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.
| Youman's stringybark | |
|---|---|
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| Eucalyptus youmanii near Uralla | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. youmanii
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| Binomial name | |
| Eucalyptus youmanii | |
| Synonyms[1] | |
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Description
editEucalyptus 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
editEucalyptus 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
editYouman's stringybark grows in woodland on poor soils from the Armidale-Guyra area in New South Wales to near Stanthorpe in Queensland.[2][3]
References
edit- ^ a b "Eucalyptus youmanii". Australian Plant Census. Retrieved 25 January 2020.
- ^ a b c K.Hill. "New South Wales Flora Online: Eucalyptus youmanii". Royal Botanic Gardens & Domain Trust, Sydney, Australia.
- ^ a b c "Eucalyptus youmanii". Euclid: Centre for Australian National Biodiversity Research. Retrieved 27 May 2020.
- ^ Chippendale, George M. "Eucalyptus youmanii". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 25 January 2020.
- ^ "Eucalyptus youmanii". APNI. Retrieved 25 January 2020.
- ^ 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.
- ^ "Youman, Thomas (1874-1962)". Council of Heads of Australasian Herbaria Australian National Herbarium. Retrieved 25 January 2020.