Roseville Pottery in Ohio made numerous design lines from 1892 to 1954, including many with floral themes. Their Water Lily line was circa 1943. This Water Lily flower holder #48 - the bottom is open as shown in the photos - so it would not hold water. It would work well to hold floral or greenery that doesn't need water, artificial stems, or just as a decorative piece.
m It has crisp mold definition with a yellow water lily on a green lily pad on the front and a green lily pad on the back on a dark orange/tan background.