O. hectorii is a deciduous
shrub or small tree, up to tall, with reddish stems, furrowed bark, and oppositely-arranged clusters of 2–4 gray-green leaves, 20–50 mm long by 5–20 mm wide. The undersides of the leaves are covered in a silvery
indumentum. As with most other Asteraceae, the tiny flowers are borne in dense clusters known as
pseudanthia, which are produced on short, hairy
stems from near the leaf
axils. The florets are pale yellow, and enclosed by pale green, densely hairy
phyllaries. The seeds are
cypselae, similar in structure to those of
dandelions, consisting of a 1–2 mm
achene attached to a 3–5 mm feathery
pappus. ==Ecology==