Angraecum longicalcar, also known as the long spurred Angraecum, is a large critically endangered orchid endemic to the Central Highlands of Madagascar. This lithophytic species is noteworthy for its exceptionally long 40 cm nectar spur, rivalling that of the famous Darwins' orchid (A. sesquipedale), and as such may have the longest spur of any orchid species.

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