Metrosideros excelsa | Excelsa | M. excelsa | Koompassia excelsa | Knightia | Doryanthes excelsa |
Bartlett's rātā grows to a height of up to thirty metres, usually beginning life as a hemi-epiphyte on taraire (Beilschmiedia tarairi), pūriri (Vitex lucens), rewarewa (Knightia excelsa) or tree ferns (Cyathea spp.).