Diane Mary Bridson

Psychotria bimbiensis is a species of plant in the family Rubiaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Hyperacanthus is a flowering plant genus in the family Rubiaceae, occurring on Madagascar and nearby southern Africa, approximately from Mozambique to the southernmost parts of the continent. This genus used to contain only 5 species, but the number has tripled since a number of plants formerly believed to be genip-trees – the "Genipa sensu Drake" group – were recognized to be not as closely related to genips as was previously believed. Those species are now placed in Hyperacanthus, at least provisionally: Hyperacanthus ambovombensis Rakotonas. & A.P.Davis Hyperacanthus amoenus (Sims) Bridson

Pavetta manyanguensis is a species of plant in the family Rubiaceae. It is endemic to Tanzania.

Pavetta lynesii is a species of plant in the family Rubiaceae. It is endemic to Tanzania.

Coffea kapakata, also known as kapakata, is a putative species of plant in the genus Coffea, more commonly known as coffee, that is native to western Angola and Congo. Specimens were collected in 1932, but precise locality details are uncertain, and no other specimens have since been discovered. Because so little information is known about it, its conservation status is categorised as 'data deficient'.

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Pavetta nitidissima is a species of plant in the family Rubiaceae. It is endemic to Tanzania.

Kraussia socotrana is a species of plant in the family Rubiaceae. It is endemic to Socotra, Yemen. Its natural habitats are subtropical or tropical dry shrubland and rocky areas. The type was collected from Wadi Irih on the Nogad Plain. It is a shrub up to 1m tall. The leaves are elliptic to oblong-elliptic, rounded to obtuse at the apex and rounded to cuneate at the base. Domatia are absent and the petioles are up to 5mm long. Flowers are carried in 3 to 8-flowered cymes. They are white, sometimes pink on the outside, forming a tube 6 to 7mm long.

Ixora baileyana is a species of flowering plant in the coffee and gardenia family Rubiaceae, first described in 1987. It is found only in the Wet Tropics bioregion of Queensland, Australia.

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Rothmannia macrosiphon is a species of plant in the family Rubiaceae. It is found in Kenya and Tanzania.

Psydrax obovatus is a species of flowering plant in the family Rubiaceae. It is a shrub or tree native to southern Africa, where it ranges from the Cape Provinces to KwaZulu-Natal, the Northern Provinces, Mozambique, and Zimbabwe. Two subspecies are accepted: Psydrax obovatus subsp. ellipticus Bridson – Mozambique, Northern Provinces, and Zimbabwe Psydrax obovatus subsp. obovatus – Cape Provinces, KwaZulu-Natal, Mozambique, and Northern Provinces

Psydrax livida (green-twigs quar) is an Afrotropical shrub or small tree in the family Rubiaceae. It occurs in eastern and southern Africa, including Burundi, Kenya, the DRC, Tanzania, Malawi, Mozambique, Zambia, Zimbabwe, Angola, Botswana, northern Namibia and northern South Africa. It is deciduous or evergreen, and its green branches have an opposite and horizontal arrangement.

Psydrax ficiformis is a species of flowering plant in the family Rubiaceae. It is endemic to southern India.

Phellocalyx is a genus of flowering plants belonging to the family Rubiaceae. Its native range is Tanzania to Mozambique.

Keetia gueinzii is an evergreen scandent shrub in the family Rubiaceae. The species epitheton is named after Wilhelm Gueinzius, a German naturalist who collected plants in South Africa. It became the type species of Keetia after the original type species, Keetia transvaalensis, was made a synonym. This species is found down the southern African east coast in Malawi, Zimbabwe, Mozambique and South Africa. Young branches are covered with rust-coloured hairs. Leaves measure 5.5–13.5 × 3.5–6 cm, more or less lanceolate to ovate, acuminate apex, rounded to cordate at the base, often bullate, and

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Tarenna luhomeroensis is a species of plant in the family Rubiaceae. It is endemic to Tanzania.

Tarenna drummondii is a species of plant in the family Rubiaceae. It is found mainly in Kenya and Tanzania in East Africa.

Rutidea nigerica is a species of plant in the family Rubiaceae. It is found in Benin, Cameroon, and Nigeria. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.