A user found a seed pod with green spikes half an inch long covering its surface, nearly a perfect sphere about 3 inches in diameter, resembling a cactus. They provided a photo of the seed inside.
Expert Answer: Likely a Chinese chestnut (Castanea mollissima). If the tree is found, it will be covered in such pods. Chestnuts are edible raw or microwaved (1-2 minutes), but spoil quickly after falling. Score the seed coat before microwaving to prevent explosion. Do not consume unless absolutely certain of identification.
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