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Often called the Chocolate Tube Slime or Tree Hair, Stemonitis axifera is one of the most mesmerizing sights you can find on a rotting log. Though it looks like a cluster of tiny, fuzzy brown lollipops, it isn't actually a mushroom at all—it belongs to a group of organisms called slime molds (Myxomycetes) that possess a strange, "creature-like" ability to move during their early life stages.
🔍 How to Identify
- 🍫 The Fruiting Body: Tall, thin, reddish-brown cylinders (sporangia) that resemble miniature cigars or "chocolate tubes."
- 🧵 The Stalk: Each tube sits on a hair-thin, shiny black stalk that looks almost like a stiff piece of thread or a wire.
- 🏘️ Growth Habit: They almost always appear in dense, upright clusters, creating what looks like a tiny, fuzzy forest growing out of the wood.
🌲 Habitat & Ecology
- 🪵 Substrate: You will almost exclusively find these on damp, decaying logs, stumps, or thick wood mulch, particularly during the humid days of late spring and summer.
- 🏃 The "Crawl": Before they turn into the brown tubes we see, they exist as a white, creamy mass called a plasmodium. This mass can actually "creep" across the wood at a microscopic pace to find the best spot to transform.
⚠️ Safety & Toxicity
- 🚫 Status: NOT EDIBLE. While Stemonitis axifera is not known to be poisonous or "deadly" in the way some true mushrooms are, it has no culinary value and a very unappealing, dry texture.
- 💨 Inhalation: As the tubes age, they turn into a fine powder of spores. It is best not to sniff them closely or disturb them in enclosed spaces, as inhaling large amounts of any spores can irritate the lungs or trigger allergies.
✨ Fun Fact
Slime molds like Stemonitis are biological enigmas. Even though they have no brain or nervous system, they can solve mazes and remember where they have found food by leaving "trails" of slime, leading scientists to study them as a form of "primitive intelligence."
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