To answer the "how do they survive" question: you said it in the first paragraph, they are parasitic on the parent plant. As to the how does it happen question: I have no clue but I do have a theory. Let me just start by saying that I didn't bother reading the whole article so forgive me if it's already been hypothesized. I've seen white grass before. It grows under boards, under trailers, places where there's enough nutrients in the soil for the seed to germinate but no sunshine for it to develop chlorophyll. I wonder if the same thing doesn't happen to these trees. Do they start buried in a nutrient rich spot and grow in total darkness so they don't develop the chlorophyll that their sunny siblings do? I don't know if a plant would start developing chlorophyll once exposed to the sun, nor do I know what kind of environment they are in, whether that total darkness would happen under a pile of dead leaves or something.... Just a thought.
Sent from my iPhone using
MonsterAquariaNetwork app