Alnus Mill.
(alders)

Subtaxon	Rank	No of images	No of ID refs
Alnus cordata Italian Alder	Species	32 images
Alnus glutinosa Alder	Species	40 images	1 ident. refs
Alnus incana Grey Alder	Species	9 images

Taxonomic hierarchy:

Genus	Alnus (alders)
Family	BETULACEAE (birches, hazels, hornbeams and alders)
Order	FAGALES (forest trees)
Subclass	EU-DICOTS (dicotyledonous flowering plants)
Class	MAGNOLIOPSIDA (flowering plants)
Phylum	TRACHEOPHYTA (vascular plants)
Kingdom	PLANTAE (plants)
Domain	Eukaryota (eukaryotes)
Life	BIOTA (living things)

Alnus is also a member of:
Ectomycorrhizal broadleaved trees and shrubs - ectomycorrhizal or ectotrophic mycorrhizal broadleaved trees and shrubs (via Betulaceae)
Ectomycorrhizal trees and shrubs - ectomycorrhizal or ectotrophic mycorrhizal trees and shrubs (via Ectomycorrhizal broadleaved trees and shrubs)
Broadleaved trees and shrubs - broadleaved trees and shrubs (via Ectomycorrhizal broadleaved trees and shrubs)
Xylophytes - broadleaved trees, shrubs and woody climbers (via Broadleaved trees and shrubs)
Trees and shrubs - trees and shrubs, including conifers (via Ectomycorrhizal trees and shrubs)
Broadleaved trees - broadleaved, frondose or deciduous trees (via Fagales)
Trees - broadleaved and coniferous trees (via Broadleaved trees)
Trees, shrubs, woody and climbing plants - trees, shrubs, subshrubs and climbers, including conifers (via Broadleaved trees)

Identification Works

	Author	Year	Title	Source
	Parnell, J.		Alnus	Yeo, P.F. Acaena, taxa with spherical heads, Plant Crib 2012

Alnus (alders) may also be included in identification literature listed under the following higher taxa:

FAGALES
(forest trees)

MAGNOLIOPSIDA
(flowering plants)

TRACHEOPHYTA
(vascular plants)

PLANTAE
(plants)

Eukaryota
(eukaryotes)

BIOTA
(living things)

Xylophytes
(broadleaved trees, shrubs and woody climbers)

Trees and shrubs
(trees and shrubs, including conifers)

Broadleaved trees
(broadleaved, frondose or deciduous trees)

Trees
(broadleaved and coniferous trees)

Trees, shrubs, woody and climbing plants
(trees, shrubs, subshrubs and climbers, including conifers)

NBN (data.nbn.org.uk) has a distribution map for Alnus (alders)

BioInfo (www.bioinfo.org.uk) has 534 host/parasite/foodplant and/or other relationships for Alnus (alders)

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Photographs from other photographers are used with permission but not included under the above CC licence.

Taxonomic hierarchy:

Alnus is also a member of:

Identification Works

BioImages - Virtual Field-Guide (UK)