Silver sword
| Silver sword | ||||||||||||
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Haleakalā silver sword ( Argyroxiphium sandwicense ssp. Macrocephalum ) |
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| Scientific name | ||||||||||||
| Argyroxiphium sandwicense | ||||||||||||
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The silver sword ( Argyroxiphium sandwicense ) (English Silversword) belongs to the Asteraceae family. This species occurs only on Pu'u Kukui , the highest mountain in western Maui, and on Haleakalā crater at altitudes between 2100 and 3100 meters.
The silver sword is threatened with extinction.
description
Argyroxiphium sandwicense is a perennial herbaceous plant . The sword-shaped leaves are silvery hairy. The species grows as a rosette plant for many years .
After 5 to 20 years of growth, the silver sword produces an inflorescence from 1 to 1.5 meters in height with 100 to 500 individual flowers. After its seeds have been scattered, the plant dies because each silver sword only flowers once. This species blooms between May and October.
Subspecies
- Haleakalā silver sword ( Argyroxiphium sandwicense subsp. Macrocephalum (A.Gray) Meyrat., Syn .: Argyroxiphium macrocephalum A.Gray (Basionym), Argyroxiphium sandwicense var. Macrocephalum (A.Gray) Hillebr.)
- Argyroxiphium sandwicense DC. subsp. sandwicense
swell
- Wayne P. Armstrong: The Silver Sword Alliance. A Group Of Hawaiian Plants That Evolved From An Ancestral California Tarweed. In: Wayne's Word. Retrieved July 12, 2020 .
further reading
- PJ Melcher, G. Goldstein, FC Meinzer, B. Minyard, TW Giambelluca & LL Loope: Determinants of thermal balance in the Hawaiian giant rosette plant, Argyroxiphium sandwicense. In: Oecologia , Volume 98, No. 3-4, Springer Berlin, Heidelberg, 1994, Abstract: doi: 10.1007 / BF00324231
Web links
- Entry at GRIN.
- Argyroxiphium sandwicense inthe IUCN 2013 Red List of Threatened Species . Posted by: Bruegmann, MM & Caraway, V, 2003. Retrieved September 29, 2013.