LECTOTYPIFICATION OF SOME ARABIAN APOCYNACEAE

Abstract

Lectotypes are selected for the following names in the Apocynaceae from the Arabian Peninsula: Adenium arabicum Balf.f., Adenium obesum (Forssk.) Roem. & Schultes, Caralluma adenensis (Deflers) A.Berger, Cryptolepis intricata (Balf.f.) Venter, Cryptolepis volubilis (Balf.f.) O.Schwartz, Kanahia laniflora (Forssk.) R.Br., Leptadenia arborea (Forssk.) Schweinf., Marsdenia robusta Balf.f., Rhazya stricta Decne. and Tylophora yemensis Deflers. For Secamone socotrana Balf.f., it is noted that a previous citation of a holotype is rather an effective designation of a lectotype. Neotypes are selected for Caralluma hexagona var. septentrionalis Lavranos & L.E.Newton, Glossonema boveanum (Decne.) Decne., Leptadenia pyrotechnica (Forssk.) Decne. and Orbea chrysostephana (Deflers) Bruyns.