Use classes adopted to define the economic importance of the taxa. The definitions follow the standards proposed by Wiersama & Leόn (1999).
Use class Explanation
Food This class includes plants consumed by humans as major crop constituents of food preparation, and clearly comprises the most important class economically.
Drink It includes plants used as constituent of beverage. In GRIN taxonomy are considered as Food subclass.
Fodder This class includes animal food: plant material harvested and fed to domestic animals and plant material upon which domestic animals feed themselves.
Food additive Taxa used as minor constituent of food preparations.
Honey production Plants important for honey production.
Environmental Many valuable economic plant are classified here including use for erosion control, soil improvement and agroforestry.
Ornamental This category includes taxa used by humans for their aesthetic or functional value within gardens or cities. In GRIN taxonomy are considered as a Environmental subclass.
Material This class includes a number of important economic plants, such as those which furnish fiber, timber, gums, resins and industrial or essential oil.
Fuel Category including the more traditional source of fuel, plants with potential to provide biomass for electricity generation are rapidly growing.
Medicine It includes plants that serve as source of specific pharmaceutical agents and those that are widely  used.
Folk medicine It includes plants used as folklore remedies. In GRIN taxonomy are considered as a Medicine subclass.
Poison The economic impact of the poisonous plants classified here is largely negative. they are seldom traded commercially and have been treated only superficially. Nearly all plants recorded here are toxic to humans and livestock.
Social This minor use class includes few plants of widespread economic importance, although tobacco and those which provide illicit drugs are of considerable economic impact.
Gene source In addition to known or potential sources of beneficial genes for specific improvements in crop plants, numerous species can be successfully crossed with crop species to provide fertile progeny and thus must be considered important as genetic resource plants. A few species important as models for research in plant biology are included in this category.
Ethnobotanical This category includes plants that have ethnobotanical uses.
Red List Categories    
ORSENIGO et al. 2020; ORSENIGO et al. 2018; ROSSI et al. 2016 IUCN Red List of Threatened Species (version 3.1)    
RE Regionally Extinct EX Extinct    
CR(PE) Critically Endangered (Possibly Extinct) EW Extinct in the Wild    
CR Critically Endangered CR Critically Endangered    
EN Endangered EN Endangered    
VU Vulnerable VU Vulnerable    
NT Near Threatened NT Near Threatened    
LC Least Concern LC Least Concern    
DD Data Deficient DD Data Deficient    
    NE Not Evaluated    
Code Explanation
A The taxon is a relative to a crop with high value according with the ITPGRFA or ISTAT and it is considered priority for conservation because already included in at least one list of endangered taxa. The taxa in this category need of specific protection measures.
B The taxon is a relative to a crop with high value according with the ITPGRFA or ISTAT and it is considered priority for its endemicity restricted to whole of the Italian territory or only to a part of Italy. The taxa in this category not necessarily require specific protection measure but require monitoring because of their restricted distribution.
C The taxon is native and relative to a crop with high value according with the ITPGRFA or ISTAT. The taxon is neither included in any list of  threatened taxa nor endemic. The taxa in this category do not need any specific protection measures.
GP Gene Pool, based upon the Harlan and de Wet gene pool concept (1971)
GP1A cultivated crop taxa.
GP1B (primary GP): wild or weedy forms of the crop that cross easily with assign each CWR to the appropriate sublevel based upon crossability data the crop.
GP2 (secondary GP): less closely related species from which gene transfer to the crop is possible but difficult using conventional breeding techniques.
GP3 (tertiary GP): species from which gene transfer to the crop is impossible, or if possible, requires sophisticated techniques, such as
embryo rescue, somatic fusion or genetic engineering.
TG The taxon group concept employs taxonomic hierarchy as a proxy for taxon genetic relatedness and thus crossability (Maxted et al. 2006)
TG1A cultivated crop taxa
TG1B taxa within the same species as the crop
TG2 taxa within the same series or section as the crop
TG3 taxa within the same subgenus as the crop
TG4 taxa within the same genus as the crop
TG5 taxa within the same tribe as the crop


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