Thelymitra antennifera is a tuberous, perennial herb, 10–25 cm tall with yellow flowers from July to October.

[3] As with others in the genus, it reproduces by seeds but is unusual in that it is one of the few that develops tubers on the end of stolon-like roots, allowing it to form new colonies.

[6] but was later renamed Thelymitra antennifera by the English botanist Joseph Dalton Hooker in The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror.

Flora Tasmaniae[7] The specific epithet (antennifera) is from the Latin antenna, (classically "a sail yard"), and -fer meaning "-bearing", referring to the lateral appendages on the column.

[8][9] The genus name Macdonaldia, honours "Mrs. Smith, née Macdonald, a lady who has examined the Orchidaceous plants of that island with great care, and from whom a most beautiful series of dried specimens has reached me through the offices of Mr.