Sweet Knot Mushroom (Globifomes Graveolens)



Your order today will contain:

(1) Sterile 12 ml syringe with locking cap, filled with fresh   Gourmet Mushroom  mycelium. 

(1) Mylar syringe sleeve for long-term storage.

(2) Alcohol pads.

(1) 16-gauge needle.

(1) Cold / Warm Weather insert (depending on shipping location and time of year)

(1) Free 20-gram sample pack of my mushroom nutrient broth premix.

A $15 value, make 1 liter of your own lab-quality mushroom liquid culture.


Sweet Knot Mushroom (Globifomes Graveolens)
Sweet Knot Mushroom (Globifomes Graveolens)

Sweet Knot Mushroom (Globifomes Graveolens)

The Sweet Knot Mushroom (Globiformes graveolens) is a rare, inedible polypore fungus that is found in North America. It is characterized by its globular or spherical fruiting bodies, which can grow up to 20 cm in diameter. The Sweet Knot Mushroom is typically found on the trunks or logs of deciduous trees, especially oaks.

The Sweet Knot Mushroom is not edible, but it has a sweet, fragrant odor that is often compared to vanilla or anise. This fragrance has led to the Sweet Knot Mushroom being used as a natural air freshener and potpourri ingredient.

The Sweet Knot Mushroom is also of interest to mycologists, who are studying its potential medicinal properties. Some studies have shown that the Sweet Knot Mushroom contains compounds that have anti-inflammatory and antioxidant properties. However, more research is needed to confirm these potential benefits.

Overall, the Sweet Knot Mushroom is a fascinating and unique fungus. While it is not edible, it has a sweet fragrance and potential medicinal properties.

Globifomes graveolens

Polypores are not often easily recognized (by me, anyway), but Globifomes graveolens is an exception. Found in North America east of the Rocky Mountains on the wood of oaks and other hardwoods, this funky mushroom develops a series of cascading, overlapping caps from a hidden central core of flesh.

The odor of Globifomes graveolens is often reported as potentially strong and sweet—by authors who say that, in their own experience, there is no such odor. Overholts (1953) may have started this tradition; he reports no odor from any of the numerous collections he has studied, but says that “many years ago when a fresh collection was shown to my father he at once recognized it as ‘sweet knot’ and described how on occasions he had seen the fungus placed in living rooms, where it soon scented the whole house.” You are welcome to do with that what you will. The specimens I have studied had no distinctive odor.

Thanks to Brian Stanley for documenting, collecting, and preserving Globifomes graveolens for study; his collection is deposited in The Herbarium of Michael Kuo.


Ecology: Saprobic and possibly parasitic; appearing on deadwood and from the wounds of living hardwoods (primarily oaks); causing a white rot; annual, or perennial for a few years; summer and fall—or year-round in warmer climates; originally described from Georgia; widely distributed in North America east of the Rocky Mountains. The illustrated and described collection is from Ohio.

Fruiting Body: 10–23 cm high; 8–16 cm across; 6–10 cm deep; a mass of tightly packed, overlapping individual caps arising from a central core.

Individual caps: 1–5 cm across; semicircular to fan-shaped; planoconvex to flat; often drooping; bald or finely fuzzy; dry; with vague concentric zones of color; reddish brown to brown, becoming dull brownish gray with age.

Pore Surface: Grayish, becoming brownish to brown; not bruising; pores round and small (2–4 per mm), with thick dissepiments; tubes 2–4 mm deep.

Flesh: Granular in the central core; tough and fibrous in the caps; pale to dark brown; unchanging when sliced.

Odor: Not distinctive.

Chemical Reactions: KOH slowly black on flesh of dried specimens.

Microscopic Features: Spores not found; reported (Gilbertson & Ryvarden 1987) as 10–14 x 3–4 µm; cylindric; smooth; hyaline in KOH; inamyloid. Basidia 4-sterigmate. Hymenial cystidia not found. Setae not found. Hyphal system trimitic: generative hyphae 3–5 µm wide, smooth, thin-walled, hyaline in KOH, with clamp connections; skeletal hyphae 4–6.5 µm wide, smooth, thick-walled, brown in KOH; binding hyphae 5–10 wide, very thick-walled, aseptate. Sclerids abundant in granular core context; thick-walled; reddish brown in KOH.



Additional information

Weight 1 oz
Dimensions 9 × 6 × 1 in

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