IBEROATLANTICA

Overview

The study area (except the Basque Country and a few other watersheds) is mostly occupied by "Alnus lusitanica", a tetraploid species that differs from "Alnus glutinosa" in that it generally shows a straight leaf apex (rather than emarginate), a longer peduncle of the female catkin, and broader, shorter leaves (Cuerdo et al. 2025. https://doi.org/10.1016/j.flora.2025.152723).

Status

Native

Nomenclature

Alnus glutinosa aggr.

Species data in Europe

Alnus lusitanica
Alnus glutinosa

Habitats

This species has been recorded in the following habitats (only habitats with species frequency > 5% are shown).:

Alnus swamp forests not on acid peat 100%, Riverine Fraxinus-Alnus forest, wet at high but not at low water 100%, Temperate and boreal riverine Salix forest 39%, Lowland and collinar riverine Salix scrub 27%, Iberian acidophilous birch forests 15%, Atlantic poor soil thickets 15%, Quercus-Fraxinus-Carpinus betulus forest on eutrophic and mesotrophic soils 12%, Beds of large Carex species 9%, Iberoatlantic lauroid forests in humid ravines with Prunus lusitanica 7%, Fringes of nutrient-rich ditches and riverbanks, with tall-herb perennial vegetation 6%

Regional distribution

Localities (10 x 10 km) where the species has been recorded in the context of the study area. The complete distribution of the species in the Iberian Peninsula can be found in AFLIBER.