**Group 1: Naming of Cultigens**
– Cultigens named under International Code of Nomenclature for Cultivated Plants (ICNCP).
– ICNCP does not recognize trade designations as scientifically acceptable names.
– Not all cultigens named under Cultivated Plant Code.
– Cultigen does not necessarily have species name.
– Cultigens have names at various ranks.
**Group 2: Cultivars and Cultigens**
– Cultigen definition allows recognition of cultivars.
– Cultigen and cultivar are not synonymous.
– Cultigens exist at the rank of species only.
– Cultivar defined as a race subordinate to species in 1923.
– Cultigen includes hybrids and cultivars.
**Group 3: Usage of Cultigens**
– In botany, cultigen denotes plants like bread wheat of unknown origin.
– Cultigens may not have species names or biological characteristics of species.
– Cultigens maintained as entities solely by continued propagation.
– Cultigen includes genetically modified plants.
– Cultigens have various names and ranks.
**Group 4: International Codes and Guidelines**
– International Code of Nomenclature for Plants ensures standardized naming practices for plants globally.
– International Code of Nomenclature for Cultivated Plants provides rules and recommendations for naming plants in cultivation.
– Article 10 and Appendix 10 of the Cultivated Plant Code contain crucial guidelines for naming cultivated plants.
– The distinction between cultivar and cultigen is important in botanical nomenclature.
– The term ‘grex’ was introduced in the 2009 Cultivated Plant Code for orchids.
**Group 5: Historical Development and Additional Resources**
– Key figures like L. H. Bailey and Alan G. Morton have made significant contributions to botanical science.
– Manuals like ‘Manual of Cultivated Plants’ and ‘Hortus Second’ have been instrumental in plant identification.
– Historical documents such as ’50 years of the International Code of Nomenclature for Cultivated Plants’ offer valuable perspectives.
– ‘Plant Names: A Guide to Botanical Nomenclature’ provides comprehensive information on plant naming.
– International Society for Horticultural Science provides links to relevant botanical codes and cultivar registration authorities.
A cultigen (from Latin cultus 'cultivated', and gens 'kind'), or cultivated plant, is a plant that has been deliberately altered or selected by humans, either from genetic modification, from graft-chimaeras, plant breeding, or wild or cultivated plant selection. These plants have commercial value in horticulture, agriculture or forestry. Plants meeting this definition remain cultigens whether they are naturalised, deliberately planted in the wild, or grown in cultivation.