Montevideo arrowhead
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Montevideo arrowhead ( Sagittaria montevidensis ) |
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| Sagittaria montevidensis | ||||||||||||
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The Montevideo arrowhead ( Sagittaria montevidensis ), also Argentinian Pfeilkraut called, is a plant from the family of alismataceae (Alismataceae).
description
The Montevideo arrowhead is a vigorous marsh plant , the youthful leaves of which grow submerged and band-shaped. The leaves of older plants, on the other hand, are above the surface of the water. They have thick and fleshy petioles that are up to 3 inches thick. The medium green leaves are up to 28 centimeters long and 23 centimeters wide.
This type of plant is single-sexed ( monoecious ). The flowers are two to three centimeters in diameter. The inflorescence consists of three green sepals , three white petals and has a striking wine-red spot in the middle.
The number of chromosomes is 2n = 22.
ecology
For a tropical plant, the Montevideo arrow herb can tolerate unusual temperature fluctuations. It is able to withstand temperatures close to 0 degrees Celsius for a short time as well as temperatures of up to 35 degrees Celsius.
Distribution area and habitat
The plant originates from the tropics and subtropics of South America. It grows there preferentially on the edges of standing and often only temporarily existing waters.
Systematics
In addition to the nominate form , the following subspecies , varieties and forms are also described:
- Sagittaria montevidensis subsp. calycina (Engelm.) Bogin : It occurs from the United States to northern Mexico.
- Sagittaria montevidensis Cham. & Schltdl. subsp. montevidensis (Syn .: Sagittaria montevidensis subsp. chilensis (Cham. & Schltdl.) Bogin , Sagittaria montevidensis f. immaculata Hicken , Sagittaria montevidensis var. scabra Micheli , Sagittaria montevidensis f. flaviflora Chodat & Hassl. , Sagittaria montevidensis f. maculata Hicken ) : It occurs from Ecuador to southern South America.
- Sagittaria montevidensis subsp. cancellous (Engelm.) Bogin (Syn .: Sagittaria montevidensis var. spongiosa (Engelm) B.Boivin. ): It comes from New Brunswick to Maryland before.
use
In contrast to other species from the genus of the arrow herbs such as the flooding arrow herb or the broad-leaved arrow herb, the Montevideo arrow herb is not suitable for planting in aquariums . However, it is occasionally used in paludariums . The plant is also often seen in botanical gardens .
literature
- Bernd Greger: Plants in the freshwater aquarium. Birgit Schmettkamp Verlag, Bornheim 1998, ISBN 3-928819-16-X
- Christel Kasselmann : aquarium plants. Ulmer Verlag, Stuttgart, 2nd edition 1999, ISBN 3-8001-7454-5 , pp. 411-413.
Individual evidence
- ^ Tropicos. [1]
- ↑ a b c d Rafaël Govaerts (Ed.): Sagittaria montevidensis - data sheet at World Checklist of Selected Plant Families of the Board of Trustees of the Royal Botanic Gardens, Kew. Last accessed on August 19, 2016.
- ↑ subsp. at gbif ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (English, accessed November 4, 2009)
