Eucalyptus umbra
{{Short description|Species of eucalyptus}}
{{Use dmy dates|date=July 2019}}
{{speciesbox
|name = Broad-leaved white mahogany
|image = Eucalyptus umbra.jpg
|image_caption = Eucalyptus umbra near Gympie
|genus = Eucalyptus
|species = umbra
|status_system =
|status =
|authority = R.T.Baker{{cite web|title=Eucalyptus umbra|url= https://biodiversity.org.au/nsl/services/apc-format/display/89062|publisher=Australian Plant Census|access-date=12 January 2020}}
}}
File:Eucalyptus umbra - Elvina Track.jpg)]]
File:Eucalyptus umbra fruit.jpg
Eucalyptus umbra, known as the broad-leaved white mahogany,{{cite web |title=Eucalyptus umbra|work= PlantNET - NSW Flora Online|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~umbra|access-date=2010-02-24}} is a species of small to medium-sized tree that is endemic to northern New South Wales. It has rough, fibrous to stringy bark on the trunk and branches, lance-shaped to curved adult leaves, flower buds in groups of seven to fifteen, white flowers and cup-shaped to hemispherical fruit.
Description
Eucalyptus umbra is a tree that typically grows to a height of {{cvt|25|m}} and forms a lignotuber. Young plants and coppice regrowth have sessile leaves that are broadly egg-shaped to lance shaped, {{cvt|80-200|mm}} long, {{cvt|35-100|mm}} wide, held horizontally and arranged in opposite pairs with the bases surrounding the stem. Adult leaves are arranged alternately, the same shade of green on both sides, lance-shaped to curved, {{cvt|60-180|mm}} long and {{cvt|15-45|mm}} wide, tapering to a petiole {{cvt|10-20|mm}} long. The flower buds are mostly arranged in panicles on the ends of branchlets on a peduncle {{cvt|6-20|mm}} long, the individual buds on pedicels {{cvt|3-7|mm}} long. Mature buds are oval, about {{cvt|6|mm}} long and {{cvt|3-4|mm}} wide with a conical to beaked operculum. Flowering occurs from September to February and the flowers are white. The fruit is a woody cup-shaped to hemispherical capsule {{cvt|3-7|mm}} long and {{cvt|6-10|mm}} wide with the valves near rim level or below it.{{cite web |title=Eucalyptus umbra |url=https://apps.lucidcentral.org/euclid/text/entities/eucalyptus_umbra.htm |publisher=Euclid: Centre for Australian National Biodiversity Research |access-date=28 May 2020}}{{cite web |last1=Chippendale |first1=George M. |title=Eucalyptus umbra |url=https://profiles.ala.org.au/opus/foa/profile/Eucalyptus%20umbra |publisher=Australian Biological Resources Study, Department of the Environment and Energy, Canberra |access-date=12 January 2020}}{{cite book |last1=Boland |first1=Douglas J. |last2=Brooker |first2=M. Ian H. |last3=Chippendale |first3=George M. |last4=Hall |first4=Norman |last5=Hyland |first5=Bernard P.M. |last6=Johnston |first6=Robert D. |last7=Kleinig |first7=David A. |last8=McDonald |first8=Maurice W. |last9=Turner |first9=John D. |title=Forest trees of Australia |date=2006 |publisher=CSIRO Publishing |location=Collingwood, Victoria |isbn=0643069690 |page=524 |edition=5th}}
Taxonomy and naming
Eucalyptus umbra was first formally described in 1901 by Richard Thomas Baker in Proceedings of the Linnean Society of New South Wales.{{cite web|title=Eucalyptus umbra|url= https://id.biodiversity.org.au/instance/apni/455360 |publisher=APNI|access-date=12 January 2020}}{{cite journal |last1=Baker |first1=Richard Thomas |title=On some new species of Eucalyptus |journal=Proceedings of the Linnean Society of New South Wales |date=1901 |volume=25 |issue=4 |pages=687–689 |doi=10.5962/bhl.part.12184 |url=https://www.biodiversitylibrary.org/item/30484#page/757/mode/1up |access-date=12 January 2020|doi-access=free }} The specific epithet is a Latin word meaning "shade" or "shadow", possibly referring to the shade provided by the tree.
Distribution and habitat
The broad-leaved white mahogany occurs in the high rainfall coastal areas of New South Wales between Sydney and Grafton. It grows in dry sclerophyll forest or woodland, usually on poor shallow dry soils. It differs from the white mahogany (Eucalyptus latisinensis) of coastal Queensland in having broader juvenile leaves.
Eucalyptus umbra is part of the white mahogany group as recognised by Ken Hill. Others in the group include E. acmenoides, E. mediocris, E. carnea, E. apothalassica, E. helidonica, E. psammitica and E. latisinensis.{{cite web|url=https://www.anbg.gov.au/cpbr/cd-keys/euclid3/euclidsample/html/White_mahoganies.htm|title=More about White Mahoganies|access-date=28 October 2018|work=Euclid|publisher=CSIRO|archive-date=14 April 2019|archive-url=https://web.archive.org/web/20190414224938/https://www.anbg.gov.au/cpbr/cd-keys/euclid3/euclidsample/html/White_mahoganies.htm|url-status=dead}}
References
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Category:Myrtales of Australia
Category:Flora of New South Wales