Английская Википедия:Achnophora
Шаблон:Short description Шаблон:Speciesbox
Achnophora is a genus of flowering plants in the family Asteraceae described as a genus in 1883.[1][2]
The only known species is Achnophora tatei. This is a rare endemic found only on Kangaroo Island in South Australia.[3]
Description
Morphology
Roots
The rhizome of A. tatei is described as thick, hairless and vertical with bundles of short thick rootlets attached.[4][5]
Leaves
Achnophora tatei leaves are in a rosette form at the base of the plant, with a long narrow leaf shape (linear) and sheath at the base of the leaf.[5]
Flowers
Achnophora tatei flowers take the form of a scape (single flowering stem arising from the rhizome).[5] The flower stems are red, thread-like, almost naked and about as long as the leaves.[6] Flowers are one-headed, have a rosette of bracts (small leaf like structures) surrounding the flower (involucre) which are close to hemispheric (i.e. half of a sphere).[5]
The bracts of the flower are generally arranged in three rows of unequal length, with similar grades of size, and range in shape with the bract being egg-shaped with broader end at base (ovate) to the bract being egg-shaped with the narrow end at base (obovate).[5] The bracts are 4 to 5 millimetres long and have dry and membranous margins.[6]
The receptacle or floral axis has conspicuous oblong (having a length greater than width) scales between the flowers.[6]
The ray-flowers are female in 1 row, with about 25 ligules which are narrow, blue and are an estimated 10 millimetres long.[6]
Disc-flowers are tubular, with the style-branches being slender (capillary).[6]
Anthers (pollen bearing structure which is part of the stamen) are blunt and rounded (obtuse) at the base.[6]
Taxonomy
Etymology
Achnophora tatei is commonly known as the Kangaroo Island daisy.[7]
The genus name Achnophora is derived from the Greek word 'achne' which means chaff and 'phoros' meaning bearing.[7] This refers to the clearly visible scales of the receptacle and pappus.[7] Tatei is named after Ralph Tate (1840-1901), a British born botanist and geologist, who was a professor of Natural Science at the University of Adelaide.[7]
Distribution and habitat
Achnophora tatei is found along the south coast of Kangaroo Island, South Australia.[6] The species is found in wet, swampy places.[6]
Conservation
Achnophora tatei has been classified as a vulnerable species by the South Australian Government due to a restricted distribution and the impacts of increasing salinity.[7]
References
- ↑ Mueller, Ferdinand Jacob Heinrich von. 1883. Transactions and Proceedings of the Royal Society of South Australia 6:32
- ↑ Tropicos, Achnophora F. Muell.
- ↑ The Plant List Achnophora tatei F.Muell.
- ↑ Шаблон:Cite journal
- ↑ 5,0 5,1 5,2 5,3 5,4 Шаблон:Cite book
- ↑ 6,0 6,1 6,2 6,3 6,4 6,5 6,6 6,7 Шаблон:Cite book
- ↑ 7,0 7,1 7,2 7,3 7,4 Шаблон:Cite web
- Английская Википедия
- Monotypic Asteraceae genera
- Flora of Kangaroo Island
- Endemic flora of Australia
- Plants described in 1883
- Taxa named by Ferdinand von Mueller
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