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Eucalyptus pilularis

Sm. (1797)

This name is accepted

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

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Description

Key Characters:

Growth Form: Trees 30–70 m tall.

Stems: Bark grayish brown, fibrous on most of trunk, white to yellowish gray and smooth above.

Roots:

Leaves: Leaves simple. Adult Alternate. Blades lanceolate, 9–16 cm long, 1.6–3 cm wide. Apex acuminate. Blades concolorous. Margins entire. Petioles 10–20 mm long. Stipules vestigial or absent.

Flowers: Flowers 7–15 in axillary, simple umbels, peduncles flattened, 10–17 mm long, pedicels 3–6 mm long. buds fusiform to clavate, 7–9 mm long, 3–5 mm wide. Flowers bisexual (perfect), actinomorphic. Calyx modified into an operculum; operculum conical or rostrate. Stamens numerous, in several whorls; anthers dithecal. Ovary inferior; ovule placentation axile.

Fruit: Fruit hemispherical to subglobose; 6–11 mm long; 7–11 mm wide; valves included or level. Seeds numerous.

Ploidy:

Habitat: Widely planted on Kaua'i; O'ahu; Moloka'i; Maui; and Hawai'i; and at least regenerating from seed in these areas.

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Naturalized
Maui Naturalized
Hawai'i Only found in cultivation

Dispersal Agents

Forestry

Pollinators

Bibliography

Name Published In: Trans. Linn. Soc. London 3: 284 (1797)

Other References

Wagner et al. 1990:957 (K, O, Mo, M, H); Oppenheimer 2008:30 (L); Note: changed to 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 pilularis Koloa District. Kalaheo, Kukulolono Golf Course, hillside above Papalina Road and east of main golf course forested area with planted Eucalyptus spp. And Casuarina, with Leucaena, Psidium, Schinus, Aleurites, and Non-native forested area with planted species of Eucalyptus and Casuarina, with naturalized Leucaena, Psidium, Schinus, Aleurites, and weedy understory. Preserved_Specimen Large tree 18-20 meters tall, 1.5 meters dbh, bark on basal 4-5 meter dark brown, rough and scaling in patches, upp0er trunk and branches with bark whitish, peeling in thin sheets. Leaves medium green, faint scent. Buds yellowish green, fruit gray brown. Lorence, D.H. 10815 Kauai BISH 2020-08-02
2 Eucalyptus pilularis Ekahanui. Central Waianae mountains. Lowland dry forest dominated by various Eucalyptus spp., Schinus terebinthifolius, and Toona ciliata. Also get various random Araucaria here and there. Understory mostly dominated by Rivinia humilis and Christella spp. Preserved_Specimen Big ass trees with rough bark on lower half of trunk. Upper section peeling off revealing smooth bark, grey-brown in color. Thomas, M.K. 549 Oahu BISH 2022-11-15
3 Eucalyptus pilularis Waimea District. Polibale Ridge above (E. of) Polihale State Park Disturbed native dry thicket on steep slopes with native remnants and forestry plantings. Preserved_Specimen Lorence, D.H. 5271 Kauai BISH 1987-06-09
4 Eucalyptus pilularis Waimea, Puu Ka Pele Forest Reserve, in Kaulaula Valley ( W side of Lapa Ridge and tree planting road) ridgetop with Eucalyptus Preserved_Specimen 10-12 m tree, bark smooth on upper half of tree, becoming rough in basal half. Flowers white. Leaves dull green, faintly aromatic Lorence, D.H. 5745 Kauai BISH 1988-01-27
5 Eucalyptus pilularis Waimea Preserved_Specimen Huge tree with big wide crown. Bark on lowest 15 ft. almost like a typical stringy-bark; above, blotched gum. Ewart III, G.R. 30 Hawaii BISH 1927-01-01
6 Eucalyptus pilularis Waimea Preserved_Specimen Lowest 10 ft. stringybark, gum above. Ewart III, G.R. 52 Hawaii BISH 1927-01-01
7 Eucalyptus pilularis Keaiwa Heiau State Rec. Area 10 mi NW of Honolulu Preserved_Specimen Large tree 80 feet, 20 inches diam., introduced. Little Jr., E.L. 31008 Oahu BISH 1976-08-05
8 Eucalyptus pilularis Waimea Canyon State Park. Along Highway 55, ca. 1/2 mile from lower fork of old and new highway Preserved_Specimen Straight tree to 20 meters; dbh 12 inches. Bark rough, dark on lower trunk, turning smooth at top. Fruit pedicellate, semiovate to nearly globular, thick, 9-13x9-12 mm. Spence, G. 411 Kauai BISH 1976-11-01
9 Eucalyptus pilularis Common in the area above Lanai City Preserved_Specimen Tall trees, bark reddish, with shallow furrows on trunk, upper branches smoother, with flakey grayish bark. Oppenheimer, H.L. 20709 Lanai BISH 2007-02-05
10 Eucalyptus pilularis East Maui, N of Makawao, 2555 Kokomo Rd. (private land holding) Preserved_Specimen Tree to 8m; trunk flexible; bark brown, soft Annable, C.R. 3902 Maui BISH 1999-02-06
11 Eucalyptus pilularis Pupukea Road Preserved_Specimen Tanabe, L. 15 Oahu BISH 1960-12-07
12 Eucalyptus pilularis Koolau Mountains; Maunalaha Trail, Makiki Valley Preserved_Specimen Ziegler, M.F. Oahu BISH 1987-05-28
13 Eucalyptus pilularis Kapapala Preserved_Specimen Russ, G.W. Hawaii BISH 1927-01-01
14 Eucalyptus pilularis Waialua Preserved_Specimen Russ, G.W. Oahu BISH 1929-01-01
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