Eucalyptus raveretiana
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Eucalyptus raveretiana |
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Eucalyptus raveretiana is a species ofthe myrtle family (Myrtaceae). It occurs on the east coast of Queensland and is called "Iron Gum Tree", "Thozet's Box" or "Black Ironbox".
description
Appearance and leaf
Eucalyptus raveretiana grows as a tree that reaches heights of 12 to 20 meters, rarely up to 30 meters. The bark remains on the entire trunk and the larger branches or on smaller branches and is gray or gray-brown and short-fibered. The bark of the upper branches is bluish to gray. There are oil glands both in the marrow and in the bark.
In Eucalyptus raveretiana is Heterophyllie ago. The leaves are mostly divided into a petiole and a leaf blade. The leaf stalks are narrowly flattened or channel-shaped. On young specimens, the leaf blade is egg-shaped with a length of 5 to 10 cm and a width of 2.5 to 5 cm. On medium-old specimens, the dull gray-green leaf blade is 6.2 to 7.5 cm long and 3.2 to 4.5 cm wide and is ovate or lanceolate, curved sickle-shaped and with entire margins. You can also be seated. The leaf blade on adult specimens has a different matt green color on the top and bottom and is 3.8 to 6.4 cm long and 2.5 to 4 cm wide, lanceolate, relatively thin, straight, tapering towards the base of the blade or is rounded there and has a pointed or blunt upper end. The side nerves, which are barely visible, extend from the median nerve at an acute or obtuse angle.
Inflorescence and flower
At the end of a 5 to 10 mm long, in cross section, pedicel-round inflorescence stem, there are about three to seven flowers together in a simple inflorescence . The flower stalks are up to 5 mm long. The not blue-green floured or frosted flower buds are egg-shaped or spindle-shaped with a length of 3 to 4 mm and a diameter of 1 to 1.5 mm. The sepals are reduced to four teeth on the flower cup (hypanthium). The smooth calyptra is hemispherical or conical, two to three times as long as the smooth flower cup and as wide as this. The flowers are white or creamy white.
Fruit and seeds
The stalked, small fruit is flat hemispherical and three- to fourfaced with a length and a diameter of 1 to 2 mm each. The disc is indented, the fruit fans stand out clearly. The seeds are ellipsoidal and brown. The hilum is in the middle.
Occurrence and endangerment
Eucalyptus raveretiana is found on the east coast of Queensland , from Gladstone in the south to Charters Towers in the north.
Eucalyptus raveretiana grows on moderately fertile, light loam soils with sufficient moisture, as they usually occur in river valleys or on the edge of rainforests .
Eucalyptus raveretiana was rated in 1997 in the IUCN Red List as "vulnerable" = "moderately endangered". No information is available on the current risk.
Taxonomy
The first description of Eucalyptus raveretiana was carried out in 1877 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae , Volume 10 (86), p 99. The type material , the label " In vallibus UDI silvaticis et secus ripas umbrosas Australiae orientalis capricornicae; O'Shanesy. " on. The specific epithet raveretiana received the species in honor of the French botanist MC Raveret-Wattel (1838-1916), who contributed to the introduction of the eucalyptus in Central Europe. A synonym for Eucalyptus raveretiana F. Muell. is Eucalyptus raveretiana F. Muell. var. raveretiana .
use
The heartwood of Eucalyptus raveretiana is dark brown-black, very hard and hard-wearing and has a specific weight of 1090 km / m³. The wood was previously used for railway sleepers and is now used to make heavy structures and fences .
Individual evidence
- ↑ a b Specimen search results: Eucalyptus raveretiana at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 5, 2013
- ↑ a b c d APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved March 5, 2013
- ↑ a b c d e f g h Eucalyptus raveretiana at EucaLink - A Web Guide to the Eucalypts . Retrieved March 5, 2013.
- ↑ a b c d e f g h i j k Black Ironbox - Eucalyptus raveretiana in: DJ Boland, MIH Brooker, GM Chippendale, N. Hall, BPM Highland, RD Johnston, DA Kleinig, MW McDonald & JD Turner (editors): Forest Trees of Australia . CSIRO Publishing. 5th Edition 2006. pp. 504-505 at Google Books . Accessed March 5, 2013 and not accessible on April 26.
- ↑ Magnoliopsida (Dicots): Myrtaceae: Eucalyptus in: Kerry S. Walter & Harriet J. Gillett (editors): 1997 IUCN Red List of Threatened Plants . The IUCN Species Survival Commission. 1997. p. 424 at Google Books . Retrieved March 5, 2013
- ↑ Eucalyptus raveretiana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 5, 2013.
- ↑ Rafaël Govaerts (ed.): Eucalyptus raveretiana. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 5, 2013.
