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Keys
  • Vascular plant groups
  • Club mosses
  • Ferns
  • Vegetative key to families
  • Gymnosperms
  • Flowering plants
  • Genera
  • Families

Cyperaceae

Leaf sheath closed or rarely open and then the perianth reduced to bristles or minute scales Cyperaceae
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Flowers bisexual or unisexual but never enclosed in a utricle and never apparently separated into unisexual spikelets
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Spikelets with 1–2 perfect flowers, other flowers male or sterile
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Perianth scales or bristles present
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Perianth scales or bristles absent