Systematics
Except the Pyramidal Orchid (A. pyramidalis), all species of Anacamptis seem to form a clade around the Green-veined Orchid (A. morio). They have a diploid chromosome number of 32 or 36. A useful character for distinguishing Anacamptis from Orchis – where the Green-veined Orchid clade was formerly included – is the basal fusion of the three sepals in Anacamptis.
The few bigeneric hybrids are typically between closely related genera, in particular Serapias. Hybrids between the Pyramidal Orchid and the Early Purple Orchid (Orchis mascula), found in Cumbria (UK) in 1997, proved short-lived because of the highly divergent genomic lineages of the parents.
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