Narrative

Birch Family (Betulaceae) contains about 100 different species usually organized into six different genera. Five of the birch genera are found in the United States. Because of the great interest in this family, included here is a list of the various trees in the Birch family now found the United States and Canada:

*Alnus glutinosa - European Alder - Introduced USA
Alnus incana (=tenuifolia) -Thinleaf Alder- NW USA
Alnus incana (ssp rugosa)- Speckled Alder - East N. America
Alnus maritima - Seaside Alder - Local in USA
Alnus nepalensis - - - - -
Alnus oblongifolia - Arizona Alder - Mexico to Ariz.
Alnus rhombifolia - White Alder - Pacific NW
*Alnus rubra - Red Alder - Cal Coast to Alaska
Alnus serrulata - Tag Alder - SE USA
Alnus viridis (=sinuata) - Sitka Alder- Pac. NW to Alaska
Alnus viridis ssp crispa - Green Alder - SE USA

Betula alba - European Birch - Eur. & Int. USA
*Betula alleghaniensis(lutea) - Yellow Birch - E. N. America
Betula borealis - Northern Birch - NE N. America
Betula caerulea-grandis - Blue Leaf - E. Canada
Betula eastwoodiae - Yukon Birch - W. Canada
* Betula lenta - Sweet, Cherry B
Betula minor - Minor Birch - Arctic
Betula murrayana---
*Betula nana(=michauxii, glandulosa)- Dwarf - Northern N. Amer.
Betula neoalaskana - - -
*Betula nigra - River Birch - E. USA
*Betula occidentalis - Water Birch - West Mountains
*Betula papyrifera - Paper Birch - North N. America
*Betula pendula - Weeping Birch - Eur. & Int. USA
*Betula platyphylla - - - -
*Betula populifolia - Gray Birch - E.Canada N.Eng.
*Betula pubescens - Silver Birch - Eurasia(?)
*Betula pumila - Swamp Birch - Bogs, widespread
Betula rotundifolia - Ground Birch - Alaska
Betula uber - Virginia Birch - Local

Carpinus betulus - European Hornbeam - Eur. & Int. USA
Caprinus caroliniana - American Hornbeam - East USA
Corylus americana - American Hazel - E. N. America
Corylus avellana - Corkscrew Hazel - Eur. & Int. USA
Corylus cornuta(=rostrata)- Beaked Hazel - E. N. America
Corylus cornuta ssp calif - California Hazel - West Coast
Corylus heterophylla - - - -
Corylus maxima - Giant Filbert - Eur. & Int. USA
Ostrya knowlontonii - Knowlton Hophornbeam - Local West USA
Ostrya virginiana - E. Hophornbeam - E. USA

Taxonomy

References