Timothy Andrew Hammer

Australian botanist and plant taxonomist (1984–).

Timothy Andrew Hammer is an Australian botanist and plant taxonomist at the University of Adelaide and State Herbarium of South Australia. He was awarded a PhD from the University of Western Australia in 2019, completing a thesis on the taxonomy and systematics of Ptilotus and related genera in Amaranthaceae. In addition to Ptilotus, he has published taxonomic revisions and new species for the very diverse genus Hibbertia in the family Dilleniaceae, and he has authored the Flora of Australia treatments of Dilleniaceae, including the genera Dillenia, Hibbertia and Tetracera. In 2021, Tim Hammer

Abbreviations: T.Hammer
Occupations: university teacher, researcher, botanist, taxonomist, botanical collector
Citizenships: United States, Australia
Languages: English
Dates: 1984-01-01T00:00:00Z
Birth place: Illinois
Direct attributions: 47 plants, 0 fungi
Authorship mentions: 47 plants, 0 fungi

47 plants attributed to47 plants:

Wadithamnus artemisioides (Aerva Artemisioides) (Vierh. & O.Schwartz) T.Hammer & R.W.Davis 2017
plant species in the amaranthaceae family
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Wadithamnus T.Hammer & R.W.Davis 2017
plant genus in the amaranthaceae family
Wadithamnus artemisioides is a species of flowering plant belonging to the family Amaranthaceae. It is a subshrub or shrub native to Yemen and Oman in the southern Arabian Peninsula. It is the sole species in genus Wadithamnus. Two subspecies are accepted: Wadithamnus artemisioides subsp. artemisioides – southern Yemen Wadithamnus artemisioides subsp. batharitica (A.G.Mill. & J.A.Nyberg) T.Hammer & R.W.Davis – southern Oman
Paraerva T.Hammer 2019
plant genus in the amaranthaceae family
Paraerva is a genus of flowering plants in family Amaranthaceae. It includes two species which are endemic to the Socotra archipelago. Paraerva microphylla (Moq.) T.Hammer Paraerva revoluta (Balf.f.) T.Hammer
Ptilotus modestus (Paper Foxtail) T.Hammer 2018
annual plant species in the amaranthaceae family
Ptilotus modestus, commonly known as paper foxtail is a species of flowering plant in the family Amaranthaceae and is endemic to eastern continental Australia. It is an erect annual or short-lived perennial herb, with lance-shaped leaves at the base of the plant, more or less sessile stem leaves, and oval to hemispherical spikes of green flowers.
Ptilotus eremita (S.Moore) T.Hammer & R.W.Davis 2018
annual plant species in the amaranthaceae family
Ptilotus eremita is a species of flowering plant in the family Amaranthaceae and is endemic to the south-west of Western Australia. It is a sometimes prostrate, annual herb with hairy leaves on the stems and at the base of the plant and green or yellow, oval or cylindrical spikes of flowers.
Ptilotus benlii R.W.Davis & T.Hammer 2017
plant species in the amaranthaceae family
Ptilotus benlii is a species of flowering plant in the family Amaranthaceae and is endemic to northern Western Australia. It is an erect, perennial herb with a ribbed stem, narrowly lance-shaped stem leaves with the narrower end towards the base, green or white, oval or cylindrical spikes of flowers with long, silky hairs, and five fertile stamens.
Paraerva microphylla (Moq.) T.Hammer 2019
plant species in the amaranthaceae family
Paraerva microphylla is a species of flowering plant in the family Amaranthaceae. It is a subshrub or shrub endemic to the islands of Socotra and Abd al Kuri in the Socotra archipelago off the coast of East Africa, which are politically part of Yemen. Its natural habitat is dry shrubland, generally on cliffs and rock surfaces, often overlooking the sea. On the island of Socotra it rarely grows above 200 meters elevation, and up to 350 meters on Ras Shu'ub at the western end of the island. On Abd al Kuri and Samhah islands it grows up to 650 meters elevation.
Ptilotus falcatus R.W.Davis & T.Hammer 2014
plant species in the amaranthaceae family
Ptilotus falcatus is a species of flowering plant in the family Amaranthaceae and is endemic to Western Australia. It is a prostrate to ascending perennial herb with annual stems from a woody rootstock, lance-shaped stem leaves with the narrower end towards the base, and single green or white, oval spikes of flowers.
Ptilotus davisii (Davis's Mulla Mulla) T.Hammer 2020
perennial plant species in the amaranthaceae family
Ptilotus davisii, commonly known as Davis's mulla mulla, is a species of flowering plant in the family Amaranthaceae and is endemic to the south-west of Western Australia. It is a perennial herb with hairy, linear to lance-shaped leaves, and hemispherical to spherical spikes of pink or magenta flowers.
