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Referred to in the Register and Checklist
K- ‘Kapac, Jay USA.’
- ‘Kefford, Ben UK.’
- ‘Kemp Aust. (later Kemp’s Nursery)’
- ‘Kendall NZ.’
- ‘Kerrigan, Howard W. USA.’
- ‘Keteleer Fr.’
- ‘Key, Mrs. Hazel UK. (Fibrex Ltd.)’
- ‘Kinghorn F.R. UK.’
- ‘Kitson, Keith UK.’
- ‘Knicely-Yoder USA.’
- ‘Koopiwitz USA.’
- ‘Krauss USA.’
- ‘Kubchina Swz.’