Flora of North America species comparison

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Eucalyptus robusta

Eucalyptus coolabah

swamp mahogany

coolibah
Habit Trees, to 30 m; trunk reddish brown, rough; bark persistent, deeply furrowed, soft, spongy, fibrous, rough on small branches. Trees, to 10 m; trunk grayto tan, rough; bark fissured.
Leaves

petiole 1.5–3 cm, slightly flattened;

blade lighter green abaxially, broadly lanceolate, 8.5–17 × 2.5–7 cm, surfaces glossy.

petiole 1.4–2 cm;

blade dull bluish gray-green, narrowly lanceolate, 8–17 × 0.8–2.5 cm, surfaces rarely glaucous.
Inflorescences

9–15-flowered, umbels.

7-flowered, terminal, umbels in panicles.
Peduncles

broadly flattened, 1.5–3 cm.

0.5–2.8 cm.
Flowers

hypanthium obconic to pyriform, 6–7 mm, length ± equaling calyptra;

calyptra conic to rostrate, 10–12 mm;

stamens white.

hypanthium obconic, ± 2 mm, length ± equaling calyptra;

calyptra obconic, apiculate;

stamens white.
Capsules

cylindric, 10–18 mm, not glaucous;

valves 3 or 4, fused after dehiscence, ± level with apex or included and joined across orifice.

hemispheric, 3–5 mm, to 6 mm wide;

valves 3 or 4, exserted.

Eucalyptus robusta

Eucalyptus coolabah
Phenology Flowering summer–fall. Flowering spring–summer.
Habitat Disturbed areas. Urban ephemeral water­ways.
Elevation 0–200 m. (0–700 ft.) 300–400 m. (1000–1300 ft.)
Distribution
from FNA
CA; FL; e Australia [Introduced in North America]
[BONAP county map]
from FNA
AZ; n Australia [Introduced in North America]
Discussion

Eucalyptus robusta is known from Los Angeles, Monterey, Orange, San Diego, San Luis Obispo, Santa Barbara, Santa Cruz, and Ventura counties in California, and from Charlotte, Lee, Martin, and St. Lucie counties in Florida.

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

Eucalyptus coolabah is an escape along the occasionally flooded Salt River and its tributaries near Phoenix. It is similar to E. microtheca F. Mueller and commonly sold under that name.

(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. polyanthemos, E. pulchella, E. sideroxylon, E. tereticornis, E. torelliana, E. viminalis
E. camaldulensis, E. citriodora, E. cladocalyx, E. conferruminata, E. globulus, E. grandis, E. mannifera, E. polyanthemos, E. pulchella, E. robusta, E. sideroxylon, E. tereticornis, E. torelliana, E. viminalis
Name authority Smith: Spec. Bot. New Holland, 39, plate 13. (1795) Blakely & Jacobs in W. F. Blakely: Key Eucalypts, 245. (1934)
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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