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Referred to in the Register and Checklist
G- ‘Gabbert Fr.’
- ‘Gaines N. UK.’
- ‘Gall, Mrs J. Aust.’
- ‘Gamble K. (D. Gamble & Sons, Highfield Nurseries) UK.’
- ‘Garfield UK.’
- ‘Garlick Aust.’
- ‘Garner UK.’
- ‘Garraway UK.’
- ‘Garth (Spalding)’
- ‘Garth Rev. R. UK.’
- ‘Gelding Aust.’
- ‘George J. UK.’
- ‘Gerbar, Josef Hgy.’
- ‘Gerbeaux F. Fr.’
- ‘Gerris V. NL.’
- ‘Getz Ger.’
- ‘Geunault Fr.’
- ‘Gibbons, John UK. Zonal Specialist’
- ‘Gibson Aust.’
- ‘Gibson UK.’
- ‘Gillam, Ian Can. Tricolour Stellar Specialist’
- ‘Glass UK. (Holmesdale Nurseries)’
- ‘Godding UK.’
- ‘Godfrey UK.’
- ‘Godwin, Peter UK.’
- ‘Goeshke (Spalding)’
- ‘Gooch, Albert Aust.’
- ‘Goode and Reese USA.’
- ‘Goode UK.’
- ‘Gordon, Peter Aust.’
- ‘Gotz W. Ger.’
- ‘Gough A.H.M. Aust.’
- ‘Gough Mr. Aust.’
- ‘Graham J. & Co. Aust.’
- ‘Grainger W. Can.’
- ‘Gray UK.’
- ‘Green J. UK.’
- ‘Greeves M. UK.’
- ‘Gregersen USA.’
- ‘Greybridge Geraniums (Later Fibrex Ltd.) UK.’
- ‘Grief A.G. UK.’
- ‘Grieger F. Hgy.’
- ‘Grieve, Peter UK.’
- ‘Grolam Aust.’
- ‘Gubler, Heinrich Swz.’
- ‘Guesnet Fr.’
- ‘Guilfoyle Aust.’
- ‘Gunnett UK.’