Adenium Flowering Tips . Adenium is a genus of flowering plants that originate from Africa. Patterned Adenium flowers are any that have a strong and distinct pattern on the flowers; this may be in the form of a central star, a picotee pattern (white with dark border). Desert Rose Plant Care - Learn Some Adenium Desert Rose ... (Ian Anderson) A wide variety of adenium flower options are available to you, such as material, use, and. Adenium obesum is a poisonous species of flowering plant belonging to tribe Nerieae of subfamily Apocynoideae of the dogbane family, Apocynaceae, that is native to the Sahel regions, south of the Sahara (from Mauritania and Senegal to Sudan). Patterned Adenium flowers are any that have a strong and distinct pattern on the flowers; this may be in the form of a central star, a picotee pattern (white with dark border). Patterned Adenium flowers are any that have a strong and distinct pattern on the flowers; this may be in the form of a