Cyathea dealbata Image
Cyathea dealbata
Copyright © Phil Markey

Cyathea dealbata

Family: Cyatheaceae   

Nom commun: Silver Tree Fern

Nom commun:
Ponga

zone de rusticité: 9a     Voir les cartes des zones de rusticité pour le Royaume-Uni et les États-Unis

Informations générales:
As well as being one of the most distinctive of the New Zealand tree ferns it is also most easily recognised. The silvery-white undersides of its fronds serve to immediately identify it. Its trunk is up to 10 m tall and about 45 cm in diameter at the base. It is fibrous with matted aerial roots and the upper part is marked by the bases of the old frond bases. It has numerous fronds that usually spread more or less horizontally. The rather slender stipes are covered with a silvery-white, waxy bloom. Its fronds are 2-4 m long by 60 cm to 1.2 m wide with deep green upper surfaces and they are three-times pinnate. The old fronds soon fall to leave a clean trunk. On very young plants the undersurfaces of the fronds are usually green because they do not develop their distinctive silvery-white colour until they are several years old. An alternative name is ponga, which is also a generic vernacular name for tree ferns in general. The Maori name of ponga has become corrupted into ‘punga’ and, sometimes ‘bungie’.

Distribution:

Originaire de, New Zealand

The silver tree fern is common in lowland to montane forests throughout the North and South Islands to about as far as the Catlins area on the east. It also occurs on the Three Kings and Chatham Islands.

Localisation: New Zealand (-41.231750°N, 173.381119°E)

Observations
La carte peut ne pas représenter précisément la répartition naturelle. (Les marqueurs indiquent les données observées).
Cyathea dealbata Superposition d'image ©2019 Trebrown - Copie non autorisé sans autorisation préalable.


Ajoutez votre commentaire sur cette espèce.

Google

les droits d'auteur sont strictement respectés © 2019 fr.trebrown.com - Cyathea dealbata - Textes, photos et illustrations