Opuscula Philolichenum, 17: 319-321. 2018. *pdf effectively published online 27July2018 via (http://sweetgum.nybg.org/philolichenum/)

New combinations and notes on Buellia and Rostania

GARY B. PERLMUTTER1 AND EIMY RIVAS PLATA2

ABSTRACT. – Buellia pleiotera is here noted as the correct name for of B.”pleiotropa”. New combinations are proposed for Hafellia fosteri and Collema occultum var. populinum to further complete the taxonomic transfers to Buellia and Rostania, respectively.

KEYWORDS. – Nomenclature, , Collemataceae.

INTRODUCTION

During the course of updating the and distributions of in North America for the USDA PLANTS database (http://plants.usda.gov/) in 2015–2016, we discovered some taxa that appeared to have been orphaned by taxonomic changes at higher levels. Here we report our investigations into these taxa and propose changes for each, including two new combinations.

I. HAFELLIA BAHIANA VAR. “PLEIOTROPA” SHOULD BE CORRECTED TO “PLEIOTERA”

Buellia pleiotera Malme, in Arkiv før Botanik 21A (14): 7. 1927. ≡ Hafellia pleiotera (Malme) Marbach, Bibliotheca Lichenologica 74: 274. 2000. ≡ Hafellia bahiana var. pleiotera [as “pleiotropa”] (Malme) Sheard, The Bryologist 95: 82. 1992. TYPE: BRAZIL, MATO GROSSO: Cuyaba, 1893, Malme 2027B (S[n.v.], holotype).

We first encountered the name Hafellia bahiana var. pleiotropa (Malme) Sheard in the USDA PLANTS database. The database lists five taxa in the genus Hafellia Kalb, H. Mayrhofer & Scheid., three of which we were able to readily update based on the then-current version of North American checklist (Esslinger 2015). Esslinger (2015, 2018) listed H. bahiana var. pleiotropa as a synonym of Buellia bahiana var. pleiotropa Malme; however, the latter name is neither listed in nomenclatural databases such as Index Fungorum nor references such as the Catalogus Lichenum Universalis (Zahlbruckner 1931: 339, 389). While Index Fungorum lists the basionym of H. bahiana var. pleiotropa as “B. pleiotropa Malme”, the database record for the latter does not include a bibliographic citation. The MycoBank database lists the same name as “Buellia pleiotropa (?) Malme”; however, that record also lacks a bibliographic citation. In consultation with Frank Bungartz and John Sheard, we learned that Sheard (1992) erroneously introduced the epithet “pleiotropa” in his treatment of North American Hafellia. In that work, Sheard cited “Ark. Bot. 21 A: 18, 1927” as the place of publication for B. pleiotropa when he made the combination H. bahiana var. pleiotropa. Examination of the cited work by Malme (1927: 18) revealed that the epithet was published as “pleiotera” rather than “pleiotropa” and the latter spelling introduced by Sheard (1992) was almost certainly a lapsus calami as had already been noted by Marbach (2000: 275). We agree with Marbach (2000) that the use of “pleiotropa” by Sheard (1992) should be treated as a correctable error, and that “H. bahiana var. peliotropa” and “B. bahiana var. pleiotropa” should be indexed as such on the North American checklist.

1GARY B. PERLMUTTER – University of North Carolina Herbarium, CB #3280 Coker Hall, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, U.S.A. – e-mail: [email protected] 2EIMY RIVAS PLATA – University of North Carolina Herbarium, CB #3280 Coker Hall, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, U.S.A. – e-mail: [email protected]

319 II. TRANSFER OF HAFELLIA FOSTERI TO BUELLIA

Buellia fosteri (Imshaug & Sheard) Perlmutter & Rivas Plata, comb. nov. Mycobank #827050.

≡ Hafellia fosteri Imshaug & Sheard, Bryologist 95: 85. 1992. TYPE: U.S.A., WASHINGTON: Pacific Beach, old roots and logs on beach, 5.III.1911, Foster s.n. (FH[n.v.], holotype).

