Polyalthia submontana is a species of plants in the custard apple family Annonaceae. It is endemic to the rainforests of northeast Queensland, Australia. It is a shrub to about tall, first described (as Haplostichanthus submontanus) in 2007 and transferred to its current name in 2012. In 2017 botanist Laurence W. Jessup described the subspecies Polyalthia submontana subsp. sessiliflora.
Two subspecies are recognised:
Polyalthia submontana subsp. sessiliflora â Restricted to the Atherton Tableland. Conservation status is least concern.
Polyalthia submontana subsp. submontana â Scattered populations in the area around Rossville, and from Cape Tribulation to Mossman. Conservation status is near threatened.