Eucalyptus dalrympleana

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Myrtales

Familia: Myrtaceae
Subfamilia: Myrtoideae
Tribus: Eucalypteae
Genus: Eucalyptus
Subgenus: E. subg. Symphyomyrtus
Sectio: E. sect. Maidenaria
Subsectio: E. subsect. Euryotae
Series: E. ser. Viminales
Subseries: E. subser. Circulares
Species: Eucalyptus dalrympleana
Subspecies: E. d. subsp. dalrympleana – E. d. subsp. heptantha
Name

Eucalyptus dalrympleana Maiden, Forest Fl. N.S.W. 7: 137 (1920), as "Eucalyptus Dalrympleana"

Type: W.A.W. de Beuzeville 1, 2, 3 (January 1920; Holotype: NSW [​NSW323711]; Possible [Iso]type: A 00069027(JSTOR) [under number '289', collected in December 1919]).
Type locality: [Australia.] New South Wales: [Peppercorn Plain], Yarrangobilly.

Distribution
Native distribution areas:

Continental: Australasia
Regional: Australia
New South Wales, Queensland, South Australia, Tasmania, Victoria

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Maiden, J.H. 1922. The Forest Flora of New South Wales, Vol. 7. Sydney: John Spence. BHL Reference page.

Additional references

Chippendale, G.M. 1988. Eucalyptus. In: Flora of Australia 19: 1–448; 495–507 (Appendix). AGPS. Online. Reference page. [see page 364.]

Links

IUCN: Eucalyptus dalrympleana Maiden (Least Concern) - Assessed by R. Fensham, T. Collingwood & B. Laffineur on 12 June 2019.
Slee, A.V., Brooker, M.I.H., Duffy, S.M. & West, J.G. 2020. Eucalyptus_dalrympleana_subsp._dalrympleana. EUCLID: Eucalypts of Australia. Fourth Edition. Accessed: 2022 October 14
Govaerts, R. et al. 2022. Eucalyptus dalrympleana in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 October 14. Reference page.
International Plant Names Index. 2022. Eucalyptus dalrympleana. Published online. Accessed: 14 October 2022.
USDA, ARS, Germplasm Resources Information Network. Eucalyptus dalrympleana in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names
English: Mountain (White) Gum
日本語: ダルリンプルユーカリ

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. Retrieved 21 May 2019.
"Eucalyptus dalrympleana". Euclid: Centre for Australian National Biodiversity Research. Retrieved 4 June 2020.
Brooker, M. Ian; Slee, Andrew V. "Eucalyptus dalrympleana". Royal Botanic Gardens Victoria. Retrieved 21 May 2019.
Hill, Ken. "Eucalyptus dalrympleana". Royal Botanic Garden Sydney. Retrieved 21 May 2019.
Chippendale, George M. "Eucalyptus dalrympleana". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 21 May 2019.
"Eucalyptus dalrympleana". APNI. Retrieved 21 May 2019.
"Beuzeville, Wilfred Alexander Watt de (1884 - 1954)". Australian National Herbarium. Retrieved 21 May 2019.
"Eucalyptus dalrympleana subsp. dalrympleana". Australian Plant Census. Retrieved 21 May 2019.
"Eucalyptus dalrympleana subsp. heptantha". Australian Plant Census. Retrieved 21 May 2019.
"Eucalyptus dalrympleana ssp. dalrympleana (Myrtaceae) Mountain White Gum". Seeds of South Australia. Retrieved 22 May 2019.
"Eucalyptus dalrympleana AGM". Royal Horticultural Society. Retrieved 19 June 2020.

"AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 36. Retrieved 18 February 2018.

Holliday, I. A field guide to Australian trees (3rd edition), Reed New Holland, 2002