This species is in the sub-genus Rea.
A population of D. pruinata on Morro Spartan (a rock off the coast of Masatierra - the main island) is the largest population known of this species. There are only 20 individuals in this population.
The plant is a sea-spray tolerant, rosette tree inhabiting very poor, rocky soils. It bears white flowers with some nectar and a slight odor. It is probably a tetraploid (n=18) and is also likely semi-self compatible.
data regenerated on Wed, 16 Jan 2019 13:45:55 -0500 [bcm v4.0]