Kingdom:   Plantae
(Unranked):        Angiosperms
(Unranked):        Eudicots
(Unranked):        Asterids
Order:   Asterales
Family:        Asteraceae
Tribe:        Senecioneae
Genus:    Ligularia
Species: L. japonicum
Cultivar name: Ligularia japonicum 'Giganteum'
Synonyms: Ligularia reniformis Ligularia tussilaginea, Farfugium japonicum var. giganteum, Farfugiun reniforme
Common name: Tractor seat ligularia (NZ only) 

Skull and crossbones1.jpg  All parts of it are poisonous if ingested.

Ligularia japonicum 'Giganteum' is an evergreen foliage plant which has large, rounded, glossy, leathery leaves and daisy-like yellow flowers that originates from subtropical East Asia. It grows to a 1+m by 1m clump. Reproduction is by division or seed.
The common name is only used in New Zealand and it is named that because it looks like and is the same size as the metal seats on vintage tractors.

Ligularia japonicum Giganteum .JPG

Ligularia japonicum Giganteum tractor seat ligularia.JPG

Ligularia japonicum Giganteum Tractor seat ligularia -001.JPG

Ligularia japonicum Giganteum -002.JPG

Ligularia japonicum Giganteum Tractor seat ligularia -002.JPG 

Ligularia japonicum Giganteum Tractor seat ligularia .JPG

Ligularia japonicum -004.JPG

Ligularia japonicum Giganteum -001.JPG

Mature flowers.
Ligularia japonicum Giganteum -003.JPG 

The seed heads.
Ligularia japonicum -003.JPG 

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/