Brooklyn Botanic Garden

Fraxinus americana

Fraxinus

by Science Staff
Not peer reviewed
Last modified: 02/06/2013

Nomenclature

Fraxinus L., Sp. Pl. 1057. 1753. Gen Pl., ed. 5, 477. 1754. LECTOTYPE: Fraxinus excelsior L. designated by Britton & Brown (1913)

Calycomelia Kostel., Allg. Med.-Pharm. Fl. 3: 1003. 1834. TYPE: Not designated.

Leptalix Raf., New Fl. 3: 93. 1838 (“1836”). TYPE: Not designated.

Aplilia Raf., New Fl. 3: 93. 1838 (“1836”). TYPE: Not designated.

Key to the species of Fraxinus

1. Leaflets sessile...2
1. Leaflets with a petiole...3

2. Rachis at base of leaflets with thick reddish tomentum; flowers dioecious...Fraxinus nigra
2. Rachis without conspicuous tomentum; flower polygamous...Fraxinus excelsior

3. Leaf scar upper margin sunken with bud down into scar...Fraxinus americana
3. Leaf scar upper margin straight, with bud above scar...4

4. Current year’s twigs glabrous or with white or gray tomentum...Fraxinus pennsylvanica
4. Current year’s twigs with brownish-yellow tomentum...Fraxinus profunda

List of Fraxinus Species

References

References to Fraxinus

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