Peter de Lange

Ficinia spiralis (pīngao, pīkao, or golden sand sedge) is a coastal sedge endemic to New Zealand (including the Chatham Islands). Originally widespread, it has suffered severely from competition with introduced marram grass and animal grazing and now has only a patchy distribution.

Veronica jovellanoides, commonly known as Riverhead speedwell, is a threatened flowering plant in the family Plantaginaceae. It is endemic to New Zealand, where only three plants are known in the wild. All are found within the Ernest Morgan Reserve, a 20 ha forest northwest of Auckland. Its discovery is accredited to a retired plant nursery owner, Geoff Davidson, who organised the land's protection a few decades prior, and found it by chance on a walk in November 2007. V. jovellanoides has a prostrate growth habit, forming large 2 to 3 m (6.6 to 9.8 ft) mats on the ground, and long stems with

Cyperus insularis is a species of sedge that is native to the north island of New Zealand.

Clivia robusta is a plant and geophyte belonging to the genus Clivia. The species occurs in KwaZulu-Natal and the Eastern Cape from Pondoland and Port St. Johns to the Umzimkulu River north of the Oribira Canyon and has an area of occurrence of 3,100 km2. There are currently less than ten subpopulations and the species has lost 30% of its habitat in the last 90 years due to overuse by traditional healers.

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Sporadanthus ferrugineus, the bamboo rush or giant wire rush, is a restiad plant endemic to the northern North Island of New Zealand.

Sophora godleyi, also known as Godley's kōwhai, papa kōwhai or Rangitikei kōwhai, grows naturally in the west of the North Island of New Zealand from Te Kūiti to Manawatū. It is one of eight recognised species of kōwhai and was described as a separate species in 2001, having formerly been considered to be part of species small-leaved kōwhai. It is named after Dr. Eric Godley, former head of the Department of Scientific and Industrial Research (DSIR) Botany Division.

Parsonsia praeruptis is a non-twining, non-climbing Parsonsia, endemic to New Zealand and is a member of the dogbane family Apocynaceae. It is found only in the shrubland of the Surville Cliffs, North Cape Peninsula, where it scrambles through "openly branched, prostrate windswept shrub(s)". Possums attack buds, flowers and fruits of this species and where baiting for possums is not possible this plant is in decline because of possum browsing pressure.

Dianella latissima, commonly known as blueberry and ink berry, is a species of flowering plant in the family Asphodelaceae. It is endemic to New Zealand; its range mainly covers the northern North Island. It grows in coastal to montane environments. The species was first described in 2007 by Peter de Lange and Peter Brian Heenan. A perennial herb, the species has long leaves and exposed inflorescences (flower clusters). The conservation status of D. latissima was assessed by the New Zealand Threat Classification System in 2023 as "Not Threatened".

Dianella haematica, commonly known as swamp blueberry, swamp dianella, and swamp ink berry, is a species of flowering plant in the family Asphodelaceae. It is endemic to New Zealand; its range mainly covers the northern North Island. It grows in coastal to lowland wetland environments. The species was first described in 2007 by Peter de Lange and Peter Brian Heenan. A pernnial herb, the species has distinct blood red or pink rhizomes and leaf bases. The conservation status of D. haematica was assessed by the New Zealand Threat Classification System in 2023 as "Not Threatened".

Coprosma fowerakeri is a species of Coprosma found in the South Island of New Zealand described in 2003. It was previously included within C. pseudocuneata. It was named after the New Zealand botanist Charles Ethelbert Foweraker.

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Asplenium cimmeriorum, commonly known as the cave spleenwort, is a species of small fern in the family Aspleniaceae. Endemic to New Zealand, they are only found in the western coasts, from Waitomo in the North Island, to Punakaiki in the South Island. It grows in dark environments with high rainfall, such as cave walls and ceilings, and in the South Island, on rotting logs. The species was first described by Patrick Brownsey and Peter de Lange in 1997.

Sophora molloyi, the Cook Strait kōwhai, Molloy's kōwhai or Stephen's Island kōwhai, one of 8 species of kōwhai native to New Zealand, grows naturally around the Cook Strait region. It was first described as a species in 2001 and named after Brian Molloy of Landcare Research, who was a researcher and scientist for more than 30 years.

Myosotis lytteltonensis is a species of flowering plant in the family Boraginaceae and a synonym of Myosotis australis. It was first described as a variety of M. australis, considered endemic to the South Island of New Zealand, then raised to species status, and subsequently synonymised with Myosotis australis in 2020. Plants of this species of forget-me-not are perennial rosettes with ebracteate inflorescences and white or yellow corollas with stamens that are fully included in the corolla tube or sometimes partly exserted.

Myosotis glauca is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. George Simpson and J.S. Thomson described M. pygmaea var. glauca in 1942, and Peter de Lange and John Barkla recognized it at species rank in 2010. Plants of this species of forget-me-not are perennial with a prostrate habit, bracteate inflorescences, white corollas, and often glaucous grey leaves.

Myosotis brevis is a species of flowering plant in the family Boraginaceae, endemic to New Zealand. George Simpson and J.S. Thomson described M. pygmaea var. minutiflora in 1942, and Peter de Lange and John Barkla recognized it at species rank in 2010, as M. brevis. Plants of this species of forget-me-not are small and annual, with a prostrate habit, bracteate inflorescences, tiny white corollas, and brown or green leaves.

Kunzea salina is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to the south of Western Australia. It is a low, spreading, densely branched shrub with leaves mostly arranged in opposite pairs and usually two sessile pale pink to white flowers arranged at the base of new shoots. It only grows near the edge of certain salt lakes.

Alternanthera nahui, commonly known as nahui, is a species in the family Amaranthaceae, native to New Zealand and to Norfolk Island.

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Atriplex hollowayi, also known as Holloway's crystalwort, is a species of annual herbaceous plant in the genus Atriplex. This species is endemic to New Zealand. It has the "Nationally Critical" conservation status under the New Zealand Threat Classification System.

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Achyranthes margaretarum is a species of plant belonging to the family Amaranthaceae. It is endemic to Phillip Island, close to Norfolk Island in the south west Pacific Ocean, where it was discovered during the 1980s after rabbits had been eradicated from the island. This provides dramatic evidence of the value of the eradication program. It is considered critically endangered due to its very small population size – fewer than 20 mature individuals were known, in a single location on Phillip Island, in 2003. In 2009 Mills identified 22 plants on Phillip Island, including planted specimens,

Simplicia felix is a rare, recently described species of true grass in the tribe Poeae from New Zealand.