Single-leaf Ash
Lowell Ash

Fraxinus anomola

Single-leaf Ash, Fraxinus anomola, photo © by Michael Plagens

On a steep hillside well above wooded riparian habitat, Round Tree Canyon, s.e. Yavapai Co., Arizona. 9 May 2016.

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TREE: A small tree sometimes forming a copse of several small trees yielding another common name, Dwarf Ash. The young twigs are usually noticeably angled in cross-section.

RANGE: This tree tends to occur upslope from wooded riparian zones - on the steep canyon sides where a fissure or ravine brings sufficient moisture.

FLOWERS: Dioeceous: male and female flowers appear on separate trees. No petals.

FRUIT: Winged ash seeds have a much wider wing than those of velvet ash.

LEAVES: Populations vary considerably. Some have leaves with only one leaflet - per the common name - but others have five. The upper surfaces are shiny, dark green.

UNARMED: no thorns

Single-leaf Ash, Fraxinus anomola, photo © by Michael Plagens

Oleaceae -- Olive Family

More Information:

Arizona Naturalist
Sycamore Canyons
The Flora of Arizona's Sycamore Canyons


Copyright Michael J. Plagens, page created 13 June 2016.