Flower tattoos are for the most part a development of the past few decades, and testimony to the fact that it is now acceptable for a woman to get tattoos ( it wasn't always like this). A floral tattoo is often a good first tattoo for a woman who outgrew the age of the fake tattoo and wants something fairly subtle.
Flower tattoos can be pretty and rather feminine looking, but all the same there is considerable variety with regard to the style and overall look of the tattoo. They can be small and delicate or they can be big, bold, colorful and eclectic. You can have just a single flower or a chain of flowers.
But Flower tattoos are more than a pretty image on a pretty girl. Flowers are full of age-old symbolism (see further).