Halophytum ameghinoi
| Halophytum ameghinoi | ||||||||||||
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Halophytum ameghinoi |
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Halophytaceae | ||||||||||||
| A. Soriano | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Halophytum | ||||||||||||
| Speg. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Halophytum ameghinoi | ||||||||||||
| ( Speg. ) Speg. |
Ameghinoi Halophytum is the only one plant species of the single genus Halophytum the family of Halophytaceae . It belongs to the order of the carnation-like (Caryophyllales) within the flowering plants .
Occurrence
Halophytum ameghinoi is endemic to western and southwestern Argentina . This species thrives in semi-deserts in the temperate zone of Patagonia .
description
Vegetative characteristics
Halophytum ameghinoi is a succulent , annual herbaceous plant . The sieve tube plastids are of the P-type. The alternate leaves are simple and fleshy. Stipules are missing.
Generative characteristics
Halophytum ameghinoi are single sexed ( monoecious ). The female flowers sit individually in the four to five uppermost leaf axils. The male flowers are grouped in terminal, spiked inflorescences with bracts and bracts. The unisexual flowers are fourfold. In male flowers there are four free, membrane-like sepals and four centrifugal, fertile stamens . The anthers open with pores. The dry pollen grains are binucleate and have six apertures. In female flowers are missing bloom . The three carpels are an upper continuous, single-chamber (syncarp) ovary adherent to only one ovule . The stylus ends in three pits . There are no nectaries. Pollination takes place via wind ( anemophilia ); the anemophilia in Halophytum is an isolated phenomenon within the Caryophyllales, but probably an original feature.
From the four to five ovaries of the neighboring flowers, including the upper end of the stem axis, fleshy, berry-like collective fruits are formed.
The number of chromosomes is n = 12.
ingredients
The plant contains betalain .
Systematics
This species was first published by Carlos Luis Spegazzini in 1899 under the name Tetragonia ameghinoi and placed in the Aizoaceae family . Carlos Luis Spegazzini introduced her as Halophytum ameghinoi in 1902 to the Chenopodiaceae family .
Alberto Soriano published in 1946 in Halophytaceae, nueva familia de Centrospermae in Notas Mus. La Plata Bot. , 11, pp. 161-175 a description of the species and, as can be seen from the title, the new family, this should actually be the valid first publication according to the priority rule, but his article from 1984 Halophytaceae , in Bol. Soc. Argent. Bot. , 23, pp. 161–162 is considered to be a valid first publication of the family name.
Within the order of the Caryophyllales , the Halophytaceae are related to other betalain-containing families: Molluginaceae, Anacampserotaceae, Cactaceae, Portulacaceae, Basellaceae, Montiaceae, Talinaceae and Didieraceae.
swell
- The family of Halophytaceae in APWebsite. (Section systematics and description)
- Description of the family of the Halophytaceae in DELTA by L. Watson & MJ Dallwitz. (Section description)
- Raúl Pozner & Andrea Cocucci: Floral structure, anther development and pollen dispersal of Halophytum ameghinoi (Halophytaceae) , in International Journal of Plant Sciences , 167 (6), 2006: PDF-Online. (Section systematics and description)
Individual evidence
- ↑ Samuel F. Brockington, Roolse Alexandre, Jeremy Ramdial, Michael J. Moore, Sunny Crawley, Amit Dhingra, Khidir Hilu, Douglas E. Soltis & Pamela S. Soltis: Phylogeny of the Caryophyllales Sensu Lato: Revisiting Hypotheses on Pollination Biology and Perianth Differentiation in the Core Caryophyllales , in International Journal of Plant Sciences , 170 (5), 2009, pp. 627-643.
