Contents

• Bradleya 31 includes the following articles:
• Matucana rebutiiflora, a new cactus species
• Ferocactus wislizeni subsp. ajoensis, A new subspecies
• The genus Aloe in Djibouti
• A new miniature species of Borzicactus
• A putative Oreocereus x Echinopsis hybrid from southern Bolivia
• Vivipary in Ferocactus herrerae
• Notes on the nomenclature of species of Agave
• A new morphological study of the genus Trichodiadema and a new subgenus Gemiclausa
• The family Crassulaceae in continental Portugal
• Lobivia minutiflora: a cryptic species finally recognised
• The Gymnocalycium mostii aggregate
• Corrections for the validity of two Madagascan taxa in the genus Aloe
• Knersia gen. nov., an emigrant from Drosanthemum
• A note on four historical names recorded in Aloe
• Ectotropis now with a second species
• Names associated with Aloe speciosa
• Examples of a cephalium and a pseudocephalium
• Are nurse plants always necessary for succulent plants
• The correct name of Aloe plicatilis
• Orbea - an overview