Blood aparon rigidum
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| Blood aparon rigidum | ||||||||||||
| ( BLRob. & Greenm. ) Mears |
Blutaparon rigidum is an extinct plant species from the foxtail family. It was endemic to the Galápagos Islands .
features
Blutaparon rigidum was a small shrub with profuse and dense branching. The internodes were 5 to 12 mm long and smooth. The 3 to 4 mm long and 1 mm wide leaves were awl-shaped and prickly. They had a broad base and completely enveloped the stem. The leaf axils were covered with woolly hair. The inflorescence was elongated and consisted of terminal spikes that reached a length of 6 to 17 mm and width of 5 to 6.5 mm. The bract, the cover sheet and the flower envelope were white. The bracts were ovate-heart-shaped and about 2 mm long. The prophylls were ovate-lanceolate, keeled and 2.5 to 2.7 mm long. The apex was often curved towards the axis of the inflorescence. The 2.6 to 3 mm long segments of the perianth were oblong-ovoid and blunt. The two lateral and inner segments were bluntly keeled. The stamens were about 2.3 mm, the anthers 0.8 mm and the pistil about 1.7 mm long. There were two 0.3 mm long scars that were oblong-triangular in shape.
status
Blutaparon rigidum has only become known through two collections from the Galápagos island of San Salvador . The art was first collected in 1891 by Georg Hermann Carl Ludwig Baur and the second time in 1905/1906 by Albert Newton Stewart . Since then, the plant has been considered extinct, which was confirmed by a search in 2000. Overgrazing by goats and donkeys is suspected as a possible cause of extinction.
literature
- Ira L. Wiggins, Duncan M. Porter: Flora of the Galápagos Islands. Stanford University Press, Stanford CA 1971, ISBN 0-8047-0732-4 .
Web links
- Blutaparon rigidum in the Red List of Threatened Species of the IUCN 2007. Posted by: A. Tye, 2000. Retrieved on 4 September, 2008.