Thomas Douglas Victor Swinscow

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Umbilicaria africana is a species of foliose lichen in the family Umbilicariaceae. Initially described as a variety under Gyrophora haplocarpa by Antonio Jatta in 1908, it was elevated to species status in 1986. This lichen is predominantly found on boulders of siliceous rock in the high alpine zones of the tropical mountains of South America and parts of Africa.

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Parmotrema apricum is a species of corticolous lichen in the family Parmeliaceae that is found in Africa. It was originally placed in the genus Parmelia by authors Hildur Krog and Dougal Swinscow in 1981. The holotype collection was made in the Machakos County, north of Kibwezi town in Kenya, where it was found growing on shrubs in a sun-exposed dry location. Two years later, the authors transferred it to the genus Parmotrema. The leathery thallus of Parmotrema apricum is bright yellow to yellow-green, comprising lobes that are 0.5–1 cm wide. Apothecia and pycnidia are not known for this

Parmotrema amaniense is a species of corticolous lichen in the family Parmeliaceae. Found in Africa, the lichen was originally described by J. Steiner and A. Zahlbruckner as a species of Parmelia in 1926. The holotype collection was made in Usambara (Tanzania) at an elevation of 800 metres (2,600 ft). Krog & Swinscow transferred the taxon to Parmotrema in 1983. Secondary chemicals present in Parmotrema amaniense include alectoronic acid, protocetraric acid, and atranorin. In addition to Tanzania, it has been recorded in Uganda, Angola, Malawi, Mozambique, Sierra Leone, Zambia, and Zimbabwe.

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