Alsophila tricolor (Colenso) R.M.Tryon

국표에 없다.

Alsophila tricolor, synonym Cyathea dealbata, commonly known as the silver fern or silver tree-fern, or as ponga /ˈpɒŋə/ or punga /ˈpʌŋə/ (from Māori kaponga or ponga), is a species of medium-sized tree fern, endemic to New Zealand. The fern is usually recognisable by the silver-white colour of the under-surface of mature fronds. It is a symbol commonly associated with the country both overseas and by New Zealanders themselves.

Alsophila tricolor is the correct name for Cyathea dealbata in Alsophila because the epithet dealbata is preoccupied by Alsophila dealbata C.Presl (now a synonym of Sphaeropteris glauca).

Description

This fern is known to grow to heights of 10 metres (33 ft) or more (though it occasionally takes a rare creeping form). The crown is dense, and mature fronds tend to be about 4 metres (13 ft) long and have a silver-white colouration on the undersides. This distinctive silver colouration has made them useful for laying along tracks for night walking. The scales are a dark brown and are often twisted and glossy. Rhizomes very rarely prostrate, usually erect, forming a woody trunk up to 12 metres (39 ft) tall, 160 to 450 millimetres (6.3 to 17.7 in) in diameter, covered in light brown or white projecting stipe bases, bearing scales near the apex.

 

Silver fern - Wikipedia

https://youtu.be/ImIXh-ecwZk?t=336