Heterobasidion occidentale

Ciri dan struktur

The cap is usually wider (and commonly taller) than its depth from the wood. It is 2-15 cm wide, sometimes fuzzy when young and knobby when old. The upper surface of the small shelf or "conk" is dark brown to black, and the margin has an irregular edge. The larger base is covered with white spore tubes. The flesh is whitish and displays annual tube layers. Identification in affected wood, known as white pocket rot, includes symptoms in the form of dark discolouration around the heartwood near the base. Heavily diseased wood will be soft, stringy, and fibrous that may contain black specks parallel to the grain. Quick identification of affected wood can be done by wrapping suspect wood in damp paper towels and left for 5–6 days for the tell-tale formation of the conidial anamorph, Spiniger meineckellus. The basidiospores are spherical to ellipsoid, distinctive of the family Bondarzewiaceae.

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Rujukan: [1]

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Habitat dan peran ekologis

H. occidentale is found in Western North America from Alaska to Southern Mexico. It is found as far inland as Colorado and Montana, but has not been observed east of the Rocky Mountains. The incidence is of highest importance in stands of intensive silviculture, such as Christmas tree plantations. It is also of high importance to the Abies religiosa forests in Central Mexico that are the winter home for the monarch butterfly (Danaus plexipus). The perennial basidiocarps tend to form near the forest floor of affected trees, either on the base or roots of living or dead specimens, and thus may be hidden in the forest duff. H. occidentale affects several species of trees including major hosts including Douglas-fir (Pseudotsuga menziesii), western hemlock (Tsuga heterophylla), and various fir (Abies) species. Other notable hosts include sitka spruce (Picea sitchensis) as well as numerous deciduous trees such as red alder (Alnus rubra), bigleaf maple (Acer macrophyllum) and pacific madrone (Arbutus menziesii). Ornamental and landscape trees are seldom affected. This contrasts the Eurasian S-type species, H. parviporum, which has a fairly strict host range of spruce, fir, and larch. Heterobasidion can be spread through conidia, basidiospores, and mycelia.

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Rujukan: [1]

Habitat atau konteks temuan

hutan

Substrat

Informasi belum tersedia pada sumber rilis ini.

Peran atau konteks

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Reproduksi

The cap is usually wider (and commonly taller) than its depth from the wood. It is 2-15 cm wide, sometimes fuzzy when young and knobby when old. The upper surface of the small shelf or "conk" is dark brown to black, and the margin has an irregular edge. The larger base is covered with white spore tubes. The flesh is whitish and displays annual tube layers. Identification in affected wood, known as white pocket rot, includes symptoms in the form of dark discolouration around the heartwood near the base. Heavily diseased wood will be soft, stringy, and fibrous that may contain black specks parallel to the grain. Quick identification of affected wood can be done by wrapping suspect wood in damp paper towels and left for 5–6 days for the tell-tale formation of the conidial anamorph, Spiniger meineckellus.

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 Heterobasidion occidentale dari Wikimedia Commons. Picture of Heterobasidion occidentale fruiting body Identifikasi mengikuti record berkas sumber.

Jenis

Fotografi

Kredit

Melbourne132

Lisensi

CC BY-SA 3.0

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] Heterobasidion occidentale — Wikipedia (en)Bagian sumber: Frozen revision 1278872612
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Heterobasidion occidentaleBagian sumber: ColDP NameUsage.tsv ID 6M39H; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Heterobasidion occidentaleBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY-SA 3.0 · Melbourne132