Английская Википедия:Allocasuarina acutivalvis
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Allocasuarina acutivalvis is a species of flowering plant in the family Casuarinaceae and is endemic to the southwest of Western Australia. It is a dioecious shrub to small tree that has erect branchlets, the leaves reduced to scales in whorls of 10 to 14, the fruiting cones Шаблон:Cvt long containing winged seeds (samaras) Шаблон:Cvt long.
Description
Allocasuarina acutivalvis is a dioecious shrub to small tree that typically grows to a height of Шаблон:Cvt. The branchlets are erect, up to Шаблон:Cvt long, the leaves reduced to erect, scale-like teeth Шаблон:Cvt long, arranged in whorls of 10 to 14 around the branchlets. The sections of branchlet between the leaf whorls (the "articles") are Шаблон:Cvt long and Шаблон:Cvt wide. The flowers on male trees are arranged in spikes resembling a string of beads Шаблон:Cvt long, the anthers Шаблон:Cvt long. The female cones are covered with fine, white hairs when young, and are sessile or on a peduncle up to Шаблон:Cvt long. Mature cones are Шаблон:Cvt long and Шаблон:Cvt in diameter, the samaras black or dark brown and Шаблон:Cvt long.[1][2]
Taxonomy
This species was first formally described in 1876 by the botanist Ferdinand von Mueller who gave it the name Casuarina acutivalvis in his Fragmenta Phytographiae Australiae.[3][4] It was reclassified in 1982 into the genus Allocasuarina as A. acutivalvis by Lawrie Johnson in the Journal of the Adelaide Botanic Gardens.[5][6] The specific epithet, (acutivalvis) means "sharply pointed lobes".[7]
In the same journal, Johnson described two subspecies of A. acutivalvis, and the names are accepted by the Australian Plant Census:
- Allocasuarina acutivalvis (F.Muell.) L.A.S.Johnson subsp. acutivalvis[8] has articles Шаблон:Cvt long with 10 to 14 teeth Шаблон:Cvt long, the cone body Шаблон:Cvt long and Шаблон:Cvt wide.[9][10]
- Allocasuarina acutivalvis subsp. prinsepiana (C.R.P.Andrews) L.A.S.Johnson (previously known as Casuarina prinsepiana)[11] has articles Шаблон:Cvt long with 11 to 13 teeth Шаблон:Cvt long, the cone body Шаблон:Cvt long and Шаблон:Cvt wide.[12][13]
Distribution and habitat
Allocasuarina acutivalvis grows in tall heath and open woodland, sometimes on rocky hillsides, and is widespread in the south-west of Western Australia from north of the Murchison River to Zanthus.[1][9][10] Subspecies prinsepiana occurs from near Mullewa to near Merredin, surrounded by and sometimes intergrading with subsp. acutivalvis.[12][13]
Conservation status
Both subspecies of A. acutivalvis are listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.[10][13]
References
- Английская Википедия
- Страницы с неработающими файловыми ссылками
- Allocasuarina
- Rosids of Western Australia
- Fagales of Australia
- Plants described in 1876
- Taxa named by Ferdinand von Mueller
- Dioecious plants
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
