Primula are herbaceous or semi-evergreen perennials, forming a basal rosette of simple leaves, with salver-shaped or bell-shaped flowers which may be solitary or carried in an umbel or in whorls on an erect stem
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Double-flowered polyanthus are rosette-forming evergreen or herbaceous perennials, sometimes grown as annuals, with umbels of salver-shaped, double flowers in winter or spring.