The petals are a cream to yellowish, egg-shaped, erect and dished, about 3 mm (0.1 in) long and their edges are covered with short hairs.

[2] Verticordia longistylis was first formally described by Alex George in 1991 from a specimen he collected in the Fitzgerald River National Park and the description was published in Nuytsia.

[1][3] George derived the specific epithet (longistylis) "from the Latin longus (long) and stylus; the style is the longest in the genus".

[3] This verticordia grows on exposed spongolite in the Fitzgerald River National Park in the Esperance Plains biogeographic region.

[2][4][5] Verticordia longistylis is classified as "Priority Three" by the Western Australian Government Department of Parks and Wildlife,[4] meaning that it is poorly known and known from only a few locations but is not under imminent threat.