A genus of hardy herbaceous perennials, some of which are useful border plants, the dwarf species are good rock garden plants. Several are natives of the British Isles but those valued for gardens are from Europe, South America, and the […]
A genus of hardy herbaceous perennials, some of which are useful border plants, the dwarf species are good rock garden plants. Several are natives of the British Isles but those valued for gardens are from Europe, South America, and the […]