Flora of North America species comparison

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Eucalyptus polyanthemos

Eucalyptus citriodora

red box, silver dollar gum

lemon-scented gum
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 35 m; trunk golden becoming tan, straight, slender, graceful, smooth; bark shed in irregular pieces.
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.

lemon-scented;

petiole 1–2 cm;

blade green, lanceolate, often falcate, 10–20 × 1–2 cm.
Inflorescences

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

3–5-flowered, umbels in panicles.
Peduncles

1–4 cm.

terete, 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 hemispheric, 5–6 mm, length more than calyptra;

calyptra mostly rostrate;

stamens white.
Capsules

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

valves 3 or 4, included.

urn-shaped, to 15 mm, not glaucous;

valves 3 or 4, included.
2n

= 22, 44.

Eucalyptus polyanthemos

Eucalyptus citriodora
Phenology Flowering winter–spring. Flowering winter–spring.
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; e Australia [Introduced in North America]
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 citriodora is often treated as Corymbia citriodora; it is found only in southern coastal and urban areas and is commonly cultivated.

(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. cladocalyx, E. conferruminata, E. coolabah, E. globulus, E. grandis, E. mannifera, E. polyanthemos, E. pulchella, E. robusta, E. sideroxylon, E. tereticornis, E. torelliana, E. viminalis
Synonyms Corymbia citriodora, E. maculata var. citriodora
Name authority Schauer in W. G. Walpers: Repert. Bot. Syst. 2: 924. (1843) Hooker in T. L. Mitchell: J. Exped. Trop. Australia, 235. (1848)
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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