Oregon ash

Leaves

Form

• Pinnately compound
• 5–9 (usually 7) leaflets
• Leaflets with tapered base and broad pointed tip
• Usually densely hairy (tomentose) below

Length

• Leaflets 4–10 cm

Margin

• Usually smooth

Buds

Form

• Terminal bud present, broad, pointed
• 4 pairs of hairy scales
• Leaf scars large, crescent-shaped

Length

• 3–8 mm

Twigs

Form

• Densely hairy in spring
• Stout

Colour

• Becoming reddish-brown to grey

Flowers

Form

• Panicles

Structure

• Dioecious

Floral timing

• With the leaves

Fruits

Form

• Seedcase flattened
• Wings uniformly broad

Structure

• Samara

Bark

Form

• Mature bark deeply fissured with broad, flat ridges

Colour

• Mature bark reddish-brown to grey

Size

Height

• To 21 m

Diameter

• To 1 m

Range

Pacific coast region of North America
Found in southern British Columbia
Natural occurrence in Canada uncertain
May be naturalized