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Ceratiomyxa fruticulosa

common coral slime

Ceratiomyxa fruticulosa — 2026-07-25
Scientific identification
Ceratiomyxa fruticulosa (O.F.Müll.) T.Macbr., 1899
Family
Ceratiomyxaceae
Class
Protosteliomycetes
Genus
Ceratiomyxa

Names across languages

  • English: common coral slime
  • German: Geweihförmiger Schleimpilz
  • Finnish: Nukkanen
  • Estonian: Harjas-limasarvik
  • Russian: Цератиомикса кустарничковая

The scientific profile

From the latest record: 2026-07-25.

Plasmodium phase

Watery, translucent to whitish, sometimes faintly yellowish or pinkish

Fruiting bodies

Dense colonies of erect, simple to repeatedly branched, finger- or coral-shaped columns; gelatinous and translucent at first, later white, cream or pale yellow

Peridium

The spores are produced openly on the outer surface rather than enclosed within a sporangium

Attachment

Macroscopic columns sessile on a confluent, mucilaginous hypothallus; each individual spore supported by a delicate microscopic pedicel

Description

Spore mass white to pale yellow

Ecology

On moist, heavily decayed logs, stumps, branches and other plant debris, often appearing in extensive clustered sheets after rain; late spring to autumn

Description

Amoeboflagellate cells → multinucleate plasmodium → coral-like sporophores bearing external stalked spores → spores germinate to release amoeboid or flagellated cells

Edibility

Tiny, gelatinous slime mould with no culinary value

Fruit body

Individual columns approximately 1–10 mm tall and ~0.2–1 mm wide; colonies may spread across many centimetres of decaying wood

Microscopy

Spores smooth, thin-walled, hyaline to very pale yellow, globose, ovoid or ellipsoid, approximately 6–8 × 10–13 µm; borne individually on slender pedicels about 7–20 µm long; true capillitium absent

Overview

Common coral slime forming delicate white, frost-covered miniature antlers or icicles on wet rotten wood

Macbride, T. H. (1899). -. N. Amer. Slime-Moulds, Ed. 1 18.

Field encounters

25/Jul/2026 🎂, 6:02 PM

Toosikannu, Jõeküla, Järva, Eesti

Mixed primeval forest (Spruce, Pine, Alder, Birch), on wet broken hardwood log pulp

58°48'10.4"N 25°03'05.3"E

🌡️ 19°C ☁️ Dark clouds before rain 💨 Wind 200° SSW->NNE, 19 km/h

Original Instagram post

Source hashtags

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