Of the four major categories of floral style the final one is what I consider rustic, organic. It's tends to be rich in hues, think fall colors, all things warm, what you would envision if you had a dinner in Tuscany. Though I'm sure many of you will think you can do rustic in pastels, I prefer when rustic (which has elements of the earth) is done in richer, deeper hues. Decor elements could be wood containers, branch materials, sunflowers, succulent or airplants, lots of texturals, non tropical foliage, garlands, Tuscany stone, rustic chairs, wrought iron, herbs, natural linens. I think you get it!
Here is a few examples of rustic organic.