Fraxinus L.

Type species: Fraxinus excelsior L.

Synonyms: Apilia (F. anomala), Aplilia, Calycomelia, Fraxinoides, Leptalix, Mannaphorus, Meliopsis, Ornanthes, Ornus, Petlomelia, Samarpsea

Distribution: In temperate and subtropical regions of the Northern Hemisphere

Number of species: 48

Description (from Flora of China): Trees or rarely shrubs, deciduous or rarely evergreen. Leaves odd-pinnate, opposite or rarely whorled at branch apices; petiole and petiolule often basally thickened. Inflorescences terminal or axillary toward end of branches, or lateral on branches of previous year, paniculate; bracts linear to lanceolate, caducous or absent. Flowers small, unisexual, bisexual, or polygamous. Calyx 4-toothed or irregularly lobed, sometimes absent. Corolla white to yellowish, 4-lobed, divided to base or absent. Stamens 2, inserted at base of corolla lobes; filaments short, exserted at anthesis. Ovules 2 in each locule, pendulous. Style short; stigma ± 2-cleft. Fruit a samara with apically elongated wing. Seeds usually 1, ovate-oblong; endosperm fleshy; radicle erect.

Links to species lists and keys

• New classification of Fraxinus and list of 48 accepted species (Wallander 2008, updated 2013)
• Key to the sections of Fraxinus (Wallander 2008, updated 2013)
• Key to Fraxinus species in Mesoamericana (Wallander unpublished)
• Vegetative key to species of Fraxinus cultivated in western Europe, by Jan De Langhe 2012
• Description of Fraxinus and a key to the species treated in Flora Mesoamericana
• Fraxinus list of names from TROPICOS
• List of US species of Fraxinus with synonyms from USDA Plants Database
• Fraxinus extracted from the GRIN database
• Fraxinus extracted from the BONAP (Biota of North America Program)
• Listing of Fraxinus species and species descriptions in Flora of Japan
• Description of Fraxinus with a key to the species treated in Flora of China
• Description of Fraxinus and a key to the genera treated in Flora of Pakistan
• Fraxinus in Flora Europaea
• Fraxinus in IPNI
• Fraxinus in The Plant List

Images

• My images of some Fraxinus species with links to other image sources.
• Fraxinus images from CalPhotos

Links to information about some species of Fraxinus

• FRAXIGEN reserach project 2002-2005
• Flowering biology of Fraxinus excelsior, F. ornus and F. angustifolia
• Gender variation in Fraxinus excelsior (by Pierre Binggeli and James Power)

Links to other information about Fraxinus

• Information about the threat from the Emerald ash borer (EAB) to Fraxinus in North America

References

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