whats pleurococcus

[TOM FOLEY]

As part of a project that i'm doing i need to investigate pleurococcus
growing on trees and discus the patterns i find. for example although it
contains chlorophyll it grows in the shade and and is rarly found in
direct sunlight. why? 
        i now that it is a protist life form and that it is a form of
algae but beyond this i don't know much about it.
        i would apreaciate it if someone could tell me something about
it or even tell me a web site that is worth visiting.

thanx



-- 
TOM FOLEY