Persoonia myrtilloides, commonly known as myrtle geebung,[2] is a plant in the family Proteaceae and is endemic to New South Wales.

It is an erect to spreading shrub with elliptic to egg-shaped leaves and yellow flowers in groups of up to forty on a rachis up to 170 mm (6.7 in) long.

[10] In 1830, Robert Brown described Persoonia cunninghamii in the supplement to his Prodromus from specimens collected in 1823 near Port Jackson by "D. Cunningham",[11][12] then in 1991, Lawrie Johnson and Peter Weston reduced the species to Persoonia myrtilloides subspecies cunninghamii in the journal Telopea.

Subspecies myrtilloides is associated with trees such as Sydney peppermint (Eucalyptus piperita), narrow-leaved peppermint (E. radiata) and silvertop ash (E. sieberi), and in a shrubby understory of old man banksia (Banksia serrata), Phyllota squarrosa, paperbark teatree (Leptospermum trinervium) and mountain devil (Lambertia formosa).

[13] Currawongs and possibly kangaroos and possums are thought to eat the fruit, the seeds of which are then scattered in droppings.

[13] Insects recorded foraging at flowers of subspecies myrtilloides include members of the genera Exoneura, Hylaeus and Odyneurus, Homalictus holochorus, colletid bees of the genus Leioproctus subgenus Cladocerapis, including Leioproctus carinatifrons, L. raymenti, L. speculiferus and Trigona carbonaria.