Huidobria
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| Scientific name | ||||||||||||
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Huidobria is a genus of plants withinthe nettle family (Loasaceae). It contains only two species that are found in Chile.
description
Vegetative characteristics
One Huidobria species is an upright, highly branched shrub and the other is an annual herbaceous plant . They form strong, fleshy tap roots. Nettle hairs are always present on the above-ground parts of the plant.
The lower leaves are opposite, the upper alternate. The simple leaf blades are egg-shaped to kidney-shaped with a slightly lobed and furrowed leaf margin.
Generative characteristics
The inflorescences are composed of asymmetrical and complex dichasias . The upright flowers seem to be irregularly opposite to the foliage leaves, which, however, represent frondose bracts .
The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The five boat-shaped petals are white to cream-colored. There are five staminode groups . The five to seven outer staminodes are fused and form a white scale leaf ( nectar scale ), on the outer side of which there are five to seven thread-like, pure white appendages. There are three to five internal staminodes. 10 to 15 stamens are in five bundles. The ovary is subordinate. The numerous ovules are located on placentas that are deeply divided into three lamellae .
The almost spherical capsule fruits open with four or five flaps at the top of the fruit and contain numerous seeds. The seed coat (testa) is grooved or reticulated.
The number of chromosomes is 2n = 36.
Occurrence
Both Huidobria species are endemic to Chilean deserts, including the Atacama Desert .
Systematics
The genus Huidobria was set up in 1847 by Claude Gay in Flora Chilena , Volume 2, 4, Pages 438-441, Plate 26. The type species is Huidobria chilensis Gay . Ignatz Urban and Ernst Friedrich Gilg downgraded the genus in 1900 to a section of the Loasa genus . As part of extensive systematic work on the family by Maximilian Weigend , following a proposal by Hans Rudolf Jürke Grau, it was re-established as an independent genre. A synonym for Huidobria Gay is Loasa sect. Huidobria (Gay) Urb. & Gilg .
The genus Huidobria belongs to the tribe Loaseae in the subfamily Loasoideae within the family of Loasaceae . The closest related genus is Presliophytum , which occurs in Peru.
There are only two species in the Huidobria genus :
- Huidobria chilensis Gay (Syn .: Loasa chilensis (Gay) Urb. & Gilg )
- Huidobria fruticosa Phil. (Syn .: Loasa fruticosa (Phil.) Urb. & Gilg )
proof
literature
- Maximilian Weigend: Loasaceae. In: Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants . Volume 6: Flowering Plants, Dicotyledons: Celastrales, Oxalidales, Rosales, Cornales, Ericales . Springer, Berlin / Heidelberg / New York 2004, ISBN 3-540-06512-1 , pp. 248 (English, limited preview in Google Book search).
Individual evidence
Most of the information in this article has been taken from the sources given under references; the following sources are also cited:
- ↑ a b c d e f g h i j k l m n o Maximilian Weigend: Familial and generic classification , online at the FU Berlin. , last accessed on September 27, 2017
- ^ Huidobria at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved September 27, 2017.
- ↑ Huidobria in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved September 27, 2017.