Eucalyptus haemastoma
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Eucalyptus haemastoma |
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Eucalyptus haemastoma is a species ofthe myrtle family (Myrtaceae). It occurs only in the central section of the coast of New South Wales and is called "Scribbly Gum", "Broad-leaved Scribbly Gum", "White Gum" or "Snappy Gum" there.
description
Appearance and leaf
Eucalyptus haemastoma grows as a tree that can reach heights of up to 15 meters. The bark is smooth with scribbles all over the tree, white, gray or yellow, and peels in short ribbons. The young twigs have green bark . There are no oil glands in the marrow of the young branches or in the bark.
In Eucalyptus haemastoma is Heterophyllie ago. The leaves are always divided into a petiole and a leaf blade. The petioles are narrowly flattened or channel-shaped with a length of 10 to 20 mm. The leaf blade on young specimens is ovate and dull gray-green. In middle-aged specimens, the leaf blade is egg-shaped, sickle-shaped, with a full margin and a dull gray-green, with a length of about 22 cm and a width of about 8 cm. The green or gray-green foliage leaves of the same color on the upper and lower sides of adult specimens are 12 to 15 cm long and 1.5 to 4 cm wide, broadly lanceolate, relatively thick, crescent-shaped, and tapering to the base of the blades and have a pointed upper end. The side nerves, which are barely recognizable, extend from the middle nerve at medium distances at an acute angle at large distances. The cotyledons ( cotyledons ) are kidney-shaped.
Inflorescence and flower
On the side of an inflorescence stem with a length of 12 to 25 mm and a width of up to 3 mm in cross-section narrowly flattened or angular inflorescence stem stand together in a simple inflorescence eleven or more flowers. The 3 to 6 mm long pedicels are stalk-round. The flower buds that are not floured blue-green or frosted are egg-shaped or club-shaped with a length of 6 to 8 mm and a diameter of 4 to 5 mm. The sepals form a calyptra that remains in place until flowering ( anthesis ). The smooth calyptra is hemispherical or conical, just as long as the smooth flower cup (hypanthium) or shorter and narrower than this. The outer stamens are sterile. The flowers are creamy white or yellow.
fruit
The stalked fruit is conical or pear-shaped and quadruple with a length and a diameter of 6 to 9 mm each. The disc is flat or slightly raised, the fruit compartments are enclosed or are level with the edge.
Occurrence
The natural range of Eucalyptus haemastoma is the central part of the coast of New South Wales , around Sydney and Newcastle , from Lake Macquarie to the Royal National Park .
Eucalyptus haemastoma often grows locally in dry hard deciduous forests on flat, barren sandy soils over sandstone .
Systematics
The first description of Eucalyptus haemastoma was made in 1797 by James Edward Smith titled Botanical character of Some Plants of the Natural Order of Myrti in Transactions of the Linnean Society of London , Volume 3, page 286. synonyms of Eucalyptus haemastoma Sm. Are Eucalyptus haemastoma Sm. Subsp. haemastoma and Eucalyptus haemastoma Sm. var. haemastoma .
Intergradations with Eucalyptus racemosa were mainly observed south of Sydney. Eucalyptus haemastoma forms natural hybrids with Eucalyptus piperita subsp. piperita , Eucalyptus umbra and Eucalyptus camfieldii . The “Australian Plant Name Index” mentions a variety as a hybrid: Eucalyptus haemastoma var. × montana H.Deane & Maiden.
Individual evidence
- ↑ a b Specimen search results: Eucalyptus haemastoma at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 19, 2013
- ↑ a b c d e APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved March 19, 2013
- ↑ a b c d e f g h i j K. Hill: Eucalyptus haemastoma DC. at New South Wales Flora Online . National Herbarium of NSW, Royal Botanic Garden, Sydney. Retrieved March 19, 2013
- ↑ a b c d e f g h i j k Eucalyptus haemastoma at EucaLink - A Web Guide to the Eucalypts . Retrieved March 19, 2013.
- ↑ Eucalyptus haemastoma at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 19, 2013.
- ↑ Rafaël Govaerts (Ed.): Eucalyptus haemastoma. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 19, 2013.
