MushieOyster mushroom vs Jack-o'-lantern: how to tell them apart
Both grow in overlapping clusters on hardwood trees and stumps, and both have gills running down the stem. Oyster mushrooms are grey, tan or pale brown with white gills and white flesh. Jack-o'-lanterns are bright pumpkin-orange inside and out and cause severe stomach illness.
Side-by-side comparison
 Pleurotus ostreatus |  Omphalotus olearius | |
|---|---|---|
| Safety status | Edible (expert ID) | Poisonous |
| Cap | Grey-brown to blue-grey, 5–20 cm, shell-shaped and smooth | Bright orange, 5–12 cm, convex to funnel-shaped |
| Underside | White to cream gills running down the stem | True, thin, sharp-edged gills that run down the stem |
| Stem | Short, off-centre or absent | Orange, tapering to a base that joins others in a tight cluster; no ring |
| Smell | Mild, faintly of anise | Mild, slightly sweetish |
| Spore print | White to lilac-grey | White to pale cream |
| Habitat | Clusters on dead and dying broadleaf trees, especially beech | In dense clusters on stumps and buried roots of broadleaf trees, olive and oak |
| Season | Sep – Mar | Aug – Nov |
Photos: voir ci-dessous / see below, CC BY 3.0 · Antonio Abbatiello, Public domain
Quick tests that separate them
- Colour: grey-brown or oyster-white cap with white gills (oyster) vs bright orange cap, gills and stem (jack-o'-lantern).
- Flesh when torn: white (oyster) vs pale orange (jack-o'-lantern).
- Growth form: fan-shaped shelves on trunks (oyster) vs vase-like clusters at stump bases and buried roots (jack-o'-lantern).
Key clues for each
Oyster mushroom: Shell-shaped caps in shelves on wood, decurrent white gills, white to lilac-grey spore print and a mild smell.
Jack-o'-lantern: True, knife-edged gills (not blunt ridges), growing in tight bunches on wood. The gills can glow faintly in the dark.
Frequently asked questions
How can I tell oyster mushroom from jack-o'-lantern?
Both grow in overlapping clusters on hardwood trees and stumps, and both have gills running down the stem. Oyster mushrooms are grey, tan or pale brown with white gills and white flesh. Jack-o'-lanterns are bright pumpkin-orange inside and out and cause severe stomach illness.
Which is more dangerous, oyster mushroom or jack-o'-lantern?
Jack-o'-lantern (Omphalotus olearius) is the dangerous one. Causes violent vomiting, cramps and diarrhoea, usually for several hours to days. Not normally fatal but a medical emergency for some people.
Is it safe to identify mushrooms from photos or a website?
Never eat a wild mushroom based on an app or a website. Confirm identification and edibility in person with a qualified local expert.
Compare in the field
Photograph your find with Mushie to see possible matches and the look-alikes to rule out. Results are suggestions, never a safe-to-eat verdict.