Acanthocereus
Acanthocereus | ||||||||||||
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Acanthocereus subinermis |
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Scientific name | ||||||||||||
Acanthocereus | ||||||||||||
( Engelm. Ex A. Berger ) Britton & Rose |
Acanthocereus is a genus of plants fromthe cactus family (Cactaceae). The botanical name is derived from the Greek noun ἄκανθοζ ( ákanthos ) for thorn and refers to thecolumnar shapecovered with thorns .
description
The plants form more or less high bushes which later usually overhanging or spreading and are rarely tree-shaped. They usually have 3 (rarely 4 to 5) thin, rarely flattened and sometimes wavy ribs with mostly strong thorns .
The large, white, funnel-shaped flowers are 12 to 25 centimeters long, 6 to 12 centimeters in diameter and open at night. The sparsely scaled pericarpel and the long, stiff, upright flower tube are covered with a few thorns that soon decay and little wool.
The red or green, bare or thorny, tearing or non-tearing fruits are spherical to egg-shaped or pear-shaped and contain wide oval, shiny black seeds of up to 4.8 millimeters.
Systematics and distribution
The genus Acanthocereus is distributed in tropical America from Florida over the Caribbean , in Mexico and from southern Central America to Colombia .
In 1909 Nathaniel Lord Britton and Joseph Nelson Rose raised the subsection Cereus subsect described by Alwin Berger in 1905 . Acanthocereus Engelm. ex A.Berger to the rank of an independent genus. Berger later treated the genus as a subgenus Cereus subg. Acanthocereus Engelm. ex A. Berger (1929). The type species is Cereus baxaniensis Karw. ex whistle.
The genus Acanthocereus includes the following species :
- Acanthocereus baxaniensis (Karw. Ex Pfeiff.) Borg
- Acanthocereus colombianus Britton & Rose
- Acanthocereus horridus Britton & Rose
- Acanthocereus occidentalis Britton & Rose
- Acanthocereus subinermis Britton & Rose
- Acanthocereus tetragonus (L.) Hummelinck
A synonym of the genus is Monvillea Britton & Rose (1920).
proof
literature
- NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape III . The Carnegie Institution of Washington, Washington 1922, p. 44-45 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape IV . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30383-X , p. 1930-1940 .
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 68-70 .
- Walther Haage : cacti from A to Z . 3. Edition. Quelle & Meyer Verlag, Heidelberg 1986, ISBN 3-494-01142-7 , p. 10-11 .
Individual evidence
- ^ The Genus Cereus and its Allies in North America . In: Contributions from the United States National Herbarium . Volume 12, number 10, p. 432, 1909, (online) .
- ^ Edward F. Anderson : The great cactus lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 69-70 .
further reading
- Roberto Kiesling: Rehabilitation of the Genus Monvillea . In: Haseltonia . Volume 16, 2011, pp. 3–8, DOI: 10.2985 / 1070-0048-16.1.3 .