Ion James Muirhead Williams

South african engineer and botanist (1912-2001).

Abbreviations: I.Williams
Occupations: scientific collector, explorer, environmentalist, engineer, botanist, botanical collector
Citizenships: South Africa
Languages: English
Dates: 1912-06-29T00:00:00Z – 2001-01-07T00:00:00Z
Birth place: Cape Colony
Direct attributions: 106 plants, 0 fungi
Authorship mentions: 106 plants, 0 fungi
Links:IPNIVIAF

106 plants attributed to106 plants:

Leucadendron salicifolium (Common Stream Conebush) (Salisb.) I.Williams 1967
plant species in the proteaceae family
Leucadendron salicifolium, the common stream conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs from Porterville to Kogelberg and Langeberg.
Leucadendron arcuatum (Red-edge Conebush) (Lam.) I.Williams 1967
plant species in the proteaceae family
Leucadendron arcuatum, the red-edge conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron procerum (Ivory Conebush) (Salisb. ex Knight) I.Williams 1967
vulnerable plant species in the proteaceae family
Leucadendron procerum, the ivory conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron globosum (Grabouw Conebush) (Andrews) I.Williams 1967
critically endangered plant species in the proteaceae family
Leucadendron globosum, the Grabouw conebush, is a flower-bearing shrub belonging to the genus Leucadendron. It forms part of the fynbos biome. The plant is native to the Western Cape, South Africa.
Coleonema pulchellum (Pink Breath Of Heaven) I.Williams 1981
plant species in the rutaceae family
Coleonema pulchellum, commonly known as confetti bush, buchu, diosma or breath of heaven, is a shrub which is endemic to the Cape Provinces of South Africa.
Leucadendron olens (Yellow Conebush) I.Williams 1981
vulnerable plant species in the proteaceae family
Leucadendron olens, the yellow conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron meridianum (Limestone Conebush) T.M.Salter ex I.Williams 1967
plant species in the proteaceae family
Leucadendron meridianum, the limestone conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron flexuosum (Worcester Conebush) I.Williams 1967
critically endangered plant species in the proteaceae family
Leucadendron flexuosum, the Worcester conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, where it occurs in the Breede River Valley near Worcester.
Leucadendron conicum (Garden-route Conebush) (Lam.) I.Williams 1967
plant species in the proteaceae family
Leucadendron conicum, the garden route conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and is part of the fynbos form. The plant is native to the Western Cape and the Eastern Cape, where it occurs in the Langeberg, Outeniqua Mountains, Tsitsikamma Mountains, Elandsberg and Garden Route plain.The shrub grows to be 6 m and bears flowers from October to November. In Afrikaans it is known as vaaltolbos. The tree is number 78.1 on the National List of Indigenous Trees in South Africa.
Leucadendron chamelaea (Witsenberg Conebush) (Lam.) I.Williams 1967
critically endangered plant species in the proteaceae family
Leucadendron chamelaea, the Witsenberg conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron barkerae (Swartberg Conebush) I.Williams 1967
plant species in the proteaceae family
Leucadendron barkerae, the Swartberg conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron tinctum (Spicy Conebush) I.Williams 1968
plant species in the proteaceae family
Leucadendron tinctum, the spicy conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, where it occurs in the Hex River Mountains up to Hottentots Holland Mountains and Langeberg. The shrub grows 1.3 m tall and bears flowers from July to August. Fire destroys the plant but the seeds survive. The seeds are stored in a cone on the female plant and fall to the ground two months after the plant has flowered. The plant is unisexual and there are male and female plants. The fertilization is done by small
Leucadendron teretifolium (Needleleaf Conebush) (Andrews) I.Williams 1967
plant species in the proteaceae family
Leucadendron teretifolium, the needle-leaf conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron spissifolium (Spearleaf Conebush) (Salisb. ex Knight) I.Williams 1967
plant species in the proteaceae family
Leucadendron spissifolium, the spear-leaf conebush, is a species of plant in the family Proteaceae. It was first described in 1809 as Euryspermum spissifolium. It was renamed Leucadendron spissifolium in 1967.
Leucadendron singulare (Kammanassie Conebush) I.Williams 1967
vulnerable plant species in the proteaceae family
Leucadendron singulare, the Kammanassie conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs in the Mannetjiesberg in the Kammanassie Mountains. The plant is rare. The shrub grows only 30 cm high and spreads out. It blooms in October. The plant dies after a fire, but the seeds survive. The seeds are stored in a toll on the female plant and fall out of the toll to the ground after two months where they are spread by ants. The plant is single-faced and there are separate plants with male and
Leucadendron rourkei (Uniondale Conebush) I.Williams 1972
plant species in the proteaceae family
Leucadendron rourkei, the Uniondale conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape and Eastern Cape, South Africa. The plant is rare.
