Flora of North America species comparison

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Eucalyptus polyanthemos

Eucalyptus globulus

red box, silver dollar gum

blue gum, bluegum eucalyptus, Tasmanian bluegum
Habit Trees, to 25 m; trunk gray or tan, smooth or rough; bark rough, fibrous, and persistent, or smooth and shed in flakes or irregular strips. Trees, to 60 m; trunk bluish gray, straight, smooth; bark shed in irregular strips distally, sometimes persistent toward trunk base; twigs ± square or winged.
Leaves

petiole 1–2.5 cm;

blade grayish green, silver, or bluish green, round, elliptic, or ovate, 5–10 × 1.5–5 cm, surfaces occasionally glaucous.

mostly strongly aromatic;

petiole 1.5–2.5 cm, flattened;

blade green, usually narrowly lanceolate, often sickle-shaped, 10–30 × 2.5–4 cm.
Inflorescences

5–7-flowered, terminal or axillary, umbels in panicles.

flowers solitary, sessile or subsessile.
Peduncles

1–4 cm.

0.1–1 cm.
Flowers

hypanthium ovoid to obconic, ca. 4 mm, length ca. 2 times calyptra;

calyptra conic to hemispheric;

stamens white;

anthers rigid on filaments, adnate, absent on outer filaments.

hypanthium obconic, ± 4-ribbed, to 20 mm, glaucous;

calyptra flattened-hemispheric, with central knob, warty, glaucous;

stamens creamy white.
Capsules

ovoid or subpyriform, 5–6 mm, to 6 mm wide, glaucous;

valves 3 or 4, included.

hemispheric or obconic, ± 4-ribbed, 5–21 mm, glaucous, thickened, warty, rim wide;

valves 3–5, ± level with apex or exserted.
2n

= 22.

Eucalyptus polyanthemos

Eucalyptus globulus
Phenology Flowering winter–spring. Flowering fall–winter.
Habitat Disturbed coastal urban areas. Disturbed areas.
Elevation 0–200 m. (0–700 ft.) 0–300 m. (0–1000 ft.)
Distribution
from FNA
CA; se Australia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; se Australia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
Discussion

Eucalyptus polyanthemos is known from the San Joaquin Valley, Central Coast, San Francisco Bay Area, Outer South Coast Ranges, South Coast, Santa Catalina Islands, and Western Transverse Ranges.

Juvenile, adult, and transitional leaves are occasionally found in crowns of mature naturalized trees.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Eucalyptus globulus is known from the Outer North Coast Ranges, Great Central Valley, and central-western and southwestern California.

Eucalyptus globulus is commonly cultivated in warm regions of the world for its fast-growing timber and for paper pulp. The species is the tallest angiosperm in North America, easily recognized by the large, solitary flowers and fruit.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10. FNA vol. 10.
Parent taxa Myrtaceae > Eucalyptus Myrtaceae > Eucalyptus
Sibling taxa
E. camaldulensis, E. citriodora, E. cladocalyx, E. conferruminata, E. coolabah, E. globulus, E. grandis, E. mannifera, E. pulchella, E. robusta, E. sideroxylon, E. tereticornis, E. torelliana, E. viminalis
E. camaldulensis, E. citriodora, E. cladocalyx, E. conferruminata, E. coolabah, E. grandis, E. mannifera, E. polyanthemos, E. pulchella, E. robusta, E. sideroxylon, E. tereticornis, E. torelliana, E. viminalis
Name authority Schauer in W. G. Walpers: Repert. Bot. Syst. 2: 924. (1843) Labillardière: Voy. Rech. Pérouse 1: 153, plate 13. (1800)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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