Plants of South Eastern New South Wales
Eucalyptus umbra
Broad-leaved white mahogany
Myrtaceae
Dry forest and woodland. Sydney area and north.
Tree to 25 m tall, rarely a shrub to 4 m tall. Bark rough on all but the smallest branches or throughout, thin, stringy or fibrous, grey to red-brown or brown. Juvenile stems rounded in cross section. Juvenile leaves stem-clasping and opposite each other for at least 10 to 13 pairs, 8–20 cm long, 35–100 mm wide, then alternating up the stems and stalked, glossy, green. Adult leaves alternating up the stems, 6–18 cm long, 15–45 mm wide, glossy or dull, green. Flowers white, with 0 petals. Flowers in 7 to about 15 flowered clusters, forming compound clusters at the ends of the branchlets, or in single flower clusters at the bases of the leaves. Mature flower buds 7-9 mm long, caps shorter than the base. Flowers spring-summer. Gumnuts 6-10 mm in diameter. Gumnuts that have dropped their seed have protruding valves or valves that are not very noticeable.
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~umbra (accessed 22 January, 2021)
EUCLID description: https://apps.lucidcentral.org/euclid/text/entities/eucalyptus_umbra.htm (accessed 22 January, 2021)
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