It is a ground orchid with a single, hairy leaf and up to three green flowers with red stripes on the sepals and petals.

Each side of the labellum has between five and eight thin green teeth up to 8 mm long and the tip is curved downwards.

There are four crowded rows of dark red, club-shaped calli up to 2 mm long in the centre of the labellum.

[2][3][4] Caladenia tentaculata was first formally described in 1847 by Diederich von Schlechtendal and the description was published in Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde.

[1][5] The specific epithet (tentaculata) is a Latin word meaning a "feeler" or "holdfast".