Carnet de voyage en Australie
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Carnet de voyage en Australie :
Darwin - Sydney en 40 jours et 10.000 km

Flore australienne rencontrée

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This page:
Australia travel and guide book: Darwin to Sydney in 40 days and 10,000 km
Seen plant:
name ( ), classification, description, links, location, remarks, pictures

Flore
Familles commençant par : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Plantes indéterminées

Xanthorrhoea (nom français indéterminé)
Aidez-moi à identifier ces espèces

  • Nom local : Blackboy or Yacca or Grass tree
  • Classification (Famille - Genre espèce) : Xanthorrhoeaceae - Xanthorrhoea ...
  • Description : Référence Woodgroup
    Xanthorrhoea is a genus of flowering plants native to Australia. There are 28 species and five subspecies of Xanthorrhoea. They are commonly known as Grass Trees or Yacca (in South Australia). All are perennials and many, but not all species develop an above ground stem. This is rough-surfaced, built from accumulated leaf-bases around the secondarily thickened trunk. The trunk is sometimes unbranched, some species will branch if the growing point is damaged and others naturally grow numerous branches.
    Flowers are borne on a long spike above a bare section called a scape, the total length can be up to four metres in some species. Flowering occurs in a distinct flowering period, which varies for each species. Flowering can be stimulated by bushfire, in which case it occurs in the next flowering period after the fire.
    It is commonly believed that the Xanthorrhoea grow at a rate of about 25 mm per century. They do grow very slowly, but this is a gross underestimate. After an initial establishment phase the average rate of growth varies for each species but can be as high as about 25 mm per year. Thus a five metre tall member of one of the fastest growing Xanthorrhoea would be about 200 years old. A slow one may be some 600 years old.
  • Liens internet :
    http://fr.wikipedia.org/wiki/Xanthorrhoea
    http://woodgroupsa.org.au/wSAknowledge/grasses.pdf ()
  • Lieu : 23ème jour - 24ème jour - Kelly Hill
  • Remarque : Endémique australienne, 7 espèces en Australie du Sud

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