Details for: Alnus incana var. occidentalis
2 different source(s) use this name:

- Govaerts, R. & Frodin, D. G. 1998: World Checklist and Bibliography of Fagales. RBG Kew.
- USDA Plants Database, generated January 15, 1997

Source: Govaerts, R. & Frodin, D. G. 1998: World Checklist and Bibliography of Fagales. RBG Kew. [IOPI preferred view]
Name: Alnus incana var. occidentalis (Dippel) Hitche
Nomencl. ref. Vasc. Pl. Pacif. N.W. 2: 73 (1964)
Rank: Varietas
Status: SYNONYM
Synonym of: Alnus incana subsp. tenuifolia (Nutt.) Breitung
Taxon Notes:
 
SourceStatusDesignation: S

Source: USDA Plants Database, generated January 15, 1997
Name: Alnus incana var. occidentalis (Dippel) C.L. Hitchc.
Rank: Varietas
Status: SYNONYM
Synonym of: Alnus incana subsp. tenuifolia (Nutt.) Breitung
 
Geography: US(AK, AZ, CA, CO, ID, MT, NV, NM, OR, UT, WA, WY)
Reference in Source: For reference information check with USDA NRCS Plants Database at http://plants.usda.gov/
SourceStatusDesignation: S