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Referred to in the Register and Checklist
M- ‘MacInerney Mrs. Aust.’
- ‘Magnollay Cz.’
- ‘Magson UK.’
- ‘Malet Beig.’
- ‘Mallet Fr.’
- ‘Manns K.W. & N. Aust. (La Jolla Nursery)’
- ‘Manns Mrs. N.’
- ‘Margate Parks Dept. UK.’
- ‘Martin of Crowborough UK.’
- ‘Martin, Mr & Mrs Roland UK.’
- ‘Martine Fr.’
- ‘Martorel Fr.’
- ‘Massey J. UK.’
- ‘Massheder, Guy UK. (Ashfield Nurseries)’
- ‘Matin Fr.’
- ‘Maud Mrs. H. Aust.’
- ‘Maudsley UK.’
- ‘May, Clara & Harry USA.’
- ‘McAdams USA.’
- ‘McBain Aust.’
- ‘McCallum USA.’
- ‘McConach UK.’
- ‘McFarland Mrs C Aust.’
- ‘McGrath Mrs. J. Aust.’
- ‘McInery Aust.’
- ‘McKerral-Brown UK.’
- ‘McKilligan, Mrs. Rusty USA.’
- ‘McMillan Aust.’
- ‘McRae Mrs. E. Aust.’
- ‘Mepham UK.’
- ‘Mertes USA.’
- ‘Meyer Ger.’
- ‘Mezard Fr.’
- ‘Michell, Herny J. USA.’
- ‘Miellez Fr.’
- ‘Miles F. UK.’
- ‘Mill, Miss Claire Aust.’
- ‘Miller O.M. of Ramsgate UK.’
- ‘Miller, Holmes C. USA.’
- ‘Mitchell UK.’
- ‘Moll, Otto Swz.’
- ‘Monahan, Brian Aust.’
- ‘Money, Roland UK.’
- ‘Moore UK.’
- ‘Morden, UK. (The Geranium Nursery)’
- ‘Morf Aust.’
- ‘Morin’
- ‘Morton J.L. UK.’
- ‘Moule UK.’
- ‘Munier (Spalding)’