The Ecology of Dactylanthus Taylorii and Threats to Its Survival (original) (raw)

Dactylanthus taylorii, a root parasite in the family Balanophoraceae, is New Zealand's only fully parasitic flowering plant. It grows attached to the roots of a wide range of hardwood trees and shrubs, often in fire-induced secondary forest on the margin of podocarp-hardwood forest. It is inconstantly dioecious with a skewed sex ratio of approximately 5:1 male to female inflorescences. The inflorescences, especially the males, contain a large quantity of nectar, up to 1.6 ml, and can produce 0.5 ml per day for 10 days. The morphology of the inflorescences, the quantity and chemistry of the nectar, time-lapse video monitoring and other evidence suggest that the Dactylanthus flowers are adapted for pollination by short-tailed bats. Ship rats are also effective pollinators but occasionally destroy the inflorescences. Kiore completely destroyed all the inflorescences observed on Little Barrier Island in 1992 and 1993, although some seed was found there in 1991. Dactylanthus plants h...