Cotton dresses are so much more comfortable than blends or manmade fabrics. mingo & grace have a unique and yet classic dress pattern on sale now that would work with many colors and flowery prints for Spring and Summer.
7380 by Melissa Watson. Again, this would look very nice with an even-length lowered hem. It has an interesting placket for the front opening. The skirt is A-line shaped.
While perusing dress styles I have noticed that there are very few details on American dresses. It seems that knit fabrics reign and so it leaves little with one to find those feminine details on dresses anymore.