Source : Webster's Revised Unabridged Dictionary (1913)

Palmetto flag \Pal*met"to flag\
   Any of several flags adopted by South California after its
   secession. That adopted in November, 1860, had a green
   cabbage palmetto in the center of a white field; the final
   one, January, 1861, had a white palmetto in the center of a
   blue field and a white crescent in the upper left-hand
   corner.