Here is just a few of the Plants from Socotra currently accessible at the Botanical Gardens Copenhagen.

/ Adenium obesum
/ Adenium socotranum (see link on synonym status)

/ Dorstenia gigas (endemic?)

/ Euphorbia abdelkuri , endemic to the island of Abd al-Kuri where only ca. 250 mature individuals are found at a single location covering less than 10 kmĀ².

 

Dorstenia gigas, close-ups:

 

Euphorbia abdelkuri: