Biology:Eucalyptus dalrympleana
| Mountain gum | |
|---|---|
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| Eucalyptus dalrympleana in a botanical garden in Brest, France | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. dalrympleana
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| Binomial name | |
| Eucalyptus dalrympleana Maiden[1]
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Eucalyptus dalrympleana, commonly known as mountain gum, mountain white gum, white gum and broad-leaved ribbon gum,[2] is a species of tree that is endemic to southeastern Australia. It has smooth bark, lance-shaped adult leaves, flower buds in groups of three or seven, white flowers and cup-shaped, bell-shaped or hemispherical fruit.
Description
Eucalyptus dalrympleana is a tree that typically grows to a height of 40 m (130 ft) and forms a lignotuber. It has smooth white to yellowish bark, sometimes with a short stocking of rough bark. Young plants and coppice regrowth have leaves arranged in opposite pairs and are egg-shaped or heart-shaped to more or less round, 25–70 mm (0.98–2.76 in) long and wide. Adult leaves are arranged alternately, lance-shaped to curved, the same colour on both sides, 80–220 mm (3.1–8.7 in) long and 10–40 mm (0.39–1.57 in) wide on a petiole 12–35 mm (0.47–1.38 in) long. The flower buds are arranged in groups of three or seven in leaf axils on a peduncle 3–12 mm (0.12–0.47 in) long, the individual buds sessile or on a pedicel up to 3 mm (0.12 in) long. Mature buds are oval, green to yellow, 6–10 mm (0.24–0.39 in) long and 3–6 mm (0.12–0.24 in) wide with a conical to rounded operculum. Flowering mainly occurs between March and June and the flowers are white. The fruit is a woody cup-shaped, bell-shaped or hemispherical capsule 3–8 mm (0.12–0.31 in) long and 5–9 mm (0.20–0.35 in) wide.[2][3][4][5]
Taxonomy and naming
Eucalyptus dalrympleana was first formally described in 1920 by Joseph Maiden from a specimen collected by Wilfred de Beuzeville near Yarrangobilly. The description was published in Maiden's book, The Forest Flora of New South Wales.[6][7] The specific epithet (dalrympleana) honours the forester, Richard Dalrymple Hay.[2]
In 1962, Lawrie Johnson described two subspecies and the names have been accepted by the Australian Plant Census:
- Eucalyptus dalrympleana Maiden subsp. dalrympleana[8] has flower buds arranged in groups of three;[4]
- Eucalyptus dalrympleana subsp. heptantha L.A.S.Johnson[9] has flower buds and flowers in groups of seven.[4]
Distribution and habitat
Mountain gum grows in woodland and forest at higher elevations in far south-eastern Queensland, New South Wales, Victoria, South Australia and Tasmania. Subspecies heptantha is only found in far south-eastern Queensland and on the northern tablelands of New South Wales. Subspecies dalrympleana occurs south from the central and southern tablelands of New South Wales.[3][4] The species is rare in South Australia where it only occurs in the Mount Lofty Ranges.[10]
Use in horticulture
In cultivation in the UK, E. dalrympleana is fully hardy down to −15 °C (5 °F) but prefers some shelter. It grows best in full sun. It has gained the Royal Horticultural Society's Award of Garden Merit.[11][12]
References
- ↑ "Eucalyptus dalrympleana". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/69806.
- ↑ 2.0 2.1 2.2 "Eucalyptus dalrympleana". Euclid: Centre for Australian National Biodiversity Research. https://apps.lucidcentral.org/euclid/text/entities/eucalyptus_dalrympleana_subsp._dalrympleana.htm.
- ↑ 3.0 3.1 Brooker, M. Ian; Slee, Andrew V.. "Eucalyptus dalrympleana". Royal Botanic Gardens Victoria. https://vicflora.rbg.vic.gov.au/flora/taxon/b1be1c09-c69b-4e2d-8d10-2aa76bae121e.
- ↑ 4.0 4.1 4.2 4.3 Hill, Ken. "Eucalyptus dalrympleana". Royal Botanic Garden Sydney. http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~dalrympleana.
- ↑ Chippendale, George M.. "Eucalyptus dalrympleana". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. https://profiles.ala.org.au/opus/foa/profile/Eucalyptus%20dalrympleana.
- ↑ "Eucalyptus dalrympleana". APNI. https://id.biodiversity.org.au/instance/apni/454919.
- ↑ "Beuzeville, Wilfred Alexander Watt de (1884 - 1954)". Australian National Herbarium. http://www.anbg.gov.au/biography/beuzeville-wilfred.html.
- ↑ "Eucalyptus dalrympleana subsp. dalrympleana". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/69821.
- ↑ "Eucalyptus dalrympleana subsp. heptantha". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/69839.
- ↑ "Eucalyptus dalrympleana ssp. dalrympleana (Myrtaceae) Mountain White Gum". Seeds of South Australia. https://spapps.environment.sa.gov.au/SeedsOfSA/speciesinformation.html?rid=1811.
- ↑ "Eucalyptus dalrympleana AGM". Royal Horticultural Society. https://www.rhs.org.uk/Plants/32644/Eucalyptus-dalrympleana/Details.
- ↑ "AGM Plants - Ornamental". Royal Horticultural Society. July 2017. p. 36. https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf.
- Holliday, I. A field guide to Australian trees (3rd edition), Reed New Holland, 2002
Wikidata ☰ Q159839 entry
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