Susan Carter Holmes

Aloe juvenna (tiger-tooth aloe) is a species of plant in the genus Aloe. It is popular in cultivation but extremely rare in its natural habitat in Kenya.

Euphorbia actinoclada is a species of plant in the family Euphorbiaceae. It is endemic to Kenya, Somalia, and Ethiopia. As most other succulent members of the genus Euphorbia, its trade is regulated under Appendix II of CITES.

Aloe fimbrialis is a succulent plant species from Zambia and possibly Tanzania. A very unusual Aloe as it forms a caudex which can grow to five centimeters in diameter, the leaves grow up to ten centimeters long. The inflorescence can reach 90 centimeters in length and has coral-pink flowers. It usually grows on termite mounds. Aloe fimbrialis is a very rare aloe, first discovered in 1964 and formally described by Susan Carter Holmes in 1996 from a herbarium specimens. Graham Williamson rediscovered the species in 2002 on the border of Zambia and Angola, close to the source of the Zambezi

Aloe carnea is a species of Aloe native to Mozambique and Zimbabwe.

Euphorbia tanaensis, commonly known as the Tana River euphorbia, is a critically endangered flowering plant within the family Euphorbiaceae. This species is endemic to a specific location along the Tana River in Kenya. Discovered initially as a group of nine specimens in 1988, a follow-up survey conducted in 2006 found only four remaining individuals, with no evidence of natural regeneration. The habitat of Euphorbia tanaensisis is under threat from ongoing deforestation.

Euphorbia bwambensis is a species of plant in the family Euphorbiaceae. It is found in the Republic of the Congo and Uganda.

Euphorbia baioensis is a species of flowering plant in the family Euphorbiaceae. This spiny succulent plant is originally from Kenya. It is found in tropical deserts and flourishes in hot dry conditions.

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Euphorbia dhofarensis is a species of flowering plant in the family Euphorbiaceae, endemic to Oman, where it is found in the Dhofar region, in stony wadi between 50 and 650 metres in altitude. As most other succulent members of the genus Euphorbia, its trade is regulated under Appendix II of CITES.

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Euphorbia smithii is a species of plant in the family Euphorbiaceae. It is endemic to Oman. It is threatened by habitat loss.

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