Georgia O Keeffe meets Cold Mountain for the Park Avenue set? That would be one way to describe Rachel Roy s Fall collection. Before her show, the designer said she was interested in the intersection between Native American and Colonial styles, but brought up-to-date for the women of today. It was a tricky proposition, though for the most part Roy pulled it off. If the geometric black-on-gray jacquard used for a tulip skirt and a belted blanket cardigan that topped a tuxedo shirt came off somewhat heavy-handed, there were plenty of other pieces that finessed the conceit in a more subtle way. Take, for instance, a black wool suit with an extra-long jacket worn with a flounced white silk blouse, or a pumpkin silk sleeveless dress with a bow at the waist and a statement necklace of feathers and beads. Here Roy caught that mix of rawness and polish she was looking for.