Stenocactus obvallatus
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Stenocactus obvallatus |
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| ( DC. ) A. Berger |
Stenocactus obvallatus is a species of plant in the genus Stenocactus from the cactus family(Cactaceae). The epithet of the species is derived from the Latin prefix “ob-” for ver and the verb “vallare” for to surround, surrounded by a wall and means something like covered by thorns .
description
The usually single, but sometimes two-stemmed, gray-green plant body is pressed spherical to spherical and reaches a diameter of 6 to 11 centimeters. Its 30 to 50 thin, wavy ribs are very broad at the areoles . There are 2 to 4 areoles on each rib. The 4 central spines , of which the upper one is flattened and wide, are reddish brown and up to 5 inches long and 3 to 4 millimeters wide. The 4 to 6 white radial spines are up to 1 centimeter long.
The pale yellow to white flowers appearing at the apex are quite large and have a reddish center. The petals are elongated, pointed.
Nothing is known about the appearance of the fruit .
Distribution, systematics and endangerment
Stenocactus obvallatus is distributed in Mexico in the state of México and in the capital district Distrito Federal .
The species was first described in 1828 by Augustin-Pyrame de Candolle as Echinocactus obvallatus . George Lawrence used the name Echinofossulocactus obvallatus in 1841 . Alwin Berger introduced the species in illustrated handbooks of succulent plants in 1929 : cacti in the genus Stenocactus .
Synonyms for the species are:
- Echinocactus pentacanthus Lem.
- Echinofossulocactus pentacanthus (Lem.) Britton & Rose
- Stenocactus pentacanthus (Lem.) A. Berger
- Cactus pentacanthus Kuntze
- Echinofossulocactus caespitosus Backeb.
In the Red List of Threatened Species of the IUCN , the species is called " Data Deficient (DD) ", i. H. with insufficient data.
proof
literature
- Echinofossulocactus obvallatus (De Candolle) Lawrence. In: NL Britton, JN Rose: The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family. Volume III. Washington 1922, p. 115.
- Echinofossulocactus obvallatus (DC.) Lawr. In: Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde. Volume V. 2nd edition. 1984, ISBN 3-437-30384-8 , pp. 2782f.
- Stenocactus obvallatus (AP de Candolle) A. Berger ex AW Hill In: Edward F. Anderson : The Cactus Family. Timber Press, Portland (Oregon) 2001, ISBN 0-88192-498-9 , pp. 639f.
- Echinofossulocactus obvallatus (DC.) Lawr. In: Walther Haage : Cacti from A to Z. 3rd edition. Quelle & Meyer, Heidelberg 1986, ISBN 3-494-01142-7 , p. 164.
Individual evidence
- ^ Mémoires du Museum d'Histoire Naturelle . Volume 17, Paris 1828, pp. 37-38 , plate 9 .
- ↑ George Lawrence: Catalouge of Cacti in the Collection of the Rev. Theodore Williams, at Hendon Vicarage, Middlesex . In: Gardener's Magazine and Register of Rural and Domestic Improvement . [Edited by J. Loudon] Volume 17, London 1841, pp. 313-319 online
- ↑ a b Illustrated manuals of succulent plants: cacti . P. 346, 1929
- ↑ Cactearum Aliquot Novarum ac Insuetarum in Horto Monvilliano ... p. 27, 1838
- ↑ The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . Washington 1922, Volume III, p. 115
- ↑ Revisio Generum Plantarum: vascularium omnium atque cellularium multarum secundum leges nomeclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... , Leipzig 1891. p. 261
- ^ Cactus and Succulent Journal of Great Britain . Volume 12, p. 81, ill., London 1950
- ↑ Stenocactus obvallatus in the IUCN Red List of Threatened Species 2013.2. Posted by: Gómez-Hinostrosa, C., Sánchez, E., Guadalupe Martínez, J. & Bárcenas Luna, R., 2009. Retrieved December 30, 2013.
