Eucalyptus camaldulensis Dehnh.

Red gum, river redgum

River red gum is native to Australia. Trees brought to California by the lumber trade have become naturalized there, and invasive in some areas.

Plants: Trees are up to 66′ (20 m) in height, rarely to 148′ (45 m). Bark is rough near the base of the tree, and smooth, white or cream-colored higher up. There are irregular shredding patches of white, pink, or brown.

Leaves: Lanceolate and dull green or gray-green. Young leaves are 3–7 ⨉ ½–⅞″ (8–18 ⨉ 1.3–2.5 cm). Older leaves are 1¾–12 ⨉ ¼–1¼″ (5–30 cm ⨉ 7–32 mm). Each leaf’s petiole is ¼–1¼″ (8–33 mm) long.

Flowers: Flower buds, in groups of 7, 9, or 11, extend from a central point. Flowers are white.

Fruits: Woody, hemispherical capsules 1/16–⅛ ⨉ ⅛–⅜″ (2–5 ⨉ 4–10 mm) are pointed, like little tops. They turn from green to red to brown.

Habitats: Most common along watercourses and floodplains.

Online References:

Older scientific or horticultural names

Eucalyptus camaldulensis description by Thomas H. Kent, not updated.

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