Oleaceae

Blue ash

Fraxinus quadrangulata Michx.

Family: Oleaceae
Genus: Fraxinus

Pet and kid safety: not checked yet. Check pet-safe plants

Blue ash (Fraxinus quadrangulata) — FlowerPhoto: Quinten Wiegersma, CC BY 4.0, from iNaturalist

Is yours looking unwell? Scan your plant — free

Common names

By language (8)

Arabic: مران رباعي الأضلاع
arz: مران رباعى الاضلاع
Chinese: 四棱梣
English: Blue ash
German: Blau-Esche
Icelandic: Bláaskur
Japanese: ブルー・アッシュ
Spanish: Fresno azul

Synonyms

Calycomelia quadrangulata (Michx.) Kostel.
Fraxinus americana var. quadrangulata (Michx.) D.J.Browne
Fraxinus quadrangularis Lodd.
Fraxinus quadrangulata var. subpubescens Wesm.
Fraxinus tetragona Cels ex Dum.Cours.
Leptalix quadrangulata (Michx.) Raf.

Characteristics

Growth habit: Tree
Lifespan: Perennial
In the US and Canada: Canada: native, Lower 48 states: native

Photos

FlowerPhoto: Quinten Wiegersma, CC BY 4.0, from iNaturalist
FruitPhoto: Alexandria Szakacs, CC BY 4.0, from iNaturalist
LeavesPhoto: kent ozment, CC0, from iNaturalist
LeavesPhoto: Jo Roberts, CC BY 4.0, from iNaturalist
Photo: Reuven Martin, CC0, from iNaturalist
Photo: Richard Webb, Bugwood.org, USA, CC BY 3.0, from Wikimedia Commons
Photo: Nathan Aaron, CC BY 4.0, from iNaturalist
Photo: Calvinnathanhobbes, CC BY-SA 4.0, from Wikimedia Commons
Photo: James St. John, CC BY 2.0, from Wikimedia Commons
Photo: James St. John, CC BY 2.0, from Wikimedia Commons
Photo: Daniel J. Layton, CC BY 4.0, from iNaturalist
Photo: James St. John, CC BY 2.0, from Wikimedia Commons

More in Fraxinus

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.