Hafellia was rendered synonymous with Buellia De Not. when a proposal to replace the conserved type, B. disciformis (Fr.) Mudd, with B. aethalea (Ach.) Th. Fr., was not recommended by the Nomenclature Committee of Fungi (NCF), which is part of the International Association for Plant Taxonomy (Gams 2004, Moberg 1999). That proposal had attempted to retain B. disciformis as the type for Hafellia, as H. disciformis (Fr.) Marbach & H. Mayrhofer, so that the name could continue to be applied to a distinctive group of crustose lichens with thickened ascospore walls that had historically been treated in Buellia. The NCF declined to endorse the proposal to change the type of Buellia and deferred action pending more comprehensive understanding of the taxonomy and phylogeny of the genus. As a result, all taxa treated in Hafellia should be transferred to Buellia until a change in the typification is formally approved. Hafellia fosteri is listed in USDA PLANTS as “accepted”. In Esslinger (2018) it is listed under Buellia as “[Hafellia fosteri Imshaug & Sheard]” with the brackets indicating placement in Buellia despite the absence of a published combination. The name for this species was originally introduced as “Buellia fosteri” by Henry Imshaug in his Ph.D dissertation (Imshaug 1951). However, it was not subsequently, validly published. Sheard (1992) described this taxon as a new species in his treatment of North American Hafellia, crediting Imshaug as a coauthor but validating the name in Hafellia instead of Buellia (Sheard 1992). Now that Hafellia must be treated as a synonym of Buellia, we provide a validly published combination in Buellia.

III. TRANSFER OF COLLEMA OCCULTATA VAR. POPULINA TO ROSTANIA

Rostania occultata var. populina (Th. Fr.) Perlmutter & Rivas Plata, comb. nov. Mycobank #827051.

≡ Collema verruciforme f. populinum Th. Fr., Nova Acta Regiae Societatis Scientarum Upsaliensis 3: 379. 1861. ≡ Collema occultatum Bagl. var. populinum (Th. Fr.) Degel., Symbolae Botanicae Upsalienses 13(2): 245. 1954. TYPE: NORWAY, NORDLAND: Saltdal, Saltdalen, no date, Sommerfelt s.n. (UPS[n.v.], holotype).

The Collema occultatum-group was transferred to the resurrected genus Rostania Trevis. by Otálora et al. (2014). However, the variety populinum was not formally included in the transfer. Collema occultatum var. populinum is known from Alabama to California in the United States (Degelius 1974); however, it is not currently listed in the North American lichen checklist (Esslinger 2018). We propose the new combination to complete the transfer of available names in the C. occultatum-group to Rostania. We also recommend it be added to the North American lichen checklist.

ACKNOWLEDGEMENTS

We thank taxonomic experts Frank Bungartz, Monica Otálora, John Sheard and Mats Wedin for their insight. This study was conducted as part of a contract between UNC-Chapel Hill and USDA NRCS to update the taxonomy, nomenclature and distribution of lichens occurring in the contiguous United States for the USDA PLANTS database. Therefore, we thank Doug Goldman and Gerry Moore for reaching out to us for the opportunity to carry out this project, as well as to Alan Weakley for acting as its Principal Investigator. Finally, we thank James Lendemer and an anonymous reviewer for comments and editing that improved the manuscript considerably.

320 LITERATURE CITED

Degelius, G. 1954. The lichen genus Collema in Europe: Morphology, taxonomy, ecology. Symbolae Botanicae Upsaliensis 13: 1–499. Degelius, G. 1974. The lichen genus Collema with special reference to the extra-European species. Symbolae Botanicae Upsaliensis. 20(2): 1–215. Esslinger, T.L. 2015. A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada. North Dakota State University: http://www.ndsu.edu/pubweb/~esslinge- /chcklst/chcklst7.htm (First Posted 1 December 1997, Most Recent Version (#20) 19 April 2015), Fargo, North Dakota. Esslinger, T.L. 2018. A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada, version 22. Opuscula Philolichenum 17: 6–268. Gams, W. 2004. Report of the Committee for Fungi: 11. Taxon 53: 1067–1069. Imshaug, H.A. 1951. The lichen-forming species of the genus Buellia occurring in the United States and Canada. Ph.D. dissertation, University of Michigan, Ann Arbor. 223 pp. Malme, G.O.A. 1927. Buelliae itineris Regnelliani primi. Arkiv för Botanik 21A(14): 1–42. Marbach, B. 2000. Corticole und lignicole Arten der Flechtengattung Buellia sensu lato in den Subtropen und Tropen. Bibliotheca Lichenologica 74: 1–384. Moberg, R., A. Nordin and C. Scheidegger. 1999. (1384) Proposal to change the listed type of the name Buellia, nom. cons. (Physciaceae, lichenised ). Taxon 48: 143. Otálora, M.A.G., P.M. Jørgensen and M. Wedin. 2014. A revised generic classification of the jelly lichens, Collemataceae. Fungal Diversity 64: 275–293. Sheard, J.W. 1992. The lichenized ascomycete genus Hafellia in North America. The Bryologist 95: 79–87. Zahlbruckner, A. 1931. Catalogus Lichenum Universalis 7: i–ii, 1–784. Borntraeger, Leipzig.

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