{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T10:04:55Z","timestamp":1776852295411,"version":"3.51.2"},"reference-count":64,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2024,5,8]],"date-time":"2024-05-08T00:00:00Z","timestamp":1715126400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Helsinki"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Plants"],"abstract":"<jats:p>The taxonomic history, nomenclature and application of the oldest species names available for the common hybrids between Pilosella caespitosa and P. lactucella are reviewed. Elias Fries created a nomenclatural and bibliographical collision when he replaced a printed label of his exsiccata Herbarium normale with its second version, distributed at a later date, in which the protologue of Hieracium suecicum had appeared. In this protologue, the new species name was validly published with a mere reference to the original description of H. auricula var. majus, thus being based on the type of the latter. In a later fascicle of the same exsiccata, Fries excluded this synonym and distributed a different morphotype of H. suecicum, which caused taxonomic confusion and re-description of the same taxon under the name H. fennicum. The surviving original material of H. auricula var. majus is rejected, and its neotype is designated, making H. suecicum the correct name for the hybrids strictly intermediate between P. lactucella and P. caespitosa. Such hybrids constitute the most common hybridogenous taxon of Pilosella in Scandinavia, Finland and neighbouring Russia, with many synonyms described from this area and partly typified here. Another hybridogenous taxon of the same origin, more similar to P. lactucella and previously known as P. cochlearis, is correctly named P. stipitiflora comb. nov. The nomenclatural value and bibliographic complexity of exsiccata, a commonly underestimated kind of grey literature in taxonomic botany, are further highlighted.<\/jats:p>","DOI":"10.3390\/plants13101301","type":"journal-article","created":{"date-parts":[[2024,5,8]],"date-time":"2024-05-08T12:27:11Z","timestamp":1715171231000},"page":"1301","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Taxonomic Circumscription and Nomenclatural History of Pilosella suecica (Asteraceae): A Special Case of Grey Literature in Taxonomic Botany"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6664-7657","authenticated-orcid":false,"given":"Alexander N.","family":"Sennikov","sequence":"first","affiliation":[{"name":"Botanical Museum, Finnish Museum of Natural History, University of Helsinki, 00014 Helsinki, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,8]]},"reference":[{"key":"ref_1","first-page":"231","article-title":"The role of hybridization in evolution","volume":"103","author":"Stebbins","year":"1959","journal-title":"Proc. Am. Philos. Soc."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1017\/S1477200007002381","article-title":"Plant evolution by means of hybridization","volume":"5","author":"Wissemann","year":"2007","journal-title":"Syst. Biodivers."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"743","DOI":"10.1111\/tpj.16142","article-title":"Deep reticulation: The long legacy of hybridization in vascular plant evolution","volume":"114","author":"Stull","year":"2023","journal-title":"Plant J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1093\/aob\/mcx079","article-title":"Polyploidy and interspecific hybridization: Partners for adaptation, speciation and evolution in plants","volume":"120","author":"Alix","year":"2017","journal-title":"Ann. Bot."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"5549","DOI":"10.1007\/s11033-020-05597-y","article-title":"The effects of hybridization and genome doubling in plant evolution via allopolyploidy","volume":"47","author":"Qiu","year":"2020","journal-title":"Mol. Biol. Rep."