These three patterns are all by unknown makers. Curious that they each have roses as a theme.
A Dozen Roses
A rare pattern, it has 12 small roses within curved panels. The back has a modified wide-panel design with three small feet (similar to those on Imperial's Floral and Optic pattern). The maker is unknown. Found mostly in amethyst with only a few green bowls reported.
Rose Pinwheel
A mysterious pattern that few collectors ever see. The pattern of these 9-inch bowls has five roses around the edge with swirled ribs reaching into the center. Known in marigold and amethyst with green being the rarest color.

The photo on the left is an amethyst example. Rose Pinwheel is also known in green.

The maker is not known.

Roses and Greek Key
This an exotic squarish plate, about 10 1/4 inches from tip to tip. Only a few examples are khown. The pattern has four groups of heavily sculpted roses covering the outer portions of the front. The center has bands with the greek key design interspersed with bands of small flowers. These bands are repeated on the back. The maker is unknown. The one on the left is marigold and is in a private collection. An example with a smokey amberish iridescence is also known.