Geospatial analysis of pollen records from the Yucatán peninsula, Mexico Alicia Carrillo-BastosGerald A. IslebeNuria Torrescano-Valle Original Article 24 February 2012 Pages: 429 - 437
Floristic diversity in the transition from traditional to modern land-use in southern Sweden a.d. 1800–2008 Daniel FredhAnna BroströmPer Lagerås Original Article Open access 11 April 2012 Pages: 439 - 452
Long-term development of a cultural landscape: the origins and dynamics of lowland heathland in southern England Jon A. GrovesMartyn P. WallerJ. Edward Schofield Original Article 06 September 2012 Pages: 453 - 470
Evaluating the effect of flowering age and forest structure on pollen productivity estimates Isabelle MatthiasAnne Birgitte NielsenThomas Giesecke Original Article Open access 10 October 2012 Pages: 471 - 484
Integrated archaeobotanical research into vegetation management and land use in El Llano de la Horca (Santorcaz, Madrid, central Spain) Paloma UzquianoCosimo D’OronzoEnrique Baquedano Original Article 21 December 2011 Pages: 485 - 498
A short history of Lagenaria siceraria (bottle gourd) in the Roman provinces: morphotypes and archaeogenetics Angela SchlumbaumPatricia Vandorpe Original Article 27 December 2011 Pages: 499 - 509
List of critical referees, Volumes 20–21 ACKNOWLEDGEMENT TO REFEREES 13 October 2012 Pages: 511 - 512