Publication: Sp. Pl. 464 1753 Bibliography Major references and further lectures Roman Letz “Jovibarba globifera (L.) J. PARN. (Crassulaceae, Sempervivoideae) in Bratislava (Slovakia): notes on taxonomy, nomenclature, distribution, ecology and conservation status” Biologia, Bratislava, 52/1: 41-47, 1997 Cultivars and forms (3) Subspecies (3) Sempervivum globiferum subs. allioniiSempervivum globiferum subs. arenariumSempervivum globiferum subs. hirtum