Former Stydd Nursery owner Catherine Penny has the Rosa-Hybrid Musk Intro by Pemberton & Bentall 1912-39 Historic Collection at Dutton Hall, Lancashire.
Alan Gray and Graham Robeson of East Ruston Old Vicarage have a Colchicum Historic Collection, collected from Felbrigg Hall, Richard Hobbs, specialist growers and individual collectors.
The conservation status of two cultivars in the Collection (Colchicum ‘Jolanthe’ and C. speciosum ‘Maximum’) have improved as a result of being registered in a National Plant Collection.
Clivia is a Reference Collection in Hampshire which June James has duplicated from the collection of Mike Jeans.
Fragaria Vesca is a Reference Collection belonging to Dianne and David Nichol-Brown of Polemonium Plantery in Country Durham.
They already have National Plant Collections of Polemonium, Collomia, Gilia, Leptodactylon (Polemoniaceae) and Hakonechloa.
Plant Heritage chief executive officer Sarah Quarterman said: "This latest group of Collections illustrate the variety of plants forms we welcome as Collections and their wide geographic spread across the UK.
"With these new Collection Holders now equipped with the support and knowledge needed to conserve their precious cultivars, it is more likely that these plants will be around for future generations to come."