All parts of ericameria cuneata
are hairless. The wedge-shaped leaves are dotted with recessed glands, and have a rounded tip, sometimes with a small spike at the apex. Leaves are held outwards, or are ascending. The stem is much-branched.
Flowerheads are usually single, and they generally have disc florets only; occasionally up to seven ray florets may be present. The yellow disc florets vary in number from seven to 70; corollas are narrow and tubular, with exserted style and stamens. The small phyllaries, up to 60, obovate to lanceolate, are in several series, and may be subtended by up to ten scale-like bracts.
There are three varieties of ericameria cuneata; least widespread is var macrocephala
, of San Diego County, California, which has a large number of disc florets, over 36. The other two have fewer than 33 disc florets - var cuneata
with wedge-shaped, stalkless leaves, and var spathulata
(the most common variety) with spatula-shaped, stalked leaves.