If you ever watch a duck float across a pond, gobbling up the vegetation coating the surface, that bird is way ahead of its time. The buoyant greenery is azolla, a tiny fern that grows like crazy, ...

For awhile, it looked as if water in the Cub Run — and even the Occoquan — might be in jeopardy from a strange, red plant that suddenly covered a pond in Centreville. Named azolla caroliniana the ...

Editor’s note: This story was updated Feb. 1 to reflect that no toxicity was found the water. Nature is putting on an uncommon show at Scudder Pond, where the pond’s surface is a bright rusty-pink.

RESIDENTS are alarmed an ugly brown growth covering the entire Marsden Park pond in Park Central could be sewage or a weed. The showpiece pond in Park Central has been smothered with a thick layer of ...