Leucadendron pubibracteolatum (Purpleleaf Conebush) I.Williams 1972
plant species in the proteaceae family
Leucadendron pubibracteolatum, the purple-leaf conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape and Eastern Cape. In Afrikaans, it is known as persblaartolbos.
Leucadendron modestum (Roughleaf Conebush) I.Williams 1967
plant species in the proteaceae family
Leucadendron modestum, the rough-leaf conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron loeriense (Loerie Conebush) I.Williams 1967
plant species in the proteaceae family
Leucadendron loeriense, the Loerie conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, where it is found in the Elandsberg, Baviaanskloof and Groot-Winterhoek mountains. The shrub grows 2.5 m tall and flowers in December and January. Fire destroys the plant but the seeds survive. The seeds are stored in a toll on the female plant and released where they fall to the ground and are possibly spread by the wind. The plant is unisexual, so there are separate plants with male and female flowers that are
Leucadendron laxum (Bredasdorp Conebush) I.Williams 1967
endangered plant species in the proteaceae family
Leucadendron laxum, the Bredasdorp conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa, where it occurs from Hermanus to Agulhas.
Leucadendron diemontianum (Visgat Conebush) I.Williams 1972
plant species in the proteaceae family
Leucadendron diemontianum, the Visgat conebush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs on the foothills of the Great Winterhoek Mountains at Visgat, Onderboskloof and Rosendal as well as at Heuningvlei in the northern Cederberg. The shrub grows 2.2 m tall and flowers in June. The plant dies in a fire but the seeds survive. The seeds are stored in a toll on the female plant and fall to the ground after a fire and are spread by the wind, the seeds have wings. The plant is unisexual and
Leucadendron concavum (Pakhuis Conebush) I.Williams 1969
vulnerable plant species in the proteaceae family
Leucadendron concavum, the Pakhuis conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs at the Pakhuis Pass in the Cederberg. The shrub grows 1.5 m tall and flowers in September. The plant dies in a fire but the seeds survive. The seeds are stored in a toll on the female plant and fall to the ground after a fire. The plant is unisexual and there are separate plants with male and female flowers, which are pollinated by insects. The plant grows mainly on a sandy plateau at elevations of 1
Leucadendron bonum (Gideonskop Conebush) I.Williams 1967
critically endangered plant species in the proteaceae family
Leucadendron bonum, the Gideonskop conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Leucadendron stelligerum (Agulhas Conebush) I.Williams 1967
endangered plant species in the proteaceae family
Leucadendron stelligerum, the Agulhas conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs from Elim to the Agulhas Plain. The shrub grows 2 m tall and flowers from July to August. The plant dies after a fire but the seeds survive. The seeds are stored in a toll on the female plant and fall to the ground after a fire, possibly spreading by the wind. The plant is unisexual and there are separate plants with male and female flowers, which are pollinated by the action of insects. The plant
Leucadendron spirale (Wolseley Conebush) (Salisb. ex Knight) I.Williams 1967
extinct plant species in the proteaceae family
Leucadendron spirale, the Wolseley conebush, was a flower-bearing shrub belonging to the genus Leucadendron and formed part of the fynbos. The plant was native to the Western Cape where it was found in the Breede River Valley between Wolseley and Botha, before becoming extinct. The plant was observed only four times, in 1801, 1819, 1820s and 1933. In Afrikaans it is known as Wolseley-tolbos.
Leucadendron loranthifolium (Green-flower Sunbush) (Salisb. ex Knight) I.Williams 1967
plant species in the proteaceae family
Leucadendron loranthifolium, commonly known as the green-flower sunbush, is a flower-bearing shrub belonging to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape where it occurs in the Gifberg, Cederberg, Sandveld, and Hex River Mountains. The shrub grows 2.0 m (6.6 ft) tall and flowers from July to September. The plant dies after a fire but the seeds survive. The seeds are stored in a toll on the female plant and fall out of the toll soil after two months where they are spread by rodents. The plant is unisexual and there are separate plants with
Leucadendron burchellii (Riviersonderend Conebush) I.Williams 1972
vulnerable plant species in the proteaceae family
Leucadendron burchellii, the Riviersonderend conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Diosma prama (Gum Bitterbuchu) I.Williams 1975
plant species in the rutaceae family
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Diosma haelkraalensis I.Williams 1979
plant species in the rutaceae family
Diosma haelkraalensis, or Hagelkraal's diosma, is a rare species of plant endemic to the southwestern Cape Provinces of South Africa.
Diosma awilana (Baardskeerders Bitterbuchu) I.Williams 1975
plant species in the rutaceae family
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