Herbs with opposite simple petiolate leaves and capitate flowers surrounded with a finely divided involucre. Perianth funnel-shaped or salver-shaped. Stamens 5. A small genus of North-western American plants. The name is said to be from aBpos elegant, in allusion to the involucre.

1. A, umbellata. - A trailing annual plant with oblong or oval entire leaves on long petioles, and small pedunculate heads of sessile rosy-pink flowers. A native of California.

2. A. arenaria. - An herbaceous perennial with cordate or orbicular entire viscous leaves and capitate yellowish brown flowers. Also from California.