It is an evergreen species which grows in clumps in sandstone cracks and has bright green leaves and in late spring, produces arching flower stems with up to eighteen dull greenish flowers with reddish or brown markings.

Rimacola elliptica is an evergreen perennial herb with a short, branched, erect stem but which lacks a tuber.

[2][3][4] The green rock orchid was first formally described in 1810 by Robert Brown who gave it the name Lyperanthus ellipticus and published the description in Prodromus Florae Novae Hollandiae et Insulae Van Diemen.

[8][9]: 217  The specific epithet (ellipticus) is derived from the Latin word ellipsis meaning "elliptical".

[9]: 346 Rimacola elliptica is mainly found in the Blue Mountains by also occurs disjunctly near Fitzroy Falls and near the coast north of Sydney.