Q
- QuaranjavirusQuaranjavirus is a genus of enveloped RNA viruses, one of seven genera in the virus family
- Quercus acutissimaSpecies of oak tree
- Quercus albaSpecies of oak tree
- Quercus macrocarpaSpecies of oak tree
- Quercus phellosQuercus phellos, the willow oak, is a North American species of a deciduous tree in the re
- Quercus roburSpecies of flowering plant
- Quercus rubraSpecies of flowering plant in the beech and oak family
- Quercus suberSpecies of tree
- Quercus subg. CerrisQuercus subgenus Cerris is one of the two subgenera into which the genus Quercus was divid
- Quercus velutinaSpecies of oak tree
- Quercus virginianaSpecies of oak tree
- QuinceFlowering plant and fruit