Field key to the complex thalloid liverworts (Marchantiales) occurring in Switzerland and Northern Italy

Chiave da campo per le epatiche talloidi complesse (Marchantiales) segnalate in Svizzera e in Italia settentrionale.

Taxonomic synopsis of European species and their presence in Switzerland (swissbryophytes.ch) and in Northern Italy, including Liguria and Tuscany (Aleffi et al., 2023, Plant Biosystems, 157-6): np = not present; p = present; (p) = present but not reported in the national checklist; ? = doubtful.

Taxa								Study area
								Switzerland	N. Italy
Marchantiophyta Stotler & Crand.-Stotl.
	Marchantiopsida Cronquist, Takht. & W.Zimm.
		Marchantiidae Engl.
			Marchantiales Limpr.
				Aytoniaceae Cavers
					Asterella P.Beauv.
						A. africana (Mont.) Underw. ex A.Evans		np	(p) [1]
						A. lindenbergiana (Corda ex Nees) Lindb. ex Arnell		p	p
						A. saccata (Wahlenb.) A.Evans		p	p
					Mannia Corda
						M. androgyna (L.) A.Evans		p	p
						M. californica (Gottsche) L.C.Wheeler		np	p
						M. controversa (Meyl.) D.B.Schill  subsp. controversa		p	(p) [2]
						M. fragrans (Balb.) Frye et L.Clark subsp. fragrans		p	p
						M. gracilis (F.Weber) D.B.Schill et D.G.Long		p	p
						M. pilosa (Hornem.) Frye et L.Clark		p	p
						M. sibirica (Müll.Frib.) Frye et L.Clark		np	np
						M. triandra (Scop.) Grolle		p	p
					Plagiochasma Lehm. [3]
						P. appendiculatum Lehm. et Lindenb.		np	np
						P. rupestre (J.R.Forst. et G.Forst.) Steph. var. rupestre		p	p
					Reboulia Raddi
						Reboulia hemisphaerica (L.) Raddi [4]		p	p
							subsp. australis R.M.Schust.	(p)?	(p)?
							subsp. dioica R.M.Schust.	np	np
							subsp. hemisphaerica	(p)?	(p)?
				Cleveaceae Cavers
					Clevea Lindb.
						C. hyalina (Sommerf.) Lindb.		p	p
						C. spathysii (Lindenb.) Müll.Frib.		np	np
					Peltolepis Lindb.
						P. quadrata (Saut.) Müll.Frib.		p	p
					Sauteria Nees
						S. alpina (Nees) Nees		p	p
				Conocephalaceae Müll.Frib. ex Grolle
					Conocephalum Hill
						C. conicum (L.) Dumort.		p	p
						C. salebrosum Szweyk.		p	p
				Corsiniaceae Engl.
					Corsinia Raddi
						C. coriandrina (Spreng.) Lindb.		p	p
				Cyathodiaceae Stotler et Crand.-Stotl.
					Cyathodium Kunze
						Cyathodium foetidissimum Schiffn. [5]		np	np
				Dumortieraceae D.G.Long
					Dumortiera Nees
						D. hirsuta (Sw.) Nees subsp. hirsuta		np	p
				Exormothecaceae Müll.Frib. ex Grolle
					Exormotheca Mitt.
						E. pustulosa Mitt.		np	np
						E. welwitschii Steph.		np	np
				Lunulariaceae H.Klinggr.
					Lunularia Adans.
						L. cruciata (L.) Dumort. ex Lindb. subsp. cruciata		p	p
				Marchantiaceae Lindl.
					Marchantia L.
						M. paleacea Bertol. subsp. paleacea		p	p
						M. polymorpha L.
							subsp. montivagans Bischl. et Boissel.-Dub.	p	p
							subsp. polymorpha	p	p
							subsp. ruderalis Bischl. et Boissel.-Dub.	p	p
						M. quadrata Scopoli
							subsp. hyperborea (R. M. Schust.) Borovich. [6]	np	(p)?
							subsp. quadrata	p	p
						M. romanica Radian		np	np
				Oxymitraceae Müll.Frib. ex Grolle
					Oxymitra Bisch. ex Lindenb.
						O. incrassata (Brot.) Sérgio et Sim-Sim		p	p
				Ricciaceae Rchb.
					Riccia L.
						not treated herein		p	p
					Ricciocarpos Corda
						R. natans (L.) Corda		p	p
				Targioniaceae Dumort.
					Targionia L.
						T. hypophylla L. subsp. hypophylla		p	p
						T. lorbeeriana Müll.Frib.		np	p

 

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[1] Lelli A., Lelli S., Tiburtini M., Brusa G., 2024. Asterella africana detected by citizen scientists at its northernmost distribution in Europe (Tuscany, Italy). Borziana, 5: 47-58.

 

[2] Brusa G., 2023. Mannia controversa (Marchantiophyta, Aytoniaceae): un’epatica nuova per la flora italiana. Rev. Valdôtaine Hist. Nat., 77: 111-116.

 

[3] In addition to these two species, there is at least a third Plagiochasma from Caucasus (not yet identified at species level):

·          https://www.inaturalist.org/observations/222980275

·          https://www.inaturalist.org/observations/206102776

·          https://www.inaturalist.org/observations/203868714

 

[4] These subspecies are globally recognized by some Authors (e.g. Schuster, 1992, VI: the Hepaticae and Anthocerotae of North America, Field Museum of Natural History) but not for European plants by others (e.g. Boisselier-Dubayle et al., 1998, The Bryologist, 101-1).

 

[5] Doubtful taxon: no characters is sufficient to separate it from the nominal subspecies, including the sexual condition (M. quadrata s.l. is monoicous not dioicous!; e.g. Boisselier-Dubayle & Bischler 1997, Plant Systematics and Evolution 205).

 

[6] This species was only collected by Duckett & Ligrone in Campania (2006, Journal of bryology, 28-2, 88-96). However, the specimens reported and shown by these Authors do not correspond to the description and illustrations of the genus Cyathodium. As speculated by Hugonnot & Chavoutier (2021, Les Bryophytes de France, Volume 1, Biotope Éditions), the characteristics of these specimens are those of relatively common shade plants of the genus Conocephalum. During an inspection in the original site in Campania, Brusa G. confirmed Hugonnot & Chavoutier’s speculation (op. cit.); in addition, the specimens were returned to the normal form of Conocephalum (C. conicum s.s.) after growing them in light.

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