The Comoros archipelago is located in the northern part of the Mozambique Channel halfway
between Madagascar and Africa. Its plant population results from a combination of elements
coming from these two neighbouring entities. The characteristics of the woody flora of Karthala,
the only climax forest in Grande-Comore, the largest and most westerly of these islands, have
been described and allowed to establish the presumed origins of the plant stand of this island.
The collection of data was done using the vegetation survey method and their analyzes were
carried out around the diversity of the flora, its structure, biogeography, but also its affinities
with the flora of Africa and of Africa. Madagascar. A great diversity of the ligneous flora was
noted (95 species distributed in 82 genera and 45 families), with a rate of endemism evaluated at
26% of which 19,3% at the scale of the whole archipelago and 6.3% strict endemic to GrandeComore.
Of all the flora inventoried, and except the endemic species of the archipelago, there are
only three species absent from the flora of Madagascar, which suggests that the flora of GrandeComore
would be more Malagasy than African .