Eucalyptus platyphylla
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Eucalyptus platyphylla |
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Eucalyptus platyphylla is a species ofthe myrtle family (Myrtaceae). It occurs in the east and northeast of Queensland and is called "Broad-leaved Poplar Gum", "Poplar Gum" or "White Gum" there.
description
Appearance and leaf
Eucalyptus platyphylla grows as a tree that reaches heights of growth from 7 to over 20 meters and a breast height diameter (DHL) of around 0.7 meters. The bark remains on the entire tree and is white or creamy white on young specimens. It later turns salmon or orange in color. There are oil glands both in the marrow and in the bark.
In Eucalyptus platyphylla , heterophyllia is present. The leaves are always divided into a petiole and a leaf blade. On young specimens, the dull green to gray-green leaf blade with a length of 20 to 25 cm and a width of 4.5 to 7 cm is egg-shaped to almost circular, often also delta or heart-shaped. On medium-old specimens, the leaf blade is 9 to 16 cm long and 5.0 to 5.5 cm wide and lanceolate to ovate, straight, with entire margins and dull green. The leaf blades, which are almost the same color on the top and bottom, are dull green leaf blades on adult specimens with a length of 11 to 14 cm and a width of 3 to 5 cm, lanceolate, elliptical or circular, relatively thin, straight, rounded at the base of the blade and blunt or rounded top. The raised lateral nerves branch off from the median nerve in a pointed shape. The cotyledons ( cotyledons ) are upside-kidney-shaped.
Inflorescence and flower
On the side of a 4 to 14 mm long and in cross-section pedunculate or slightly square inflorescence stem, three to seven flowers stand together in a simple inflorescence . The flower stalks are - if available - 1 to 7 mm long and angular. The flower buds are spherical and not floured or frosted blue-green. The sepals form a calyptra that falls off early. The smooth calyptra is hemispherical or conical, one to three times as long as the smooth flower cup (hypanthium) and as wide as this. The flowers are white or creamy white.
Fruit and seeds
The mostly stalked fruit is hemispherical or spindle-shaped and three to four-faced. The disc is pressed in, the fruit compartments are level with the rim. The seeds are elongated, cubic or pyramidal in shape with serrated edges and gray-black. The hilum is at the top.
Occurrence
Eucalyptus platyphylla is found only in the northeast and east of Queensland , from Rockhampton in the south to Cape York in the north.
Eucalyptus platyphylla grows in sparse forests together with other eucalyptus species, best in hill country and near watercourses.
Taxonomy
The first description of Eucalyptus platyphylla in 1859 by Ferdinand von Mueller , entitled Monograph of the Eucallypti of tropical Australia in the Journal of the Proceedings of the Linnean Socitety, Botany , Volume 3, page 93. The type material has the inscription " In pascuis fertilibus ad flumen burdekin. Sept. – Nov. " on. The specific epithet platyphylla is derived from the Greek word platyphyllos for broad-leaved. A synonym for Eucalyptus platyphylla F. Muell. are Eucalyptus platyphylla F.Muell. var. platyphylla , Eucalyptus platyphylla var. tintinnans Blakely & Jacobs , Eucalyptus tintinnans (Blakely & Jacobs) LASJohnson & KDHill .
use
The heartwood of Eucalyptus platyphylla is pink-brown to red-brown, medium-hard and has a specific weight of 940 to 1090 km / m³. It is occasionally used as firewood.
Individual evidence
- ↑ a b Specimen search results: Eucalyptus platyphylla at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 4, 2013
- ↑ a b c d APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved March 4, 2013
- ↑ a b c d e f g h i Eucalyptus platyphylla at EucaLink - A Web Guide to the Eucalypts . Retrieved March 4, 2013.
- ↑ a b c d e f g h i j k l m 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. White Gum - Poplar Gum - Eucalyptus platyphylla on pp. 312-313. at google-books online . Retrieved March 4, 2013
- ↑ Eucalyptus platyphylla at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 4, 2013.
- ↑ Rafaël Govaerts (Ed.): Eucalyptus platyphylla. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 4, 2013.
