Abstract
The name Alnus viridis (Chaix) DC., based on Betula viridis Chaix (1785), has traditionally been attributed to green alders although it is based on a later basionym. Alnus alnobetula (Ehrh.) K. Koch based on Betula alnobetula Ehrh. (1783) is the correct name for green alders. In light of the increasing use and recognition of the name Alnus alnobetula (Ehrh.) K. Koch in the literature. I herein propose new nomenclatural combinations to account for the Japanese and Chinese subspecies respectively: Alnus alnobetula subsp. maximowiczii (Callier ex C.K. Schneid.) J. Chery and Alnus alnobetula subsp. mandschurica (Callier ex C.K. Schneid.) J. Chery. Recent phylogenetic analyses place these two taxa in the green alder species complex, suggesting that they should be treated as infraspecific taxa under the polymorphic Alnus alnobetula.
Highlights
Characteristic to the genus, Alnus alnobetula (Ehrh.) K
The close relatedness of the green alder species complex members is supported by recent phylogenetic anaylses
The use of a single nrDNA marker, ITS, generated a weakly supported clade of A. mandshurica, A. firma, A. pendula and A. sieboldiana embedded within a greater polytomy that includes all other green alders
Summary
Characteristic to the genus, Alnus alnobetula (Ehrh.) K. Has long been attributed to green alders; a closer look at the literature reveals the name Alnus alnobetula (Ehrh.) K. Appropriate nomenclatural combinations have recently been published for A. alnobetula subsp. In Ehrhart (1788), he republished his work where the name Betula alnobetula Ehrh. As Betula species were transferred to Alnus, authors were unaware of the original 1783 publication of the name B. alnobetula Ehrh., so B. viridis Chaix was thought to be the older name and was taken to be the basionym for green alders.
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