GrassBase (or GrassBase – The Online World Grass Flora) is a web-based database of grasses, continually maintained and updated by the Royal Botanic Gardens, Kew.[1][2]

Type of site
OwnerRoyal Botanic Gardens, Kew
Created by
  • W.D. Clayton
  • M.S. Vorontsova
  • K.T. Harman
  • H. Williamson

As of 2015, GrassBase was one of the largest (along with GrassWorld) structured datasets for plants.[2] In the January 2016 update, it had morphological descriptions for 11,369 accepted species of grasses and listings for 64,213 botanical names.[3]

Authorship of the database is credited to W. D. Clayton, M. S. Vorontsova, K. T. Harman and H. Williamson.[4]


  1. Harman, Kehan T.; Clayton, W. Derek (1 January 2007). "Recent Developments in Kew's Grass Databases (Grassbase)". Kew Bulletin. 62 (3): 375–379. ISSN 0075-5974. JSTOR 20443365.
  2. Vorontsova, Maria A.; Clayton, Derek; Simon, Bryan K. (2015). "Grassroots e-floras in the Poaceae: Growing GrassBase and GrassWorld". PhytoKeys (48): 73–84. doi:10.3897/phytokeys.48.7159. PMC 4408733. PMID 25941449.
  3. "RBG Kew: GrassBase – the Online World Grass Flora". Retrieved 2018-11-21.
  4. "GrassBase". Royal Botanic Gardens, Kew. Retrieved 18 April 2015.
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