Английская Википедия:Eucalyptus cadens

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Eucalyptus cadens, commonly known as the tumble-down swamp gum or Warby Range swamp-gum is a small to medium-sized tree that is endemic to a small area in north-eastern Victoria, Australia. It has rough, compacted bark on the trunk and larger branches, smooth bark above, narrow elliptic to lance-shaped adult leaves, flower buds in groups of seven, white flowers and conical fruit.

Файл:Eucalyptus cadens buds.jpg

flower buds

Файл:Eucalyptus cadens fruit.jpg

fruit

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bark

Description

Eucalyptus cadens is a spreading tree that grows to a height of Шаблон:Convert with a characteristic leaning habit, and forms a lignotuber. The bark on the lower Шаблон:Convert of the trunk is rough, compacted and greyish brown to black. The higher parts of the trunk and branches have some greyish green bark, often with a few ribbons of shed bark. Young plants and coppice regrowth have elliptic to oblong leaves, Шаблон:Convert long, Шаблон:Convert wide and have a petiole. Adult leaves are narrow elliptic to lance-shaped or curved, the same colour on both sides, Шаблон:Convert long and Шаблон:Convert wide with a petiole Шаблон:Convert long. The flower buds are arranged in groups of seven in leaf axils on a peduncle Шаблон:Convert long, the individual buds on a pedicel Шаблон:Convert. Mature buds are oval, spindle-shaped or diamond-shaped with a conical or slightly beaked operculum Шаблон:Convert long. Flowering occurs between March and June and the flowers are white. The fruit is a woody, conical capsule Шаблон:Convert long and Шаблон:Convert wide that is either sessile or on a pedicel up to Шаблон:Convert long. The valves protrude beyond the rim of the capsule.

Taxonomy and naming

Eucalyptus cadens was first formally described in 1989 by Barbara Briggs and Michael Crisp from a specimen at "the eastern foot of the Warby Range, between Wangaratta and Glenrowan". The specific epithet (cadens) is the present participle of the Latin word cado meaning "to fall", hence "falling", referring to the leaning habit of this species.

Distribution and habitat

Tumble-down swamp gum grows in woodlands, often in or around springs, soaks and waterbodies in the south-eastern foothills of the Pilot Range near Beechworth and Wooragee and in the eastern foothills of the Warby Range.

Conservation

Eucalyptus cadens is classified as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and the Victorian Government Flora and Fauna Guarantee Act 1988. The main threats to the species include grazing by domestic stock, weed invasion and changes in hydrology.