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Eucalyptus tereticornis

Sm. (1795)

This name is accepted

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

forest red gum

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Description

Key Characters:

Growth Form: Trees 20–50 m tall.

Stems: Bark white, gray, or bluish gray, smooth throughout.

Roots:

Leaves: Leaves simple. Adult Alternate. Blades narrowly lanceolate to lanceolate, 10–20 cm long, 1–2.7 cm wide. Apex acuminate. Blades concolorous. Margins entire. Petioles 13–24 mm long. Stipules vestigial or absent.

Flowers: Flowers 7–11 in axillary, simple umbels, peduncles 7–25 mm long, pedicels 3–10 mm long. buds conical, 10–16 mm long, 4–6 mm wide. Flowers bisexual (perfect), actinomorphic. Calyx modified into an operculum; operculum conical. Stamens numerous, in several whorls; anthers dithecal. Ovary inferior; ovules with axile placentation.

Fruit: Fruit subglobose or ovoid; 5–7 mm long; 4–8 mm wide; valves 4–5; exserted. Seeds numerous.

Ploidy: 2n = 22

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

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

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

Dispersal Agents

Wind
Forestry

Pollinators

Bibliography

Name Published In: Spec. Bot. New Holland 4: 41 (1795)

Other References

Wagner et al. 1990:958 (K, O, Mo, M, H); Staples & Herbst 2005:420 (KEY), 422 (DESCR); Note: change to O?, Mo?, H?, no nat. spms., Apr 2025

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Eucalyptus tereticornis Makiki, Roundtop Drive slopes Preserved_Specimen 15 m tree with weeping habit, very aromatic; flowers white Fosberg, F.R. 29488 Oahu BISH 1948-02-01
2 Eucalyptus tereticornis East Maui, Ulupalakua, adjacent to Tedeschi Winery, NW of Puu Mahoe Open mesic slope growing with Acacia mearnsii, Grevillea robusta; understory fairly open, mostly Eucalyptus leaf litter. Preserved_Specimen Part of a stand of 60 ft. tall trees; bark smooth, gray. Imada, C. 200229 Maui BISH 2002-07-16
3 Eucalyptus tereticornis East Maui, 2.2 km S of Makawao, on Olinda Rd Pasture with planted Eucalyptus grove. Preserved_Specimen Tree to 20cm; trunk smooth, with gray & white patches; bark peels off in strips Annable, C.R. 3901 Maui BISH 1999-02-06
4 Eucalyptus tereticornis Waimea Preserved_Specimen Foliage drooping and long drooping branchlets. Ewart III, G.R. 55 Hawaii BISH
5 Eucalyptus tereticornis Koele Preserved_Specimen Munro, G.C. 244 Lanai BISH 1927-11-16
6 Eucalyptus tereticornis East Maui, Makawao District, Ulupalakua, near Preserved_Specimen Tree with smooth, persistent, light gray; dark gray-green streaked bark; leathery, pendent, dark-green foliage; white flowers. Herbst, D.R. 851 Maui BISH 1968-01-04
7 Eucalyptus tereticornis Makawao Reserve Preserved_Specimen Inciong, H. 2 Maui BISH 1960-04-28
8 Eucalyptus tereticornis Honolulu, King St Preserved_Specimen Grant, M.L. 7360 Oahu BISH 1934-09-16
9 Eucalyptus tereticornis Ulupalakua Preserved_Specimen Inciong, H. 10 Maui BISH 1960-04-27
10 Eucalyptus tereticornis Koele Preserved_Specimen Munro, G.C. 66 Lanai BISH 1926-02-01
11 Eucalyptus tereticornis Parker Ranch, above Kukuihaele, by main road, where Waipio trail branches off, above the cliffs Preserved_Specimen Munro, G.C. 19 Hawaii BISH 1937-02-01
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