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Harrison, R.G. (1993). Hybrid Zones and the Evolutionary Process, Oxford University Press.","DOI":"10.1093\/oso\/9780195069174.001.0001"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Suarez-Gonzalez, A., Lexer, C., and Cronk, Q.C.B. (2018). Adaptive introgression: A plant perspective. Biol. Lett., 14.","DOI":"10.1098\/rsbl.2017.0688"},{"key":"ref_8","first-page":"319","article-title":"Variation in Hieracium subgen","volume":"35","author":"Krahulec","year":"2000","journal-title":"Pilosella (Asteraceae): What do we know about its sources? Folia Geobot."},{"key":"ref_9","unstructured":"H\u00f6randl, E., Grossniklaus, U., van Dijk, P., and Sharbel, T. (2007). Apomixis: Evolution, Mechanisms and Perspectives, Koeltz Scientific Books."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1007\/s12224-013-9179-8","article-title":"Hybridization within a Pilosella population: A morphometric analysis","volume":"49","author":"Urfus","year":"2014","journal-title":"Folia Geobot."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"345","DOI":"10.3372\/wi.48.48302","article-title":"Impact of interspecific hybridization within a polyploid agamic complex of Pilosella (Asteraceae, Cichorieae) in Bulgaria compared with Central Europe","volume":"48","author":"Krahulec","year":"2018","journal-title":"Willdenowia"},{"key":"ref_12","first-page":"1","article-title":"The structure of the agamic complex of Hieracium subgen. Pilosella in the \u0160umava Mts and its comparison with other regions in Central Europe","volume":"80","author":"Krahulec","year":"2008","journal-title":"Preslia"},{"key":"ref_13","first-page":"471","article-title":"Production of polyhaploids by facultatively apomictic Pilosella can result in formation of new genotypes via genome doubling","volume":"83","author":"Krahulec","year":"2011","journal-title":"Preslia"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"167","DOI":"10.23855\/preslia.2020.167","article-title":"Populations of Pilosella species in ruderal habitats in the city of Prague: Consequences of the spread of P. aurantiaca and P. rothiana","volume":"92","author":"Krahulec","year":"2020","journal-title":"Preslia"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"403","DOI":"10.23855\/preslia.2020.403","article-title":"Residual sexuality of the apomict Pilosella rubra under natural conditions in the Krkono\u0161e Mts","volume":"92","author":"Urfus","year":"2020","journal-title":"Preslia"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1145","DOI":"10.3732\/ajb.1400466","article-title":"Morphology delimits more species than molecular genetic clusters of invasive Pilosella","volume":"102","author":"Moffat","year":"2015","journal-title":"Am. J. Bot."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"880","DOI":"10.1002\/tax.12533","article-title":"Typification of fourteen Linnaean names in the genus Hieracium (Compositae)","volume":"70","year":"2021","journal-title":"Taxon"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"25","DOI":"10.21248\/kochia.v7.76","article-title":"Hieracium fallax\u2014Verabschiedung eines vertrauten Namens","volume":"7","author":"Gottschlich","year":"2013","journal-title":"Kochia"},{"key":"ref_19","first-page":"1","article-title":"Synopse der f\u00fcr Deutschland nachgewiesenen Arten und Unterarten der Gattung Hieracium s.l. (Hieracium s.str. und Pilosella), aufgeschl\u00fcsselt nach Vorkommen in den einzelnen Bundesl\u00e4ndern","volume":"9","author":"Gottschlich","year":"2020","journal-title":"Forum Geobot."},{"key":"ref_20","first-page":"1147","article-title":"Compositae\u2013Hieracium. Sect. Pilosellina\u2013Praealtina","volume":"Volume 82","author":"Engler","year":"1923","journal-title":"Das Pflanzenreich"},{"key":"ref_21","first-page":"1","article-title":"Hieracium L.","volume":"Volume 30","author":"Schischkin","year":"1960","journal-title":"Flora of the USSR"},{"key":"ref_22","first-page":"300","article-title":"Pilosella Hill","volume":"Volume 8","author":"Tzvelev","year":"1989","journal-title":"Flora of the European Part of the USSR"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"123","DOI":"10.3372\/wi.37.37106","article-title":"A new treatment of Pilosella for the Euro-Mediterranean flora [Notulae ad floram euro-mediterraneam pertinentes 24]","volume":"37","author":"Greuter","year":"2007","journal-title":"Willdenowia"},{"key":"ref_24","first-page":"195","article-title":"Pilosella sphaerocephala (Rchb.) F. W. Schultz & Sch. Bip. [Med-Checklist Notulae, 29]","volume":"40","author":"Gottschlich","year":"2010","journal-title":"Willdenowia"},{"key":"ref_25","unstructured":"Sennikov, A.N. (2024). The taxonomic history of Pilosella floribunda (Asteraceae), a common hybridogenous aggregate of Central, Northern and Eastern Europe. Nord. J. Bot., submitted."