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Fraxinus papillosa

Fraxinus papillosa Lingelsh.

Chihuahuan Ash, Chihuahua Ash

Oleaceae (Olive Family)


USDA Symbol: FRPA4

USDA Native Status: L48 (N)

Small tree with leaflets whitish beneath.

Chihuahua Ash extends northward across the Mexican border into several mountainous areas and may be seen in Coronado National Forest in southeastern Arizona. It is easily recognized by the whitish lower surfaces of the leaflets. Under a microscope, the lower surfaces of the leaves appear as a solid mass of whitish beads, which are the minute projections or papillae of each epidermal cell. The Latin species name refers to this characteristic, present also in Texas Ash (Fraxinus albicans) and White Ash (Fraxinus americana), two related eastern trees. Apparently no botanical description of the flowers of this local species has been published.


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Plant Characteristics

Duration: Perennial
Habit: Tree

Bloom Information

Bloom Color: Green
Bloom Time: Apr


Native Distribution: SW. New Mexico, SE. Arizona, and N. Mexico; at 5000-7000 (1524-2134 m).
Native Habitat: Moist soils of canyons in mountains; in oak woodland.


Bibref 298 - Field Guide to Texas Trees (1999) Simpson, B.J.

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Additional resources

USDA: Find Fraxinus papillosa in USDA Plants
FNA: Find Fraxinus papillosa in the Flora of North America (if available)
Google: Search Google for Fraxinus papillosa


Record Modified: 2015-11-12
Research By: TWC Staff

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