Ptilotus angustifolius (Benl) T.Hammer 2018
plant species in the amaranthaceae family
Ptilotus angustifolius, commonly known as regal fox tails, is a species of flowering plant in the family Amaranthaceae and is endemic to South Australia. It is a low, bushy herb with several stems, narrowly egg-shaped leaves at the base of the plant, oval, intensely fragrant spikes of purple flowers and cylindrical heads of many long, hairy fruits.
Paraerva revoluta (Balf.f.) T.Hammer 2019
plant species in the amaranthaceae family
Paraerva revoluta is a species of flowering plant in the family Amaranthaceae. It is a shrub endemic to the archipelago of Socotra, which is biogeographically part of East Africa and politically part of Yemen. It grows in semi-deciduous and evergreen submontane woodlands on the granite slopes of the Hajhir Mountains, where it is locally common in clearings from 500 to 950 meters elevation, and occasionally as low as 250 meters.
Swainsona katjarra R.W.Davis & T.Hammer 2020
plant species in the fabaceae family
Swainsona katjarra, commonly known as Birriliburu swainsona, is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is an erect annual herb with imparipinnate leaves with 4 to 6 lance-shaped to egg-shaped to elliptical leaflets, and racemes of 15 to 25 magenta flowers.
Ptilotus xerophilus T.Hammer & R.W.Davis 2019
plant species in the amaranthaceae family
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Ptilotus clivicola R.W.Davis & T.Hammer 2014
plant species in the amaranthaceae family
Ptilotus clivicola is a species of flowering plant in the family Amaranthaceae and is endemic to the south-west of Western Australia. It is a prostrate perennial to upright herb with flat, lance-shaped leaves with the narrower end towards the base on the stems, magenta, oval or cylindrical spikes of flowers with five stamens.
Ptilotus actinocladus T.Hammer & R.W.Davis 2018
plant species in the amaranthaceae family
Ptilotus actinocladus is a species of flowering plant in the family Amaranthaceae and is endemic to inland Western Australia. It is a prostrate annual herb with a central stem and radiating lateral stems, linear to lance-shaped stem leaves, pink spherical or cylindrical spikes of flowers with long, silky hairs, and four fertile stamens.
Wadithamnus artemisioides ssp. batharitica (A.G.Mill. & J.A.Nyberg) T.Hammer & R.W.Davis 2017
plant subspecies in the amaranthaceae family
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Ptilotus yapukaratja R.W.Davis & T.Hammer 2018
plant species in the amaranthaceae family
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Ptilotus unguiculatus T.Hammer 2018
plant species in the amaranthaceae family
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Ptilotus uncinellus (A.R.Bean) T.Hammer 2019
plant species in the amaranthaceae family
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Ptilotus psilorhachis T.Hammer & R.W.Davis 2019
plant species in the amaranthaceae family
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Ptilotus ostentans T.Hammer & R.W.Davis 2024
plant species in the amaranthaceae family
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Ouret triangularifolia (Cavaco) T.Hammer 2019
plant species in the amaranthaceae family
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Ouret humbertii (Cavaco) T.Hammer 2019
plant species in the amaranthaceae family
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Ouret coriacea (Schinz) T.Hammer 2019
plant species in the amaranthaceae family
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Swainsona picta R.W.Davis & T.Hammer 2022
plant species in the fabaceae family
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Ptilotus crinitus T.Hammer & R.W.Davis 2021
plant species in the amaranthaceae family
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Ptilotus clivicolus R.W.Davis & T.Hammer 2014
plant species in the amaranthaceae family
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Hibbertia wandoo (J.R.Wheeler) T.Hammer & K.R.Thiele 2024
plant species in the dilleniaceae family
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Hibbertia triquetra T.Hammer 2022
plant species in the dilleniaceae family
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Hibbertia subvillosa (Domin) K.R.Thiele & T.Hammer 2022
plant species in the dilleniaceae family
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