Journal Vol 91-3

A Discussion of Transitional Dioecy in OperculicaryaExamination of an alternative reproductive strategy in Operculicarya hyphaenoidesDANIEL HOUSTON & JOSEPH STEAD Echinocereus reichenbachii subsp. baileyiROOT GORELICK Succulent endemic Crassulaceae from Argentina including three new taxaGUILLERMO PINO, ROBERTO KIESLING, WILLIAM ALE & DANIEL MARQUIEGUI Pachycereus lepidanthus (Eichlam) Britton & RoseLast stand in Honduras? — some personal observationsTOM CSEH CSSA Seed depot addendum 2019-1SUE HAFFNER Molecular study of the genus Copiapoa (Cactaceae) Part IVFRED KATTERMANN A visit to the Jardin Exotique de MonacoZLATKO JANEBA Arizona's wayward Organ PipesWILLIAM THORNTON