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Description ( englanti )

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Perennial herb, frequently woody and suffruticose or growing in erect clumps, 0.3-1.5 m, branched from about the base with simple stems or the stems with long, ascending, sometimes intricate branches. Stem and branches terete, striate, ± densely whitish- or yellowish-tomentose or pannose, when dense the indumentum often appearing tufted. Leaves alternate, very variable in size and form, from narrowly linear to suborbicular, ±densely whitish- or yellowish tomentose but usually more thinly so and greener on the upper surface, margins plane or more or less involute (when strongly so the leaves frequently ± falcate-recurved), sessile or with a short and indistinct petiole or the latter rarely to c. 2 cm in robust plants. Flowers dioecious. Spikes sessile, cylindrical, dense and stout (up to c. 10 x 1 cm.), to slender and interrupted with lateral globose clusters of flowers and with some spikes apparently pedunculate by branch reduction; male plants always with more slender spikes (but plants with slender spikes may not be male) ; upper part of stem and branches leafless, the upper spikes thus forming terminal panicles; bracts 0.75-2.25 mm, broadly deltoid-ovate, hyaline, acute or obtuse with the obscure midrib ceasing below the apex, densely lanate throughout or only about the base or apex, persistent; bracteoles similar, also persistent. Female flowers with outer 2 tepals 2-3 mm, oblong-obovate to obovate-spathulate, lanate, acute to obtuse or apiculate at the tip, the yellowish midrib ceasing well below the apex; inner 3 slightly shorter, elliptic-oblong, ± densely lanate, acute, with a narrow green vitta along the midrib, which extends for about two-thirds the length of each tepal; style slender, distinct, with the two filiform, flexuose stigmas at least equalling it in length; filaments reduced, anthers absent. Male flowers smaller, the outer tepals 1.5-2.25 mm, ovate; filaments delicate, the anthers about equalling the perianth; ovary small, style very short, stigma rudimentary. Capsule 1-1. 5 mm, rotund, compressed. Seed 0.9-1.25 mm, round, slightly compressed, brown or black, shining and smooth or very faintly reticulate.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliografinen lainaus
Flora of Pakistan Vol. 0: 26 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of Pakistan @ eFloras.org
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S. I. Ali & M. Qaiser
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eFloras

Aerva javanica ( englanti )

tarjonnut wikipedia EN

Aerva javanica, the kapok bush or desert cotton, is a species of plant in the family Amaranthaceae. It has a native distribution incorporating much of Africa (including Madagascar), and the south-west and south of Asia, and it has become adventitious in northern Australia.[2][3]

Description

Aerva javanica (Burm.f.) Schult. in the Pilbara, Western Australia

The plant is herbaceous, multi-stemmed and soft-wooded and bears broad leaves; it often has an erect habit and grows to a height of about 1.6 metres (5 ft 3 in). In Western Australia it tends to grow in sandy soils especially along drainage lines. It flowers between January and October.[4] Diplospory, a type of Agamospermy, occurs during the development of female gametophyte in the ovule and hence reduction division does not take place in the Megaspore mother cell. The diploid egg is unfertilized and forms the embryo. Hence daughter plants are exactly clones of the mother.

The species uses C4 carbon fixation.[5] It is dioecious, meaning male and female flowers are produced on separate individuals.[6]

Uses

This herb is deep rooted, and is used as soil binder in desert reclamation.[7] It is used for fuel and for fodder for goats. In traditional medicine the seeds are believed to cure headaches. A gargle is made from the plant to try to treat toothache.[8]

The plant has naturalised in northern regions of Australia, as an alien introduction, and is cultivated and utilised by the indigenous peoples. The thick, white inflorescences have traditionally been harvested in Arabia for stuffing cushions and saddle pads.[9][10] Today, the soft fibres are still used as kapok for pillows. It is called Bilhangga in the languages of the Yindjibarndi and Ngarluma people, the English term is Kapok Bush.[11]

References

  1. ^ Aerva javanica at Tropicos
  2. ^ "Aerva javanica". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 10 January 2018.
  3. ^ "Aerva javanica (Burm.f.) Schult. Kapok Bush". FloraBase. Western Australian Herbarium. 14 August 2007. Retrieved 27 January 2017.
  4. ^ "Aerva javanica (Burm.f.) Schult". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  5. ^ Sage, R.F.; Sage, T.L.; Pearcy, R.W.; Borsch, T. (2007). "The taxonomic distribution of C4 photosynthesis in Amaranthaceae sensu stricto". American Journal of Botany. 94 (12): 1992–2003. doi:10.3732/ajb.94.12.1992. ISSN 0002-9122. PMID 21636394. open access
  6. ^ Chabane, D.; Mouhoub, F. (2017). "Establishment of vitroplants from female flowers of Aerva javanica (Burm. F) Juss ex Schult". Acta Horticulturae (1155): 607–612. doi:10.17660/ActaHortic.2017.1155.88.
  7. ^ L R Burdak (1982): Recent advances in desert afforestation, Dehradun, p. 66
  8. ^ Muhammad Qasim Samejo; Shahabuddin Memon; Muhammad Iqbal Bhanger; Khalid Mohammed Khan (2011). "Chemical Compositions of the Essential oil of Aerva javanica Leaves and Stems". Pak. J. Anal. Environ. Chem. 13 (1): 48–52. ISSN 1996-918X.
  9. ^ M.A. Zahran & A.J. Willis, The Vegetation of Egypt, Hong Kong 1992, pp. 187-188 ISBN 978-0-412-31510-7
  10. ^ James P. Mandaville, Bedouin Ethnobotany - Plant Concepts and Uses in a Desert Pastoral World, University of Arizona Press 2011, p. 154, (ISBN 978-0-8165-2900-1)
  11. ^ Burndud (1990). Wanggalili; Yinjibarndi and Ngarluma Plants. Juluwarlu Aboriginal Corporation. p. 17.

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Aerva javanica: Brief Summary ( englanti )

tarjonnut wikipedia EN

Aerva javanica, the kapok bush or desert cotton, is a species of plant in the family Amaranthaceae. It has a native distribution incorporating much of Africa (including Madagascar), and the south-west and south of Asia, and it has become adventitious in northern Australia.

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cc-by-sa-3.0
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Wikipedia authors and editors
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wikipedia EN