Gunnera tinctoria

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Species

Gunnera tinctoria

Etymology

Gunnera: Named after Bishop Gunner, a Swedish botanist

Common Name(s)

Chilean rhubarb

Authority

Gunnera tinctoria (Molina) Mirbel

Family

Gunneraceae

Brief Description

Giant rhubarb-like herb, dying back to the large creeping stems over winter, with huge prickly leaves up to 2.5 m tall and large sausage-like flower spikes up to 1 m tall with tiny flowers and fruit covering the spike.

Flora Category

Vascular - Exotic

Distribution

Very scattered throughout New Zealand, but commonest in high rainfall areas, e.g. South Taranaki, Westland

Habitat

Margins of wetlands, damp cliffs and banks, often in light shade.

Features

Giant, clump-forming, gynomonoecious, summergreen herb, with short, stout, horizontal rhizomes. Winter resting buds massive, to about 25cm long. Lvs to about 2.5 m high, rhubarb-like, but rough to the touch. Petiole to 1m long, studded with conic, short, often reddish, prickles. Inflorescence spike-like and up to 1 m long, with very small flowers. small round orange fruit 1.5-2 mm long.

Similar Taxa

Very identifiable plant. Some specimens in cultivation have been called G. manicata, perhaps in error but perhaps to avoid the prohibition on growing G. tinctoria. These always have a much more lax flowering spike. But otherwise are very similar dimensions to G. manicata.

Flowering

October and November

Main Flower Colour

Red / Pink

Other Flower Colour

Green

Fruiting

Autumn

Year Naturalised

1968

Origin

Chile to Colombia in the Andes

References and further reading

Webb, C.J.; Sykes, W.R.; Garnock-Jones, P.J. (1988). Flora of New Zealand Volume 4: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch.

Popay et al (2010).  An illustrated guide to common weeds of New Zealand, third edition.  NZ Plant Protection Society Inc, 416pp.

Williams, PA; Ogle, CC, Timmins, SM; La Cock, G; Clarkson, J (2005). Chilean rhubarb (Gunnera tinctoria); biology, ecology and conservation impacts in New Zealand.
DOC Research & Development Series no.210. Dept of Conservation, Wellington.

 

 

 

This page last updated on 26 Jan 2016

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