Local plant knowledge and its variation among farmer's families in the Napf region, Switzerland.

BACKGROUND: Local plant knowledge typically is unevenly distributed within a community. This knowledge variation is important in understanding people's relationship with their environment. Here we ask about knowledge variation among farmers' families in the Napf region of Switzerland. METHODS: In 2008 and 2009, 60 adults and children living on 14 farms were interviewed about known and used plant species, and the data analyzed for knowledge variation. The farms were chosen by random stratified sampling, and freelisting and semi-structured interviews were conducted individually in the local idiom. The data were organized in an access database and analyzed with descriptive statistics, correlations, Mann-Whitney U tests and cultural domain analysis. RESULTS: Totally, 456 folk taxa were listed, whereas frequently listed species are common meadow and forest species. Uses were indicated for 391 taxa, most of them culinary, followed by fodder, wood, medicinal and ornamental uses. Local plant knowledge correlates with age and gender. Due to professional specialization, adults above 20 years have broader plant knowledge than children and adolescents. This is true for almost all examined habitat and plant use categories except for toy uses. Women and men share a common body of plant knowledge especially about herbaceous grassland species and woody species. Specialized knowledge of men is linked to cattle fodder and the processing of wood, specialized knowledge of women concerns edible, medicinal and ornamental plants, often garden species, but also herbaceous forest species. CONCLUSION: In a rural region like the Napf, people retain a solid basis of plant knowledge. The variation of plant knowledge within farmers' families of this region reflects sociocultural patterns. As these patterns are changing and as (agro)biodiversity is declining, local plant knowledge in the Napf region is suspected to undergo a mainstreaming process.

Folkbotanical classification: morphological, ecological and utilitarian characterization of plants in the Napf region, Switzerland.

BACKGROUND: Discussions surrounding ethnobiological classification have been broad and diverse. One of the recurring questions is whether classification is mainly based on the "inherent structure of biological reality" or on cultural, especially utilitarian needs. So far, studies about ethnobotanical classification have mainly been done in indigenous societies. Comparable data from industrialized countries are scarce. In this paper, folkbotanical classification data from the Napf region in central Switzerland is analysed and cross-culturally compared. METHODS: Structured and semi-structured interviews were conducted with 60 adults and children chosen by random sampling. Descriptive statistics, t-tests and cultural domain analysis were used to analyze the data. RESULTS: Close to 500 folk taxa have been documented during field work. As life-form taxa appeared tree, bush, grass, herb, flower, and mushroom. Intermediate taxa mentioned regularly were sub-categories of the life form tree and bush, i.e. conifer, deciduous tree, fruit tree, stone fruits, pomaceous fruits, and berry bush. The rank of the folk generic was by far the largest with 316 taxa (85.4% monotypical). The specific rank contained 145 taxa, the varietal 14 taxa. The 475 generic, specific and varietal folk taxa could be assigned to 298 wild growing plant species, which make up 28.13% of the local flora, and to 213 cultivated plant species, subspecies and cultivars. Morphology, mainly life-form, fruits, leaves, and flowers, was the most important criterion for classifying plants. Other important criteria were their use (mainly edibility) and habitat (mainly meadow, forest and garden). The three criteria emerged spontaneously out of open questioning. CONCLUSION: The classification system of the Napf region is comparable to classification systems of indigenous societies, both in its shallow hierarchical structure and in the amount of recognized taxa. The classification of plants was mainly guided by morphology, habitat and use. The three aspects seem to be mutually linked for certain plant groups, which results in always the same groups, independent from the different sorting criteria. Sensory perception allows for a broader explanation of the known coincidence of morphology and use groups.