A quick google search yeilds this discussion with Lou Menzes
http://www.delfinadearaujo.com/on/on23/pages/lou02en.htm
which is on point as to the effect of fire to knock down competing grasses
and thus allow for Phrag vittatum to bloom. She specifically states that
fire is not required for blooming, since the Phrag blooms with or without
fire annually. I believe Marilyn Light notes the same effect (fire ridding
competing grasses) in her long term Cyp study, too.
K Barrett
N Calif, USA
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