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How Arum Flowers Generate Heat
Reported measurement: Cooke recounts Hubert placing a thermometer among five Arum cordifolium spadices: it read 131°F, while the surrounding air was 74–75°F, a difference of about 56°F[1].
Cooke’s explanation: A spadix is the flower-bearing structure; in arums, many small flowers cluster at its base, while the enclosing spathe slows the escape of heat[2]. He attributed the warmth to chemical change and oxidation during flowering. That is Cooke’s period botanical account, distinct from the thermometer reading, not a newly verified explanation offered here[3].
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