemahan otomatis belum diperiksa editorial per profil. Struktur reproduktif yang disebutkan tidak membuktikan seluruh siklus hidup diketahui.
• Pengukuran pada uraian mengikuti spesimen, kultur, dan metode sumber; angka tidak diperluas ke semua populasi.

Melihat dengan konteks

Hebeloma islandicum A TB19.81, photograph T. Borgen B distribution of cited collections; C spores ×1600 and D cheilocystidia ×1000 of TB86.291 in Melzer’s reagent. Scale bars: 5 µm; microphotographs H.K.J. Beker.

Jenis

Pelat ilmiah

Kredit

Ursula Eberhardt, Henry J. Beker, Torbjørn Borgen, Henning Knudsen, Nicole Schütz, Steen A. Elborne

Lisensi

CC BY 4.0

Sumber media

Buka entri sumber

Gambar menunjukkan objek menurut identifikasi sumber, bukan verifikasi independen spesimen oleh Fungi. Tidak ada skala baru yang ditambahkan.

Sumber profil

1. [1] A survey of Hebeloma (Hymenogastraceae) in Greenland — Hebeloma islandicumBagian sumber: PMC8076164_section_201
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY 4.0 · Eberhardt U, Beker HJ, Borgen T, Knudsen H, Schütz N, Elborne SA.
2. [2] Catalogue of Life Base2026-09-11 — Hebeloma islandicumBagian sumber: ColDP NameUsage.tsv ID 3JXQD; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Hebeloma islandicumBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY 4.0 · Ursula Eberhardt, Henry J. Beker, Torbjørn Borgen, Henning Knudsen, Nicole Schütz, Steen A. Elborne