The mature fungus reeks of carrion to attract flies. The unopened 'egg' stage is technically edible — most people decline.
Side by side
Clathrus archeri
Phallus impudicus
In this game
Inedible / unclear
Inedible / unclear
Habitat
Leaf litter, wood chip and garden mulch; introduced far beyond its native range.
Rich woodland soil, gardens and buried wood — usually smelled before it is seen.
Season
Summer to autumn.
Summer to autumn.
Spore print
No print — the spores leave in the olive slime, on the feet of flies.
No print — the spores leave in the olive slime, on the feet of flies.
This comparison cannot make a mushroom safe to eat. It sets out the few characteristics this game records, in general terms, for two species that vary by region, age and growing conditions. Real specimens overlap in ways no table and no photograph can separate, and the deadly one here is deadly in a single meal. Ask a qualified local expert, every time.