Cultural Importance Indices: A Comparative Analysis Based on the Useful Wild Plants of Southern Cantabria (Northern Spain). This paper compares four indices based on informant consensus. Each index aims to assess the cultural significance of plant species and is suitable for statistical testing of different hypotheses. For the comparison, we used data concerning plants traditionally used in the Campoo area of southern Cantabria in northern Spain. Our results show a positive and significant correlation between the number of uses (NU) and the frequency of citation (FC) of the species. It seems to be a general rule that the more versatile a plant, the more widespread its usefulness. In addition, NU is highly influenced by the number of use-categories in the study. Consequently, an objective index must rely on FC more than NU. We propose the use of the cultural importance index (CI), which is defined as the summation of the informants' proportions that mention each of the uses of the species. The CI index is highly correlated with FC and, although it also considers diversity of use, each usecategory is conveniently weighted by the number of informants mentioning it. Despite the use of cultural significance indices being questioned, we believe that indices based on in-depth, semi-structured interviews are still very useful for compilation studies of passive knowledge, such as most ethnobotanical works conducted in the last three decades in Europe.

This paper compiles and evaluates the ethnobotanical data currently available on wild plants traditionally used for human consumption in Spain. Forty-six ethnobotanical and ethnographical sources from Spain were reviewed, together with some original unpublished field data from several Spanish provinces. A total of 419 plant species belonging to 67 families was recorded. A list of species, plant parts used, localization and method of consumption, and harvesting time is presented. Of the seven different food categories considered, green vegetables were the largest group, followed by plants used to prepare beverages, wild fruits, and plants used for seasoning, sweets, preservatives, and other uses. Important species according to the number of reports include: Foeniculum vulgare , Rorippa nasturtium-aquaticum , Origanum vulgare , Rubus ulmifolius , Silene vulgaris , Asparagus acutifolius , and Scolymus hispanicus . We studied data on the botanical families to which the plants in the different categories belonged, overlapping between groups and distribution of uses of the different species. Many wild food plants have also been used for medicinal purposes and some are considered to be poisonous. This review highlights the rich traditional knowledge on edible plants that has remained in rural Spain. Until recently, many wild plants were used as dietary supplements. However, most of this knowledge survives only in the memory of the elderly, and will probably disappear in a few decades.

IntroductionIn several countries and regions of Europe ethnobotanical studies and reviews give us a picture of traditionally used wild food plants (e.g. Poland [1][2][3][4][5][6][7][8], Spain [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], Portugal [26,27], Italy [28][29][30][31][32][33][34][35][36][37], Greece [38,39], France [40], , the whole Mediterranean area [42][43][44], Austria [45][46][47], Slovakia [48] and the Nordic countries [49,50]).Plant use patterns are usually not static. In many cases ethnobotanical studies reveal either a dramatic or gradual loss of traditional knowledge and practices (e.g. [3,50,51]). The changes in patterns of wild plant use differ by region and are associated with lifestyle changes, urbanization, large-scale farming, lesser contact with nature and many other reasons. Moreover, times of famine seem to be in the distant past for industrially developed countries. Food made of cultivated plants and bought from the supermarket appears on the table with relatively little effort, while collecting wild species is more time consuming and season-dependent. In spite of that, the importance of wild food plants for food security and in shaping alternative models of consumption is emphasized [52]. Wild food plants cannot be considered "famine food" only, as many of them were and still are used on several other occasions as well (cf. [53]). Moreover, in Europe there are new phenomena associated with plant use appearing in modern societies. Some of them have to do with migration and new ethnic minorities appearing in cities and bringing new traditions with them. Other phenomena appear due to new trends in nutrition and self-medication facilitated by the instantaneous spread of information via the Internet. On top of that not all the traditions are gone, in some areas for a variety of reasons old traditions are cultivated while in others, they are lost.In this review we would like to give an overall picture of what is happening to the traditional use of wild food plants in different parts of Europe at the dawn of the 21st century. What are wild food plants?The term "wild" refers to those plants that grow without being cultivated. It mostly includes native species growing in their natural habitat, but sometimes managed, as well as introduced species that have been naturalized [15].Apart from that, a large number of other species are perceived as "wild" and labelled in this way, sometimes for marketing purposes (positive term) or as a negative term (as AbstractThe aim of this review is to present an overview of changes in the contemporary use of wild food plants in Europe, mainly using the examples of our home countries: Poland, Italy, Spain, Estonia and Sweden. We set the scene referring to the nutrition of 19th century peasants, involving many famine and emergency foods. Later we discuss such issues as children's wild snacks, the association between the decline of plant knowledge and the disappearance of plant use, the effects of over-exploitation, the decrease of t...

Background: We compare traditional knowledge and use of wild edible plants in six rural regions of the northwest of the Iberian Peninsula as follows: Campoo, Picos de Europa, Piloña, Sanabria and Caurel in Spain and Parque Natural de Montesinho in Portugal.

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