Yellow Umbo Isolated Spore Syringe – 10cc | Spore Genetics

The first documented Psilocybe cubensis × Psilocybe natalensis hybrid

The Yellow Umbo Isolated Spore Syringe represents a true milestone in psychedelic mycology. Created by renowned mycologist Yoshi Amano, this magic mushroom strain is the first documented hybrid between Psilocybe cubensis and Psilocybe natalensis mushrooms. Achieved through advanced techniques such as serial streaking, monokaryon pairing, and interspecific verification testing (with contributions from Kilor Diamond and Imperial Labs), Yellow Umbo Spores set a new benchmark in fungal genetics.

The result is a genetically stable hybrid that expresses the best traits of its parent species:

· From Psilocybe natalensis (South Africa): resilience, unique morphology, and a powerful profile

· From Psilocybe cubensis ‘Jack Frost’: frost-tinged mycelium and robust fruiting characteristics

Visually, Yellow Umbo stands out with its small, pointed golden-yellow caps and wavy, playful stems — a morphology rarely seen in cubensis alone. This strain also forms unique coral like blobs that bruise a deep blue. Its novelty, paired with its reported high-potency profile, makes it one of the most sought-after research specimens on the shroom market!

Yellow Umbo Isolate Product Features

✔ Hybrid: Psilocybe natalensis × Psilocybe cubensis (Jack Frost)
✔ Created by mycologist Yoshi Amano, verified with Imperial Labs
✔ Achieved through serial streaking, monokaryon pairing, and interspecific testing
✔ Unique morphology: pointed yellow caps, wavy stems, frost-like mycelium
✔ Exclusive genetics available through limited vendors
✔ Also known as Yumbo, Umbo, Yubo

What’s Included in your Yumbo Spore Isolate Kit

One (1) 10cc Yellow Umbo Isolated Spore Syringe

One (1) 16-gauge sterile needle

One (1) Alcohol prep pad

Includes our “How to Use a Mushroom Spore Syringe” guide 

Looking for another high-profile cubensis hybrid? Check out our Albino Chodewave Isolated Spore Syringe or the Enigma Isolated Spore Syringe

Important: Intended for microscopy and taxonomy purposes only — not for cultivation.