},{"key":"ref_26","unstructured":"Sukhorukov, A.N. (2010). The Identification Manual of Vascular Plants of the Tambov Region, Grif and Co."},{"key":"ref_27","first-page":"312","article-title":"Nyheter bland svenska st\u00e5ngfibblor","volume":"111","author":"Tyler","year":"2017","journal-title":"Svensk Bot. Tidskr."},{"key":"ref_28","unstructured":"Greuter, W., and von Raab-Straube, E. Compositae. Euro+Med Plantbase\u2014The Information Resource for Euro-Mediterranean Plant Diversity, 2007\u20132009, Freie Universit\u00e4t Berlin. Available online: http:\/\/ww2.bgbm.org\/EuroPlusMed\/."},{"key":"ref_29","unstructured":"H\u00e4met-Ahti, L., Suominen, J., Ulvinen, T., and Uotila, P. (1998). Retkeilykasvio (Field Flora of Finland), Finnish Museum of Natural History. [4th ed.]."},{"key":"ref_30","first-page":"85","article-title":"Pilosella Hill","volume":"Volume 3","author":"Kuusk","year":"2003","journal-title":"Flora of the Baltic Countries. Compendium of Vascular Plants"},{"key":"ref_31","first-page":"1","article-title":"Bibliographic catalogue of Hieracium and Pilosella names published by Finnish authors","volume":"9","author":"Sennikov","year":"2002","journal-title":"Norrlinia"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Triebel, D., Uribe-Holguin, C., Seifert, S., Weiss, M., and Scholz, P. (2022). Connecting IndExs editors and exsiccata IDs with Wikidata for disambiguation of people names and work in botanical and mycological collections. Biodivers. Inf. Sci. Stand., 6.","DOI":"10.3897\/biss.6.93585"},{"key":"ref_33","first-page":"358","article-title":"Hieracium L. (incl. Pilosella Hill)","volume":"Volume 4","author":"Tutin","year":"1976","journal-title":"Flora Europaea"},{"key":"ref_34","unstructured":"Von N\u00e4geli, C.W., and Peter, A. (1885). Die Hieracien Mittel-Europas, Verlag von R. Oldenbourg."},{"key":"ref_35","unstructured":"Fries, E.M. (1848). Symbolae ad Historiam Hieraciorum, Leffler & Sebell."},{"key":"ref_36","unstructured":"Fries, E.M. (1862). Epicrisis Generis Hieraciorum, Uppsala Universitets Arsskrift."},{"key":"ref_37","unstructured":"Kravchenko, A.V. (2007). A Compendium of Karelian Flora (Vascular Plants), Karelian Scientific Centre of the Russian Academy of Sciences."},{"key":"ref_38","unstructured":"Tupitzina, N.N. (2004). The Hawkweeds of Siberia, Science Publishers."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1139\/b05-149","article-title":"A new invasive hawkweed, Hieracium glomeratum (Lactuceae, Asteraceae), in the Pacific Northwest","volume":"84","author":"Wilson","year":"2006","journal-title":"Can. J. Bot."},{"key":"ref_40","unstructured":"Fries, E.M. (1843). Herbarium Normale Plantarum Rariorum et Criticarum Sueciae, Wahlsr\u00f6m & L\u00e5stbom. nos. 1\u2013100."},{"key":"ref_41","unstructured":"Fries, E.M. (1843\u20131845). Herbarium Normale Plantarum Rariorum et Criticarum Sueciae, Wahlsr\u00f6m & L\u00e5stbom. [2nd ed.]. no. 7."},{"key":"ref_42","unstructured":"Wahlenberg, G. (1820). Flora Upsaliensis Enumerans Plantas Circa Upsaliam Sponte Crescentes, Typographorum. Typis et impensis R. Acad."},{"key":"ref_43","unstructured":"Wahlenberg, G. (1826). Flora Suecica, Palmblad & C."},{"key":"ref_44","unstructured":"Wahlenberg, G. (1833). Flora Suecica, Palmblad & C. [2nd ed.]."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., and Marhold, K. (2018). International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code): Adopted by the Nineteenth International Botanical Congress, Shenzhen, China, July 2017, Koeltz Botanical Books.","DOI":"10.12705\/Code.2018"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Puel, T. (1852). Catalogue des Plantes qui Croissent dans le D\u00e9partement du Lot, J.