Walter Oliver

Aristotelia serrata, commonly known as wineberry and makomako, is a species of small tree in the family Elaeocarpaceae. It is a fast-growing dioecious tree which can be semideciduous. It is endemic to New Zealand. Its range mainly covers the North, South, and Stewart Islands. A. serrata is typically found in lowland to montane environments, and the plant can freely colonise disturbed areas. The tree can reach up to 10 metres (30 feet) tall, with a trunk diameter of up to 30 cm (12 in). The bark is grey or pale brown, smooth, and patterned with flat lenticels. Aristotelia serrata was first

Xeronema callistemon is a species of flowering plant endemic to the Poor Knights Islands and Taranga Island in the north of New Zealand. It was discovered in 1924 and has a common name Poor Knights lily. The plant is listed as vulnerable in the 1997 IUCN Red List of Plants, but As of April 2026 is not listed in the IUCN Red List of Threatened Species.

Metrosideros kermadecensis, commonly known as the Kermadec pōhutukawa, is a species of tree in the family Myrtaceae. It is endemic to the Kermadec Islands of New Zealand. It reaches a height of up to 20 metres (70 feet), with its main trunk reaching 3 m (10 ft) in diameter. The species is classified in the subgenus Metrosideros. M. kermadecensis was first described by the British botanist Joseph Dalton Hooker in 1864, and was described as Metrosideros polymorpha. It was given its current binomial name in 1928 by the New Zealand botanist Walter Oliver. Metrosideros kermadecensis has been

Aciphylla aurea, known as taramea in Māori and golden speargrass or golden Spaniard in New Zealand English, is a large, spiky, tufted plant with sharp yellowish-green leaves in the speargrass genus Aciphylla. A. aurea is found throughout the South Island of New Zealand in montane to low alpine habitats.

Coprosma cheesemanii is a species of Coprosma from New Zealand. It is a low shrub with green flowers and small leaves.

Aciphylla subflabellata is one of the 40 species of the genus Aciphylla, all found only in New Zealand and Australia.

Veronica breviracemosa, synonym Hebe breviracemosa, is a plant in the hebe group of the family Plantaginaceae native to Raoul Island of New Zealand's Kermadec Islands, where it is found in coastal cliffs and headlands.

Tecomanthe speciosa (also known as the Three Kings vine or akapukaea) is a species of subtropical forest lianes. A single specimen was first discovered on Manawatāwhi / Three Kings Islands, 55 km (34 mi) off the northern tip of New Zealand, during a scientific survey in 1945. No other specimens have been recorded in the wild. Tecomanthe is a tropical genus otherwise unrepresented in New Zealand. Four other species of Tecomanthe occur in Queensland, Indonesia, New Guinea, and the Solomon Islands.

Metrosideros carminea (Carmine rātā, Crimson rātā or in Māori akakura) is a forest liane or vine that is endemic to New Zealand. It occurs in coastal and lowland forest from Te Paki in the north of the North Island south to Māhia Peninsula and Taranaki. It is one of a number of New Zealand Metrosideros species which live out their lives as vines, unlike the northern rātā (M.robusta), which generally begins as a hemi-epiphyte and grows into a huge tree.

Dracophyllum patens, commonly called Great Barrier Inaka, is a species of plant in the family Ericaceae that is endemic to New Zealand.

Dracophyllum fiordense, commonly known as the Fiordland grass tree, is a species of tree or shrub in the heath family, Ericaceae. It is endemic to the South Island of New Zealand. It reaches a height of 1.5–5.0 metres (5–16 feet) and has tufts of long green leaves at the ends of its branches. Each leaf has a distinctive curled spiral tip. D. fiordense has a pyramid-shaped inflorescence (flower spike) hidden under each clump of leaves, with between 113 and 120 pink flowers on each spike, and later reddish-brown dry fruit; both are around just 2 by 2 mm. It inhabits shrubland, lowland and

Dracophyllum densum is a species of shrub endemic to north-west Nelson in New Zealand's South Island. It was first described by Walter Oliver in 1952 and gets the specific epithet densum for its leaves growing densely. In the heath family Ericaceae, it inhabits mountain summits, plateaux, and ridge lines and reaches a height of 0.3–0.5 m (1–2 ft). A 2017 assessment using the New Zealand Threat Classification System classified it as "Declining", giving it an estimated population of more than 100,000.

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Coprosma prisca, commonly known as goatwood, is a flowering plant in the family Rubiaceae. The Latin specific epithet prisca means “old” or “ancient”, though its application to this species is unknown.

Coprosma ochracea, the Maui mirrorplant, is a shrub that is native to Hawaii. A member of the coffee family, it bears bright red or orange berries. The Hawaiian thrush eats its fruits and spread the seeds. Some people use the berries as laxative.

Coprosma dodonaeifolia is a species of plant in the family Rubiaceae native to north New Zealand. The species has a chromosome number of 44. It is also closely related to Coprosma lucida.

Aciphylla glaucescens is a species of Aciphylla endemic to New Zealand.

Dracophyllum trimorphum, commonly known as inaka and dracophyllum, is a species of shrub or small tree endemic to north-west Nelson in New Zealand's South Island. It was first described by Walter Oliver in 1952 and gets the specific epithet trimorphum for its three phases of growth. In the heath family Ericaceae, it inhabits cliffs and steep slopes near the coast and reaches a height of 0.2–3.0 m (1–10 ft). A 2017 assessment using the New Zealand Threat Classification System classified it as "Naturally Uncommon", giving it an estimated habitat area of less than 10 km2 (1,000.0 ha).

Dracophyllum pronum, commonly known as trailing neinei, is a species of sprawling shrub endemic to the South Island of New Zealand. It was first described by Walter Oliver in 1928 and gets the specific epithet pronum for its prostrate growth habit. In the heath family Ericaceae, it inhabits montane and subalpine areas and reaches a height of 1–25 cm (0.4–9.8 in).

Coriaria pottsiana is a species of shrub in the family Coriariaceae. It is endemic to New Zealand's North Island. This species is found on shingle slips. It was first described by the New Zealand botanist Walter Oliver in 1942. C. pottsiana's range only covers Mount Hikurangi and Mount Parikanapa in the Raukūmara Range. This species, and all Coriaria species, are poisonous, especially the seeds. C. pottsiana's 2023 assessment in the New Zealand Threat Classification System was "Threatened – Nationally Critical".

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Aciphylla takahea is a species of Aciphylla native to New Zealand.

Aciphylla horrida is a species of Aciphylla, commonly known as giant speargrass, native to New Zealand.

Aciphylla ferox, also called fierce speargrass or taramea, is a species of Aciphylla endemic to the South Island of New Zealand.

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