Акация опушенная
| Дауни Плетно | |
|---|---|
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Научная классификация 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Caesalpinioideae |
| Clade: | Mimosoid clade |
| Genus: | Acacia |
| Species: | A. pubescens
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| Binomial name | |
| Acacia pubescens | |
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| Occurrence data from AVH | |
| Synonyms | |
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Racosperma pubescens (Vent.) Pedley | |
Acacia pubescens , также известный как пухлый прерыватель , является видом кражина, найденного в бассейне Сиднея в восточном Новом Южном Уэльсе. Пуховое плетение классифицируется как уязвимое; Большая часть его среды обитания исчезла с ростом города Сидней. Как и со всеми ватлами, он имеет составные ( листовые ) стебли листьев.
Описание
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Acacia Pubescens растет как кустарник до небольшого дерева от 1 до 5 м (от 3 до 20 футов) высотой. Гладкая кора серо-коричневого цвета, а ветви могут иметь слегка пониженную или плачущую привычку . Как и во всех ватлах, у нижней части коса есть листоподобные структуры, известные как филлоды , которые являются соединением (сын), и измеряют 1,5–6,5 см (0,59–2,56 дюйма) с 3 до 12 пар меньших листьев »или посуды, каждый 0,5 –2,5 см (0,20–0,98 дюйма) длиной, а сами - составные - состоит из 5-20 пар вершины.
Arranged in racemes, the globular yellow flowers appear from late winter to spring (August to October),[2] peaking in September. Each flower head contains 12 to 20 flowers. Flowering is followed by the development of 3–7 cm long seed pods, which ripen over October to December.[3]
Taxonomy
[edit]French botanist Étienne Pierre Ventenat described the downy wattle in 1803, in his Jardin de la Malmaison as Mimosa pubescens.[4] It had been grown at the Château de Malmaison in the garden of the Empress Joséphine de Beauharnais.[5] Robert Brown gave it its current name in 1813 in Hortus Kewensis.[6] Common names include downy wattle and hairy-stemmed wattle.[6] Derived from the Latin pubescens "hairy", the species name relates to the hairy stems.[2] English botanist George Bentham classified A. pubescens in the series Botrycephalae in his 1864 Flora Australiensis.[7] Queensland botanist Les Pedley reclassified the species as Racosperma pubescens in 2003, when he proposed placing almost all Australian members of the genus into the new genus Racosperma.[8] However, this name is treated as a synonym of its original name.
Along with other bipinnate wattles, it is classified in the section Botrycephalae within the subgenus Phyllodineae in the genus Acacia. An analysis of genomic and chloroplast DNA along with morphological characters found that the section is polyphyletic, though the close relationships of it and many other species were unable to be resolved.[9]
Hybrids with Cootamundra wattle (Acacia baileyana) and West Wyalong wattle (A. cardiophylla) have been reported.[2]
Distribution and habitat
[edit]Endemic to New South Wales, Acacia pubescens is restricted to the Sydney Basin, where it is found in scattered populations from Bardwell Valley to Oakdale and Mountain Lagoon. Most plants are located around Bankstown, Fairfield and Rookwood in southwestern Sydney, and Pitt Town in the city's northwest.[10] Most of its habitat has vanished with the spread of housing in Sydney's suburbs,[5] and it is classified as "Vulnerable".[1] It is found on clay soils and associated plant communities—alluvial- and shale-based soils. It grows in open sclerophyll forest, associated with such species as grey box (Eucalyptus moluccana), broad-leaved ironbark (E. fibrosa), white feather honeymyrtle (Melaleuca decora), and blackthorn (Bursaria spinosa).[3]
Ecology
[edit]Acacia pubescens plants are thought to live up to 50 years in the wild.[3] They are able to resprout after bushfires from root suckers.[3]
References
[edit]- ^ Jump up to: a b NSW National Parks and Wildlife Service Sydney (February 2003). "2. Legislative Context". National recovery plan for the Downy Wattle (Acacia pubescens). Environment Australia. Retrieved 7 May 2012.
- ^ Jump up to: a b c P.G. Kodela. "New South Wales Flora Online: Acacia pubescens". Royal Botanic Gardens & Domain Trust, Sydney, Australia.
- ^ Jump up to: a b c d Benson, Doug; McDougall, Lyn (1996). "Ecology of Sydney Plant Species Part 4: Dicotyledon family Fabaceae". Cunninghamia. 4 (4): 552–752 [732]. ISSN 0727-9620.
- ^ "Mimosa pubescens Vent". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
- ^ Jump up to: a b "Acacia pubescens". Flora of Australia Online. Department of the Environment and Heritage, Australian Government.
- ^ Jump up to: a b "Acacia pubescens (Vent.) R.Br". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
- ^ Bentham, George (1864). "Acacia pycnantha". . Vol. 2: Leguminosae to Combretaceae. London, United Kingdom: L. Reeve & Co. p. 416.
- ^ Pedley, Les (2003). "A synopsis of Racosperma C.Mart. (Leguminosae: Mimosoideae)". Austrobaileya. 6 (3): 445–96.
- ^ Brown, Gillian K.; Ariati, Siti R.; Murphy, Daniel J.; Miller, Joseph T. H.; Ladiges, Pauline Y. (1991). "Bipinnate acacias (Acacia subg. Phyllodineae sect. Botrycephalae) of eastern Australia are polyphyletic based on DNA sequence data". Australian Systematic Botany. 19 (4): 315–26. doi:10.1071/SB05039.
- ^ Threatened Species Unit, Conservation Programs and Planning Division. "Threatened Species Information:Acacia pubescens" (PDF). NSW NPWS. Archived from the original (PDF) on 2008-08-05.