Passing progmem string to a function

Projects Programming
4

Got the following error:

cannot convert 'const char*' to 'const __FlashStringHelper*' for argument '1' to 'void printlnStoredString(const __FlashStringHelper*)

Edit: Changed gears a little bit and followed this tutorial by Nick Gammon.

Code now looks like this:

const char stringTable[6][10] PROGMEM {
  {"String 1"},
  {"String  2"},
  {"String  3"},
  {"String  4"},
  {"String  5"},
  {"String  6"}
};

void printStoredString(const char* str, bool newLine = false){
  char c;
  if(!str){ return; }
  while((c = pgm_read_byte(str++))){ Serial.print(c); }
  if(newLine){ Serial.println(); }
}

void loop(){
    for(int i = 0; i < 6; i++){
        printStoredString(stringTable[i], true);
    }
}

Seems to be working just fine, and uses fewer lines of code, but would have less memory savings if my string sizes varied greatly.