These are plants that look a bit like grasses, but they belong to a different plant family, the Cyperaceae. Most grasses have stems that are round in cross section, while the stems of sedges are triangular in cross-section, thus you can remember the difference with the rhyme "sedges have edges."
Selected sedges links:
© 1997-2006 Healthboard.com.
Healthboard.com is a purely
informational website, and should not be used as a substitute
for professional legal, medical or technical advice.