-P. Combarieu.","DOI":"10.5962\/bhl.title.12052"},{"key":"ref_47","unstructured":"Fries, E.M. (1845). Summa Vegetabilium Scandinaviae, E Typographia Academica."},{"key":"ref_48","first-page":"185","article-title":"Commentatio de distributione Hieracii generis per Europam geographica (cont.)","volume":"38","author":"Grisebach","year":"1854","journal-title":"Gelehrte Anzeigen"},{"key":"ref_49","unstructured":"Fries, E.M. (1858). Herbarium Normale Plantarum Rariorum et Criticarum Sueciae, Wahlsr\u00f6m & L\u00e5stbom. nos. 1\u2013100."},{"key":"ref_50","unstructured":"Fries, E.M. (1828). Novitiae Florae Suecicae. Editio Altera, Auctior et in Formam Commentarii in Cel. Wahlenbergii Floram Suecicam Redacta, Berling."},{"key":"ref_51","unstructured":"Fries, E.M. (1818). Flora Hallandica Sistens Enumerationem Vegetabilium in Hallandia Sponte Nascentium, Additis Locis Natalibus et Observationibus Selectis, Berling."},{"key":"ref_52","first-page":"259","article-title":"Vad \u00e4r Hieracium auricula \u03b2 majus Wahlenberg?","volume":"119","author":"Almquist","year":"1966","journal-title":"Bot. Not."},{"key":"ref_53","first-page":"1","article-title":"Anteckningar \u00f6fver Finlands Pilosellae","volume":"2","author":"Norrlin","year":"1884","journal-title":"Acta Soc. Fauna Fl. Fenn."},{"key":"ref_54","first-page":"421","article-title":"N\u00e5gra anteckningar till mellersta Finlands (n. v. Tavastlands) flora","volume":"13","author":"Norrlin","year":"1874","journal-title":"Not. S\u00e4llsk. Fauna Fl. Fenn. F\u00f6rh."},{"key":"ref_55","unstructured":"Mela, A.J. (1877). Lyhyk\u00e4inen Kasvioppi ja Kasvio, Suomalaisen Kirjallisuuden Seura."},{"key":"ref_56","unstructured":"Cajander, A.K. (1906). Suomen Kasvio, Suomalaisen Kirjallisuuden Seura. [5th ed.]."},{"key":"ref_57","unstructured":"Norrlin, J.P. (1884). Herbarium Pilosellarum Fenniae, University of Helsinki. nos. 1\u2013100."},{"key":"ref_58","unstructured":"Norrlin, J.P. (1888). Hieracia Exsiccata, University of Helsinki. nos. 1\u2013145."},{"key":"ref_59","first-page":"183","article-title":"P\u0159ehled \u010deskoslovensk\u00fdch druh\u016f rodu Pilosella Hill","volume":"43","year":"1971","journal-title":"Preslia"},{"key":"ref_60","unstructured":"Fries, E.M. (1949). Herbarium Normale Plantarum Rariorum et Criticarum Sueciae, Wahlsr\u00f6m & L\u00e5stbom. nos. 1\u2013100."},{"key":"ref_61","unstructured":"Wagenitz, G. (1982). Index Collectorum Principalium Herbarii Gottingensis, Im Selbstverlag des Instituts."},{"key":"ref_62","first-page":"1","article-title":"Spridda bidrag till k\u00e4nnedom af Finlands Hieracium-former. III. Nyl\u00e4ndska Piloselloidea","volume":"12","author":"Brenner","year":"1894","journal-title":"Acta Soc. Fauna Fl. Fenn."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"51","DOI":"10.35513\/Botlit.2024.1.6","article-title":"Taraxacum stepanekii, a replacement name for Taraxacum roseolum Kirschner & \u0160t\u011bp\u00e1nek non Charit., with nomenclatural notes on the taxonomic legacy of Boris S. Kharitontsev in the digital era","volume":"30","author":"Sennikov","year":"2024","journal-title":"Botanica"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"83","DOI":"10.3897\/phytokeys.235.111020","article-title":"Taxonomic revision of the Erigeron acris group (Asteraceae) in Murmansk Region, Russia, reveals a complex pattern of native and alien taxa","volume":"235","author":"Sennikov","year":"2023","journal-title":"PhytoKeys"}],"container-title":["Plants"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2223-7747\/13\/10\/1301\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T14:42:14Z","timestamp":1760107334000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2223-7747\/13\/10\/1301"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,5,8]]},"references-count":64,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2024,5]]}},"alternative-id":["plants13101301"],"URL":"https:\/\/doi.org\/10.3390\/plants13101301","relation":{},"ISSN":["2223-7747"],"issn-type":[{"value":"2223-7747","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,5,8]]}}}