1. family Geastraceae a family of earthstar fungi belonging to the order Lycoperdales
  2. family Castoridae beavers
  3. family Calostomataceae a family of fungi belonging to the order Tulostomatales
  4. family Equisetaceae sole surviving family of the Equisetales: fern allies
  5. family Alstroemeriaceae one of many families or subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted; sometimes included in subfamily Amaryllidaceae
  6. family Zosteraceae used in some classifications: essentially equivalent to Potamogetonaceae
  7. family history part of a patient's medical history in which questions are asked in an attempt to find out whether the patient has hereditary tendencies toward particular diseases
  8. family Clathraceae family of fleshy fungi resembling stinkhorns
  9. family Clethraceae coextensive with the genus Clethra
  10. family Cistaceae shrubs or woody herbs of temperate regions especially Mediterranean
  11. family Asteraceae plants with heads composed of many florets: aster
  12. family Guttiferae widely distributed family of chiefly tropical trees and shrubs and vines that produce oils and resins and some usable timber
  13. family Hostaceae one of many families or subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted; includes genus Hosta
  14. family Tulostomaceae stalked puffballs
  15. family Cactaceae constituting the order Opuntiales
  16. family Aulostomidae trumpetfishes
  17. family Catostomidae suckers; closely related to the family Cyprinidae
  18. family Gesneriaceae large family of tropical herbs or shrubs or lianas
  19. family Tulostomataceae stalked puffballs
  20. family Nostocaceae blue-green algae