Dave Thompson scan
Roswell P. Flower was a powerful man in New York. His political career included two stints in the US Congress and a term as Governor of New York. He owned his own Wall Street banking house, R. P. Flower & Company, and was one of Wall Streets most aggressive market bulls.
Just why R P Flower & Co used the crosses in their cancels I can't say, though I suppose if one wasn't so familiar with the military associations of the Maltese Cross then it could look a bit like a flower.
Roswell Pettibone Flower
1835 - 1899
US Congressman, New York, 1881 - 1883, 1889 - 1891
Governor of New York, 1892 - 1894