Between seven and twelve short-lived, self-pollinating, whitish to dull pink, resupinate flowers about 3 millimetres (0.12 in) long and wide are arranged on a flowering stem 10–15 millimetres (0.39–0.59 in) long.

[2][3] Small urchin orchid was first formally described in 1955 by Stanley F. Goessling-St Cloud who gave it the name Eria irukandjiana and published the description in The North Queensland Naturalist.

[4][5] In 2002 Mark Clements and David Jones changed the name to Bryobium irukandjianum.

[6] The specific epithet (irukandjianum) refers to the Irukandji people who lived in the area where this orchid grows.

[7] Bryobium irukandjianum mostly grows on the upper branches of trees in humid situations.