Eucalyptus youmanii

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Youman's stringybark
Eucalyptus youmanii.jpg
Eucalyptus youmanii near Uralla
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. youmanii
Binomial name
Eucalyptus youmanii
Synonyms [1]
  • Eucalyptus prominulaL.A.S.Johnson & K.D.Hill
  • Eucalyptus sp. MAHCL
  • Eucalyptus stannicolaL.A.S.Johnson & K.D.Hill
  • Eucalyptus subtiliorL.A.S.Johnson & K.D.Hill
  • Eucalyptus youmaniBlakely & McKie orth. var.
  • Eucalyptus youmaniiBlakely & McKie var. youmanii
bark Eucalyptus youmanii bark.jpg
bark
flower buds Eucalyptus youmanii buds.jpg
flower buds
fruit Eucalyptus youmanii fruit.jpg
fruit

Eucalyptus youmanii, commonly known as Youman's stringybark, [2] is a species of small to medium-sized tree that is endemic to eastern Australia. It has rough, stringy bark on the trunk and branches, lance-shaped or curved adult leaves, flower buds in groups of seven, white flowers and hemispherical fruit.

Contents

Description

Eucalyptus youmanii is a tree that typically grows to a height of 20 m (66 ft) and forms a lignotuber. It has rough, stringy, greyish, furrowed bark on the trunk and branches. Young plants and coppice regrowth have leaves that are paler on the lower surface, egg-shaped to lance-shaped, 50–110 mm (2.0–4.3 in) long and 15–40 mm (0.59–1.57 in) wide. Adult leaves are slightly paler on the lower surface, lance-shaped to curved, 55–160 mm (2.2–6.3 in) long and 12–32 mm (0.47–1.26 in) wide on a petiole 7–20 mm (0.28–0.79 in) long. The flower buds are arranged in leaf axils in groups of seven on an unbranched peduncle 5–23 mm (0.20–0.91 in) long, the individual buds sessile or on pedicels up to 6 mm (0.24 in) long. Mature buds are oval, spindle-shaped or diamond-shaped, 7–9 mm (0.28–0.35 in) long and 4–5 mm (0.16–0.20 in) wide with a conical operculum. Flowering occurs in February and March and the flowers are white. The fruit is a woody hemispherical capsule 4–8 mm (0.16–0.31 in) long and 7–13 mm (0.28–0.51 in) wide with the valves protruding. [2] [3] [4]

Taxonomy and naming

Eucalyptus youmanii was first formally described in 1930 by William Blakely and Ernest McKie in Proceedings of the Linnean Society of New South Wales from material collected near Guyra in 1920. [5] [6] The specific epithet (youmanii) honours Thomas Youman (1874–1962), who, with Blakely and McKie, collected the type specimens on his farm. [3] [7]

Distribution and habitat

Youman's stringybark grows in woodland on poor soils from the Armidale-Guyra area in New South Wales to near Stanthorpe in Queensland. [2] [3]

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Eucalyptus imitans, commonly known as the Illawarra stringybark, is a species of small tree that is endemic to New South Wales. It has rough, stringy, greyish bark on the trunk and larger branches, lance-shaped, elliptic to egg-shaped or curved adult leaves, flower buds in groups of between nine and fifteen, white flowers and hemispherical fruit. It is found on near-coastal tablelands inland from the south coast.

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<i>Eucalyptus sphaerocarpa</i> Species of eucalyptus

Eucalyptus sphaerocarpa, commonly known as the Blackdown stringybark, is a species of tall forest tree that is endemic to Queensland. It has rough, stringy bark on the trunk and branches, lance-shaped to curved adult leaves, flower buds in groups of seven, nine or eleven, white flowers and shortened spherical fruit.

References

  1. 1 2 "Eucalyptus youmanii". Australian Plant Census. Retrieved 25 January 2020.
  2. 1 2 3 K.Hill. "New South Wales Flora Online: Eucalyptus youmanii". Royal Botanic Gardens & Domain Trust, Sydney, Australia.
  3. 1 2 3 "Eucalyptus youmanii". Euclid: Centre for Australian National Biodiversity Research. Retrieved 27 May 2020.
  4. Chippendale, George M. "Eucalyptus youmanii". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 25 January 2020.
  5. "Eucalyptus youmanii". APNI. Retrieved 25 January 2020.
  6. Blakely, William F.; McKie, Ernest N. (1930). "Additions to the flora of New England, N.S.W." Proceedings of the Linnean Society of New South Wales. 55 (5): 590–591.
  7. "Youman, Thomas (1874-1962)". Council of Heads of Australasian Herbaria Australian National Herbarium. Retrieved 25 January 2020.