Flora of North America species comparison

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Eucalyptus polyanthemos

Eucalyptus sideroxylon

red box, silver dollar gum

red iron bark
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 25 m; trunk dark brown or ± black, rough; bark persistent, deeply furrowed, hard.
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.

petiole 1–2 cm;

blade dull grayish green or blue-green, lanceolate, 6–14 × 1–2 cm.
Inflorescences

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

3–7-flowered, umbels, often pendent.
Peduncles

1–4 cm.

subterete, 1–1.5 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 ovoid to hemispheric, 4–6 mm, length greater than calyptra, occasionally glaucous;

calyptra conic;

stamens white, pink, or red;

anthers absent on outer filaments.
Capsules

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

valves 3 or 4, included.

ovoid, 10 mm, glaucous or not;

valves 4 or 5, included.

Eucalyptus polyanthemos

Eucalyptus sideroxylon
Phenology Flowering winter–spring. Flowering spring.
Habitat Disturbed coastal urban areas. Disturbed coastal, urban areas.
Elevation 0–200 m. (0–700 ft.) 0–200 m. (0–700 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]
[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.)

In the flora area, Eucalyptus sideroxylon is known from southern California.

(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. globulus, E. grandis, E. mannifera, E. polyanthemos, E. pulchella, E. robusta, E. tereticornis, E. torelliana, E. viminalis
Name authority Schauer in W. G. Walpers: Repert. Bot. Syst. 2: 924. (1843) A. Cunningham ex Woolls: Proc. Linn. Soc. New South Wales, ser. 2, 1: 859. (1887)
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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