On the proper type designation for Camelina microcarpa, a wild relative and possible progenitor of the crop species C. sativa (Brassicaceae)

Abstract Mosyakin, S.L. & J.R. Brock (2021). On the proper type designation for Camelina microcarpa, a wild relative and possible progenitor of the crop species C. sativa (Brassicaceae). In English, English abstract. Candollea 76: 55–63. The proper type designation of the name Camelina microcarpa Andrz. ex DC. (Brassicaceae) is discussed. This taxon is currently considered to be a wild relative and possible progenitor of the oilseed crop Camelina sativa (L.) Crantz, and thus the proper typification of the name C. microcarpa is important for further germplasm research and improvement of the crop species. At present, several (at least four) specimens deposited in herbaria G-DC, KW, and LE, are listed in literature and/or annotated in herbaria or online databases as the type (holotype or lectotype) of C. microcarpa. The original material deposited in G-DC [G00203789] is accepted here as the holotype of C. microcarpa because it appears to be the only original element used by Candolle when preparing his description of the new taxon. Isotypes from the Besser herbarium at the National Herbarium of Ukraine in Kyiv (KW-BESS) are discussed and illustrated. It is concluded that the holotype from G-DC and two well-preserved isotypes from KW-BESS [KW001003103, KW001003104] are sufficient for precise morphology-based application of the name C. microcarpa. Our analysis provided evidence that original material was collected by Andrzejowski no later than 1818 in the Podolian Governorate of the former Russian Empire, most probably in the eastern part of Moldova or adjacent southwestern parts of Ukraine, along the Dnister (Nistru, Dniester) River between the present-day town of Camenca (Kamenka) and the confluence of the Dnister and Yagorlyk (Iagorlîc) rivers, probably on limestone outcrops. It means that the type of C. microcarpa may belong to the southern Ukrainian populations, which are genetically different from northern and central Ukrainian ones; however, further field and molecular studies are needed because more than one genotype may in fact occur in that area. Received: August 7, 2020; Accepted: November 26, 2020; First published online: February 1, 2021