Flora of North America species comparison

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Eucalyptus polyanthemos

Eucalyptus cladocalyx

red box, silver dollar gum

sugar 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, 20 m; trunk white, often mottled gray, orange, or tan, mostly straight, graceful, ± smooth; bark shed in large, irregular patches.
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 0.1–0.2 cm;

blade light green abaxially, ± widely lanceolate, 8–15 × 2–3 cm.
Inflorescences

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

mostly 7–11-flowered, umbels, usually on leafless branches.
Peduncles

1–4 cm.

1–3 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 cylindrical or urn-shaped, ± ribbed, less than 10 mm, length 3–4 times calyptra;

calyptra cylindric to urn-shaped, abruptly pointed;

stamens white.
Capsules

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

valves 3 or 4, included.

± urn-shaped, ribbed, 10–15 mm, not glaucous;

valves 3 or 4, included.

Eucalyptus polyanthemos

Eucalyptus cladocalyx
Phenology Flowering winter–spring. Flowering spring–summer.
Habitat Disturbed coastal urban areas. Disturbed 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; s 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.)

Eucalyptus cladocalyx is commonly cultivated in southern California.

Eucalyptus corynocalyx F. Mueller is an illegitimate name based on the same type as E. cladocalyx. Mueller may have thought corynocalyx (club-calyx) was a more appropriate name than cladocalyx (branch-calyx) and intended to change the name. The closed bud of this species is clublike.

(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. conferruminata, E. coolabah, E. globulus, 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) F. Mueller: Linnaea 25: 388. (1853)
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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