There's no specific meaning of "type flower" related to palindromes. Palindromes are words, phrases, or numbers that read the same backward as forward. Examples include:
* Racecar
* Madam, I'm Adam
* A Toyota's a Toyota
It's possible you're thinking of a different word or phrase related to palindromes, or perhaps you're looking for a word that itself is a palindrome and is related to flowers.
Could you please clarify your question?