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Eucalyptus camaldulensis

Dehnh. (1832)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Myrtales Family: Myrtaceae Genus: Eucalyptus

Murray red gum, palepiwa (Ni‘ihau via St. John), river gum, river red gum

Description

Key Characters:

Growth Form: Trees 20–45 m tall.

Stems: Bark white, gray, brown, or red in patches, smooth throughout.

Roots:

Leaves: Leaves simple. Adult Alternate. Blades lanceolate to narrowly lanceolate, 8–30 cm long, 0.7–2 cm wide. Apex acuminate. Blades concolorous. Margins entire. Petioles 12–15 mm long. Stipules vestigial or absent.

Flowers: Flowers 7–11 in axillary, simple umbels, peduncles 6–15 mm long, pedicels 5–12 mm long. buds globose–rostrate or ovoid-conical, 6–9 mm long, 3–6 mm wide. Flowers bisexual (perfect), actinomorphic. Calyx modified into an operculum; operculum hemispherical, rostrate, or conical, apex obtuse. Stamens numerous, in several whorls; anthers dithecal. Ovary inferior; ovule placentation axile.

Fruit: Fruit hemispherical or ovoid; 5–8 mm long and wide; valves 3–5; exserted. Seeds numerous.

Ploidy: 2n = 22; 28

Habitat: Extensively planted on Kaua'i; O'ahu; Molokai; Maui; and Hawai'i; and regenerating from seed at least within or near the plantations.

Elevation Range:

Historical Distribution

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Not in flora
O'ahu Only found in cultivation
Molokai Naturalized
Lana'i Only found in cultivation
Kaho'olawe Only found in cultivation
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents

Forestry

Pollinators

Bibliography

Name Published In: Cat. Pl. Horti Camald., ed. 2: 20 (1832)

Other References

Wagner et al. 1990:951 (K, O, Mo, M, H); Staples & Herbst 2005:420 (KEY, DESCR); Note: changed to K?, O?, no nat. spms., Apr 2025

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Eucalyptus camaldulensis Tantalus, Oahu Preserved_Specimen Rock, J.F.C. 6056 Oahu BISH 1909-11-01
2 Eucalyptus camaldulensis Puu Moaula Preserved_Specimen Higashino, P.K. 8046 Kahoolawe BISH 1978-11-22
3 Eucalyptus camaldulensis Waipio Oahu Preserved_Specimen Russ, G.W. Oahu BISH 1929-08-01
4 Eucalyptus camaldulensis Wheeler Army Airfield, Schofield Plateau, Wahiawa, Oahu. Between old runway and sewage treatment facility In forested area Preserved_Specimen Trees to 75 ft ht. Leaves pale bluish-green. trunk smooth, bark occasionally peeling off in strips. Nagata, K.M. 1385 Oahu BISH 1976-10-27
5 Eucalyptus camaldulensis Puuwaawaa, Hawaii Preserved_Specimen Russ, G.W. Hawaii BISH 1929-01-01
6 Eucalyptus camaldulensis Kamuela, windbreak Planted windbreak Preserved_Specimen Habit: good form. Height: 30 ft. dbh: 8 in. Bark: deciduous in thin scales except bottom 4 ft persistent in coarse cracked plates Ewart III, G.R. 156 Hawaii BISH 1932-01-12
7 Eucalyptus camaldulensis Just outside Waimea town; along Kohala Road, inside a stone wall between the street and the Hale Kea property Roadside planting. Preserved_Specimen Tree ca 50' tall; trunk smooth, grayish, bark stringy; lvs fragrant when crushed; flws white. Herbst, D.R. 9278 Hawaii BISH 1991-01-09
8 Eucalyptus camaldulensis Schofield Barracks: Kolekole Avenue. One of a row of 56 mature trees extending from Fournier Ave. to Hewitt St Preserved_Specimen Tree ±70 ft. Bark light grey, shed in strings; flower white in clusters of 7; foliage dull medium green, crushed foliage with peppery-eucalptus odor. Herbst, D.R. 9861 Oahu BISH 1999-02-05
9 Eucalyptus camaldulensis Kualapuu Preserved_Specimen Branchy tree with thinnish bark Munro, G.C. 115 Molokai BISH 1927-06-28
10 Eucalyptus camaldulensis Piihonua, w. of Hilo. In plantation Preserved_Specimen Tree to 80 ft., 2 ft diam. Introduced Little Jr., E.L. 31068 Hawaii BISH 1976-08-17
11 Eucalyptus camaldulensis Honolulu: Manoa Valley; Lyon Arboretum; 26-2-2 Preserved_Specimen Height 60 ft. 12 inch dbh. Nagata, K.M. 548 Oahu BISH 1969-07-16
12 Eucalyptus camaldulensis Parker ranch, Waimea, Waikii (Waiki) Preserved_Specimen Like the Lalakoa weeping gum, but reddish on stem. Munro, G.C. 20 Hawaii BISH 1937-02-19
13 Eucalyptus camaldulensis Puu Moaula Preserved_Specimen 7-11 m x 45-60 cm Tao, D. Kahoolawe BISH 1982-01-19
14 Eucalyptus camaldulensis Lalakoa Preserved_Specimen Munro, G.C. 68 Lanai BISH 1926-07-30
15 Eucalyptus camaldulensis Kahuawaioa, Oahu Preserved_Specimen Mixed fl & fr. Single large juvenile lf.- E Russ, G.W. Oahu BISH 1929-01-01
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