Mastixia rostrata subsp. caudatifolia is a subspecies of Mastixia rostrata. It is a tree in the family Nyssaceae. The infraspecific epithet Latin: caudatifolia is from the Latin meaning 'tapered leaf'.
Mastixia rostrata subsp. caudatifolia grows as a tree measuring up to 30m (100feet) tall with a trunk diameter of up to 50cm (20inches). The generally smooth bark is greyish to brown. The flowers are green-yellow. The ovoid to oblong fruits measure up to 2.20NaN0 long.
Mastixia rostrata subsp. caudatifolia grows naturally in Sumatra, Peninsular Malaysia and Borneo. Its habitat is mixed dipterocarp forest from sea-level to 1600m (5,200feet) altitude.