This design style was heavily influenced by the Arts & Crafts movement, in design and attitude. Art Nouveau saw the beauty in furniture of its orginal state. This age was very creative in designing as you will see below. It was also similar to the Art & Crafts movement in attitude, by its promoting and advertising of cabaret's and nightclubs, as it was rebellious in not conforming with the Victorian beliefs.
1. Posters were how many of the changes were seen in this age. It is easier to see how style and design changes throughout the years. For example, this poster below is alot more simpler and basic than the Victorian age posters.
Borders are still very important in these times, as you can see with this poster. Even if it is a white border with rounded corners. The same has been applied in the other floral design. It's very much alike the Victorian styles. However, in the blue flower design begins to push boundaries by placing the leaf over the border, coming off the page.
2. I like the next picture, it shows the creativity that Art Nouveau inspired. This 1911 kitchen utensil set is gorgeous in how different from other styles have been. The shape of the handles represents leaves which refers back to the Arts & Crafts Movement, where nature is the influence to designs.
Here are some more designs and pictures from Art Nouveau.