The genus Eulophia in Madagascar
The orchid genus Eulophia consists of about 200 species which are very widely distributed in Africa, and also occur in Central America, India and South-East Asia.
The earliest descriptions of members of this genus were based on plants from South Africa. They were published in the late 18th century by the younger Linnaeus and were placed in the genus Satyrium. The generic name was published by Robert Brown in 1821, and in the same article the generic name Eulophus was suggested for an allied series of species, without a description or any formal transfer of epithets. This name was validly published in the form Eulophia two years later by Lindley.
Preliminary studies in the genus Eulophia showed that while some groups could be distinguished from one another without difficulty, others showed complex intergrading series, with or without higher frequencies of one or more forms. Complex variation patterns of this sort have been recorded before in the genus Eulophia. chiefly among the tropical African team (e.g. de Wildeman 1919, Summerhayes 1933, 1958).
The present work was undertaken to provide a much-needed taxonomic revision of the Madagascar members of the genus Eulophia R.Br. (Orchidaceae).
The genus is particularly well represented in South Africa where its distribution is centered in the Eastern Cape, KwaZulu-Natal, Mpumalanga and the Northern Province. While many Eulophias are endemic to this country, the distribution range of several species found here extends into Central and West Africa.

References:

POWO (2022). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/ Retrieved 27 November 2022."