The table below indicates where and when significant revisions have been made in the web files for the grasses of North America. In general, keys to the genera and species have not been modified, yet.

Mary Barkworth




September 23, 2008 Arctopoa Changed from Poa subg. Arctopoa. Key to species of Poa has not been modified, nor key to genera of Poeae.
September 23, 2008 x Duarctopoa Change in name of x Dupoa to conform with recognition of Arctopoa at the generic level.
August 31, 2008 Luziola Addition of Luziola subintegra
August 31, 2008 Bromus Addition of Bromus squarrosus var. villosus
August 31, 2008 Pappostipa
Jarava speciosa transferred to Pappostipa speciosa and a generic description added. Key to genera has not yet been modified. Appropriate adjustments made to Jarava.
May 9, 2007 Trisetum Trisetum projectum added as a new species
April 18, 2007


Panicum bulbosum is now Zuloagaea bulbosa, and Panicum obtusum is now Hopia obtusa
April 18, 2007 Urochloa Urochloa maxima is now Megathyrsus maximus
November 22, 2006 Brachypodium Brachypodium rupestre added, and several measurement changes made in the treatment
November 22, 2006 Echinochloa Notes re. changed spelling of varietal epithet "macra"
November 20, 2006 Coleanthus and Cynosurus New author for both genera, and changes made to the treatments
November 14, 2006 Posted general bibliography (a compilation of all selected references for FNA 24 and a partial listing for FNA 25) to the web; additional references for FNA 25 are currently being added
August 25, 2006   Posted compilation of all selected references currently in FNA 24 to web.
July, 2006 Miscellaneous Began posting interactive keys to
January 5, 2005 Achnatherum draft Added subspecies for Achnatherum parishii and made adjustments to descriptions and comments for several species.
September 28, 2005 Dasypyrum draft New author (Signe Frederiksen) and revisions to treatment.
July-September, 2005 Poa Substantial modifications to maps based on input from Dr. R.J. Soreng
June 18, 2005 Digitaria Note added to D. longiflora concerning the illustration, which is of D. fulvescens, a species that differs in having glabrous lemmas.
June 14, 2005 Brachiara Genus renamed Moorochloa. See treatment for explanation.
June 14, 2005 Eremopyrum draft New author (Signe Frederiksen) and revisions to treatment.
June 14, 2005 Hierochloë draft Amended version of Hierochloë removed for revision; H. hirta will not be recognized as a distinct species, but as a subspecies of H. odorata.
May 23, 2005 Phragmites Added chromosome numbers, two references, and information about P. australis subsp. americanus.
May 2, 2005 Lagurus draft Added information about awns to generic description.
April 13, 2005 Themeda Added statement that Themeda quadrivalvis is established in Louisiana.
February, 2005 Achnatherum, Glyceria Added color images for some species under illustration button.
February, 2005 Achnatherum Posted preliminary nomenclatural information; initiated glossary.
February, 2005 Coleanthus Added references and more distribution information.
November, 2004 Rytidosperma Added maps for R. caespitosa and R. richardsonii (found as escapes).
November, 2004 Hesperostipa draft Modifications to generic description.
October, 2004; also June 2004 Dissanthelium draft New author (Nancy F. Refulio) substantially revised treatment (2004); Dissanthelium californicum found again in California (2005).
September, 2004 Sporobolus S. coahuilensis added.
mid-2004 Melinis M. nerviglumis added.
late 2003; also fall 2004 Spartina Added comments by J. Reeder (pers. com. 2003); note re. spread of S. alterniflora (2004).
late 2003 Amphicarpum Generic comments added.
mid-2003 Danthonia Note added to D. sericea.