Cortinarius infractiflavus

Ciri dan struktur

Cortinarius infractiflavus bears a convex, somewhat sticky and hygrophanous pileus measuring 20–80 mm in diameter, its margin initially inrolled. The cap surface is glutinous when moist and changes appearance as it dries, ranging in colour from yellow-brown to nearly yellow with an olivaceous-grey marginal zone. The lamellae are distinctively paler than those of typical C. infractus, adopting an olivaceous-brown hue. The stipe measures 25–70 mm in length and 10–16 mm in thickness, swelling to a bulb 12–20 mm wide at the base. Young specimens display a yellowish cortina that later weathers to greyish-brown with an olivaceous cast and fine fibrils. Remnants of the veil are whitish. The flesh (context) is pale olive-buff to tilleul buff, with marbled greyish tones in the stipe, and emits a very faint cedar-wood or fungoid odour. The taste is only mildly bitter, markedly less so than that of C. infractus. Microscopically, basidiospores measure 6.7–8.5 × 5.4–6.1 μm (mean 7.6 × 5.4 μm), varying from drop-shaped to nearly spherical or lightly almond-shaped, with a length-to-width ratio of 1.25–1.6 (mean 1.4). The basidia are clavate, four-spored and measure 30–32 × 7.5–8 μm. The gill trama comprises hyphae 5–7 (–8) μm wide—colourless to pale yellowish-grey—with the central layer containing hyphae up to 12 μm wide. The pileipellis is formed by a dense layer of hyphae 5.5–8 μm wide, with pale yellow walls and clamp connections. Chemical spot tests on the flesh and gill surfaces are negative with potassium hydroxide (KOH) solution and ammonium hydroxide (NH4OH), turn dingy brown with ferrous sulphate and blackish with silver nitrate.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

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

Habitat dan peran ekologis

Cortinarius infractiflavus has a much wider distribution than initially recognized, occurring across Northern Hemisphere boreal and mountainous regions. While first documented in the Greater Yellowstone ecosystem of Wyoming (USA), where it appears to be the common form of the C. infractus complex, molecular studies have confirmed its presence across North America and Eurasia. The species typically grows in coniferous forests dominated by spruce (Picea species) and fir (Abies species). In North America, it has been documented in subalpine forests with Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa) in Wyoming, as well as in British Columbia, Canada. In Europe, the fungus has been found in diverse forest habitats. Collections include specimens from Finland's boreal forests, where it was found in a mixed forest of Scots pine (Pinus sylvestris), Norway spruce (Picea abies), juniper (Juniperus), birch (Betula), poplar (Populus), and alder (Alnus) on dolomite substrate. It has also been documented at elevations of 1600 metres in Bulgaria's Pirin mountains under Norway spruce. This transcontinental distribution pattern, confirmed through DNA sequencing, demonstrates that C. infractiflavus is a widespread species throughout the northern coniferous forest biome rather than a localized variant.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

Habitat atau konteks temuan

hutan

Substrat

Informasi belum tersedia pada sumber rilis ini.

Peran atau konteks

Belum dikategorikan pada rilis ini.

Reproduksi

Microscopically, basidiospores measure 6.7–8.5 × 5.4–6.1 μm (mean 7.6 × 5.4 μm), varying from drop-shaped to nearly spherical or lightly almond-shaped, with a length-to-width ratio of 1.25–1.6 (mean 1.4). The basidia are clavate, four-spored and measure 30–32 × 7.5–8 μm. The gill trama comprises hyphae 5–7 (–8) μm wide—colourless to pale yellowish-grey—with the central layer containing hyphae up to 12 μm wide. The pileipellis is formed by a dense layer of hyphae 5.5–8 μm wide, with pale yellow walls and clamp connections.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

Catatan identitas dan cakupan

• Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
• Original geographic, specimen and life-cycle scope retained; source import awaits individual editorial review.
• 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

Dokumentasi Cortinarius infractiflavus menurut asosiasi foto pada record takson iNaturalist. Kredit: Fotografer tidak dicantumkan. Sumber observasi iNaturalist; pengunggah: Leanne Stacy Reitan. Identitas mengikuti sumber; bukan penentuan spesimen independen.

Jenis

Fotografi

Kredit

Fotografer tidak dicantumkan. Sumber observasi iNaturalist; pengunggah: Leanne Stacy Reitan

Lisensi

CC0 1.0

Sumber media

Buka entri sumber

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

Dokumentasi tambahan

Sumber profil

1. [1] Cortinarius infractiflavus — Wikipedia (en)Bagian sumber: Frozen revision 1355346528
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Cortinarius infractiflavusBagian sumber: ColDP NameUsage.tsv ID YL7J; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Cortinarius infractiflavusBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Media sumber: CC0 1.0 · Fotografer tidak dicantumkan. Sumber observasi iNaturalist; pengunggah: Leanne Stacy Reitan
4. [4] Dokumentasi visual — Cortinarius infractiflavusBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Teks sumber: CC0 1.0 · no rights reserved
5. [5] Dokumentasi visual — Cortinarius infractiflavusBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Teks sumber: CC0 1.0 · no rights reserved