Caladenia necrophylla is a terrestrial, perennial, deciduous, herb with an underground tuber.

The sepals and petals have light brown club-like glandular tips 5–20 mm (0.2–0.8 in) long.

There are four crowded rows of dark red calli up to 1.5 mm (0.06 in) longin the centre of the labellum.

[2][3] Caladenia necrophylla was first described in 1991 by David Jones from a specimen collected near Robe and the description was published in Australian Orchid Research.

[1] The specific epithet (necrophylla) is derived from the Ancient Greek words nekros meaning "a dead body"[4]: 255  and phyllon meaning "a leaf",[4]: 466  referring to the leaf withering before the flower opens.