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
diploidchromosome 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.[2]
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.[2]
Bateman, Richard M. & Hollingsworth, Peter M. (2004): Morphological and molecular investigation of the parentage and maternity of A. × albuferensis (A. robusta × A. fragrans), a new hybrid from Mallorca, Spain. Taxon53(1): 43–54.
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Bateman, Richard M.; Hollingsworth, Peter M.; Preston, Jillian; Yi-bo, Luo; Prodgeon, Alec M. & Chase, Mark W. (2003): Molecular phylogenetics and evolution of Orchidinae and selected Habenariinae (Orchidaceae). Bot. J. Linn. Soc.142(1): 1–40.
doi:
10.1046/j.1095-8339.2003.00157.xPDF fulltext