IntroductionIn the quite recent past, during times of war, crop failure or other cases of food shortage, wild food plants have made a substantial addition to the human diet [1,2]. Nowadays, for the vast majority of the population of modern urbanized Europe, wild food plants seem to be of secondary importance as a resource for human nutrition; their gathering requires much more human labour than cultivated crops and vegetables do, their habitats are far from human settlements, and due to the loss of contact with nature, people simply do not know (or cannot recognize) wild plants. Nevertheless, even in Europe there are still many rural locations, where wild food plants are traditionally used on a daily basis. Such locations in southern and Western Europe are much appreciated by researchers in the field of ethnobotany [3][4][5][6][7][8][9][10][11][12][13]. In Northern Europe the research seems to be completed and it seems that not much can be added to it, as in countries with high industrialization and safe social settings the need for wild food is close to zero and the existing ethnographic resources are already thoroughly researched (for a few examples see [14][15][16]).A different situation exists in Eastern Europe within the post-socialist countries. The relatively recent open access to western goods still enables us to remember the use of wild plants on a national level, and research in these areas often gives fruitful results [17,18]. Moreover, some of these countries, like Estonia and its neighbours, have extensive ethnographic collections. While in some of the countries, such as Poland [19][20][21], such resources have been thoroughly analysed, the content of the others is still unknown to the rest of the world, as they are either not used after collection, or their analyses are published in the native languages only. This makes cross-cultural and geographical analysis difficult or even impossible [21].To contribute a small stroke to the pattern of the use of wild plants of Europe from the Estonian side, we need first to review the historical use of wild food plants. The written legacy is rather thin: the few publications in German touching on the use of local species for food in the territory of present-day Estonia were written by Baltic German botanophiles [22][23][24][25][26][27][28][29]. Moreover, they often described Estonia and Livonia [22,23] together, some even including Courland [27,28], and they cover only the period until the mid-19th century. Subsequent times are covered by the memory of respondents to folkloristic and ethnographic surveys, and later discussed by a few enthusiasts in Estonian only -dominantly through popular science publications. Hence, the aim of the study is to critically review all the publications concerning wild edibles covering the period 1770s-1960s. The data collected after 1970 has not yet been reflected in any reliable written source, except for a few of the authors' publications.
AbstractThis paper is a historical ethnobotanical review of wild plants used by the resi...