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× Hesperotropsis , a new nothogenus for intergeneric crosses between Hesperocyparis and Callitropsis ( Cupressaceae ), and a review of the complicated nomenclatural history of the Leyland cypress
Author(s) -
Garland Mark A.,
Moore Gerry
Publication year - 2012
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.1002/tax.613015
Subject(s) - cypress , cupressaceae , taxodium , biology , botany , cupressus , nomenclature , taxonomy (biology) , pollen
The widely cultivated Leyland cypress, a hybrid between Nootka cypress and Monterey cypress that was originally named Cupressus xleylandii , exemplifies the instability of names of nothogenera when there are changes in generic placement of the parental taxa. Because of recent phylogenetic research, the parent species of Leyland cypress have each been put in four different genera, leading to 13 possible nothospecific names for this hybrid. Here we present the correct nomenclature for the Leyland cypress under these different taxonomic concepts. We also propose a new nothogenus, ×Resperotropsis, for crosses between Hesperocyparis and Callitropsis , and publish three new combinations in xHesperotropsis , including xHesperotropsis leylandii for the Leyland cypress.