Ladybird4 said: They are succulents - a huge family of plants. You might find something useful herehttps://www.drought-smart-plants.com/succulent-identification-chart.html
Paul B3 said: 1&2 Zamioculcas zamiifolia3&4 Tradescantia navicularis
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3&4 Tradescantia navicularis
Looking at images of Zamioculcas , it evidently isn't that .
Help !! Does anyone know for sure ?