Max Gürke

The Ebenaceae are a family of flowering plants belonging to order Ericales. The family includes ebony and persimmon among about 768 species of trees and shrubs. It is distributed across the tropical and warmer temperate regions of the world. It is most diverse in the rainforests of Malesia, India, Thailand, tropical Africa and tropical America. Many species are valued for their wood, particularly ebony, for fruit, and as ornamental plants.

Blyixa japonica is a species of plant in the family Hydrocharitaceae. It is known as Japanese blyxa or dwarf Asian grass.

Ocimum kilimandscharicum, also known as camphor basil, is a basil species native to Kenya, Tanzania, Uganda, Sudan, and Ethiopia.

Buchnerodendron is a genus of flowering plants belonging to the family Achariaceae. Its native range is Tropical Africa. Species: Buchnerodendron lasiocalyx (Oliv.) Gilg Buchnerodendron speciosum Gürke

Poggea is a genus of flowering plants belonging to the family Achariaceae. Its native range is western Tropical Africa and it is found in Angola, Cabinda Province, Cameroon, Congo, Gabon and Zaïre. The genus name of Poggea is in honour of Paul Pogge (1838–1884), a German explorer in Africa. It was first described and published in Bot. Jahrb. Syst. Vol.18 on page 162 in 1893.

Pereskia bahiensis is a species of tree-like cactus that is endemic to the Brazilian state of Bahia. It was transferred to Rhodocactus in 2016 as Rhodocactus bahiensis, but this placement was not accepted by Plants of the World Online as of April 2026. Like all species in the genus Pereskia, and unlike most cacti, it has persistent leaves. In its native locality, it is used to form hedges.

Euclea crispa, commonly known as the blue guarri, is an Afrotropical plant species of the family Ebenaceae. The hardy and evergreen plants may form a dense stand of shrubs, or grow to tree size. It is widespread and common in the interior regions of southern Africa, and occurs northward to the tropics. Though some are present near the South African south and east coasts, they generally occur at middle to high altitudes. It is readily recognizable from its much-branched structure and dull bluish foliage colour. Those bearing lanceolate leaves may however resemble the Wild olive, another common

Echinopsis mamillosa, synonym Lobivia mamillosa, is a species of cactus from Bolivia and northwest Argentina.

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Heliotropium balfourii is a species of plant in the family Heliotropiaceae. It is endemic to the island of Socotra in Yemen. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland.

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

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Echinopsis lateritia, synonyms including Lobivia lateritia, is a species of flowering plant in the cactus family Cactaceae, endemic to Bolivia. It was first described by Gürke in 1907.

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Diospyros bussei is a tree species found in Kenya and Tanzania, while its presence is uncertain in Somalia. Its habitat is shrubland. It is threatened through hacking and fires to create grassland for grazing.

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