Angophora costata subsp. euryphylla is a species of medium-sized to large tree that is endemic to a restricted area of New South Wales. It has smooth bark, lance-shaped adult leaves, flower buds in groups of three, white or creamy white flowers and cylindrical to barrel-shaped fruit. It is similar to subspecies costata but has broader leaves and larger fruit.
Angophora costata subsp. euryphylla is a tree that typically grows to a height of and forms a lignotuber. It has smooth pinkish to orange bark that weathers to grey. Young plants and coppice regrowth have sessile leaves with a stem-clasping base that are egg-shaped, long, wide and arranged in opposite pairs. Adult leaves are also arranged in opposite pairs, glossy green above and paler below, lance-shaped or curved, long and wide on a petiole long. The flower buds are arranged on the ends of branches on a branched peduncle long, each branch of the peduncle usually with three buds on pedicels long. Mature buds are globe-shaped, long and wide, the floral cup hairy with longitudinal ribs. The sepals are up to long. The petals are white with a green keel and long, wide. Flowering has been observed in November. The fruit is a cylindrical to barrel-shaped capsule long and wide on a pedicel long.[1] [2] [3] [4]
Metrosideros costata was first formally described in 1788 by Joseph Gaertner. In 1916 James Britten changed the name to Angophora costata and in 1986 Gregory John Leach described three subspecies, including subspecies euryphylla. The type specimens were collected near Putty in 1971.[5] [6] [7] The epithet (euryphylla) is from ancient Greek words meaning "broad" and "leaf".
This eucalypt subspecies is restricted to rocky sandstone outcrops in open forest near Putty, in the Howes Valley and Judge Dowling Range.