The bright green leaves of sphaeromeria diversifolia
grow mostly along the stem rather than at the base, at regular intervals, staying similar in size all the way to the top. They are narrow and linear, with a slightly raised midvein, and are usually entire, though they may have a few irregular lobes, or teeth. Leaves and stems are hairless.
The inflorescence is a compact cluster of up to 20 heads, at the top of the stem, around 2 inches in diameter. Flowerheads are attached by sparsely hairy pedicels, half an inch long; they have between 8 and 12 green phyllaries, also usually sparsely hairy, below 30 to 50 yellow, cylindrical, hairless, five-lobed disc florets.