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The mature mushroom cap has a diameter of +/- 30cm - huge!
These mushrooms sprung up in a carpark which was strewn with macadamia nut shells in December 2019. The carpark is at our local tennis club in a small coastal village of Southbroom, on the south-east coast of Kwazulu-Natal, South Africa. We have a sub-tropical climate. There is a park and conservation area adjoining the carpark' but we have never seen this mushroom here before. A theory was that spores might have been transported in the nutshells and with Lockdown and nobody permitted out, and therefore no driving in the car park, the mushrooms have sprung forth!
This is the closest we've got to an identification, but would like to know where they originate from. I believe they're highly toxic and can lead to nasty gastrointestinal illness and can be easily confused with other Chlorophyllum which are edible.
Spotted on Apr 15, 2020
Submitted on May 20, 2020