High Quality Content by WIKIPEDIA articles! Angraecum sesquipedale is an epiphytic orchid in the genus Angraecum that is endemic to Madagascar. The orchid was first discovered by the French botanist Louis-Marie Aubert du Petit-Thouars in 1798, but was not described until 1822. It is noteworthy for its long spur and its association with the naturalist Charles Darwin who surmised that the flower was pollinated by a then undiscovered moth with a proboscis whose length was then unprecedented. His prediction had gone unverified until 21 years after his death when the moth was discovered and his conjecture vindicated. The story of its postulated pollinator has come to be seen as one of the celebrated predictions of the theory of evolution.

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