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Pleopeltis macrocarpa (Bory ex Willd.) Kaulf. ‘typical form’— Habit: Fern. Habitat: LMWF, LMDF, BZ, UMF, HZ; 1 300–3 600 m. Distribution: I. Voucher: Sirimon Track, Alt. 2 667 m, 17 Jul. 2014, SAJIT 001865 (EA). References: Fries et al. (1924b), Schelpe (1951), Bussmann (1993, 1994), Bussmann & Beck (1995a, 1998), Agnew (2013)., Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 21, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464, {"references":["Fries, R. E., Fries, T. C. E. & Christensen, C. (1924 b) Beitrage zur Kenntnis der Flora des Kenia, Mt. Aberdare und Mt. Elgon. VI. Notizblatt des Koniglichen Botanischen Gartens und Museums zu Berlin 9 (83): 173 - 189. https: // doi. org / 10.2307 / 3994334","Schelpe, E. A. C. L. E. (1951) The Pteridophyta of Mount Kenya. American Fern Journal 41 (3): 65 - 74. https: // doi. org / 10.2307 / 1545044","Bussmann, R. W. (1993) The forest of Mt. Kenya (Kenya): A phytosociological approach with special reference to ecological problems. Ph. D. Thesis, Eberhard Karls Universitat Tubingen, Tubingen, 119 pp.","Bussmann, R. W. (1994) The forest of Mt. Kenya (Kenya): Vegetation, ecology, destruction and management of a tropical mountain forest ecosystem. Ph. D. dissertation, Universitat Bayreuth Startseite, Bayreuth, 252 pp.","Bussmann, R. W. & Beck, E. (1995 a) The forests of Mt. Kenya (Kenya), a phytosociological synopsis. Phytocoenologia 25 (4): 467 - 560. https: // doi. org / 10.1127 / phyto / 25 / 1995 / 467","Bussmann, R. W. & Beck, E. (1998) The plant communities of the forests of Mount Kenya - First phytosociological and ecological data. In: Ojany, F. F. (Ed.) African mountains and highlands - planning for sustainable use of mountain resources. United Nations University, Tokyo, pp. 96 - 107.","Agnew, A. D. Q. (2013) Upland Kenya wild flowers and ferns, 3 rd edn. Nature Kenya Publications, Nairobi, 733 pp."]}

Pleopeltis pleopelti­folia (Raddi) Alston is first cited for Buenos Aires province (Argentina). Furthermore, we provide new collecting sites for Pleopeltis minima (Bory) J. Prado & R.Y. Hirai and P. macrocarpa (Bory ex Willd.) Kaulf. Species that motivate this article characterize Mesopotamia gallery forests. They seem to be expanding their geographical distribution southwards, like other vascular plants and animals from the Platense area of the province. To prove if this shift can be attributed to the cli­mate change, the advance distance of these taxa and other plants re­cently registered south from their previously known distribution was measured in three sites of northeastern Buenos Aires. This distance was compared with the shift of the isohyets and isotherms. The correlation between the biogeographic shift and the trend of climate change in the region is highlighted. Se cita por primera vez para la provincia de Buenos Aires (Argentina) la especie Pleopeltis pleopeltifolia (Raddi) Alston. Además se brindan nuevas localidades para Pleopeltis minima (Bory) J. Prado & R.Y. Hirai y para P. macrocarpa (Bory ex Willd.) Kaulf. Las especies que motivan este artículo son características de los bosques en galería de la Mesopotamia. Las mismas parecen estar extendiendo su distribución geográfica hacia el sur, al igual que otras plantas vasculares y animales del área Platense de la provincia. Con el objetivo de comprobar si se puede atribuir este corrimiento al cambio climático se calculó la dis­tancia de avance de estos taxa y de otras plantas registradas reciente­mente al sur de su distribución conocida en tres localidades del norte de Buenos Aires. Esta distancia se comparó con el corrimiento estimado de las isohietas e isotermas. Se destaca que existe concordancia entre el cambio biogeográfico y la tendencia observada de cambio climático en la región.

Polypodium lanceolatum Linnaeus, Species Plantarum 2: 1082. 1753. "Habitat in America meridionali." RCN: 7852. Lectotype (Hedberg in Symb. Bot. Upsal. 15(1): 31. 1957): [icon] "Phyllitis maculata, folio longo angustifolia maculis majoribus" in Petiver, Pteri-graphia Amer.: 8, t. 6, f. 2. 1712. Current name: Pleopeltis macrocarpa (Willd.) Kaulf. (Polypodiaceae). Note: See comments by Weatherby (in Contr. Gray Herb. 65: 3. 1922), who did not, however, explicitly refer to the Petiver plate as the type., Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part P), pp. 718-782 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on pages 760-761, DOI: 10.5281/zenodo.291971

Interpretation of the polypodioid ferns has been a classic problem for pteridologists. The groupings are, with some exceptions, fairly clear, but whether they should be treated as subgenera of Polypodium or as distinct genera is a matter of considerable disagreement. There seems to be growing acceptance of their recognition as distinct genera (Smith 1981, 1985; Tryon & Tryon, 1982; Lellinger, 1985; Mickel & Beitel, in press), although some authors continue to recognize Polypodium in a broad sense (Proctor, 1977, 1985; Stolze, 1981). Some of the splinter genera in America (e.g., Campyloneurum, Niphidium) stand well apart from Polypodium s.s., but others are apparently very closely allied to Polypodium. This is especially so in regard to Pleopeltis, some members of which hybridize with species of Polypodium s.s. The best known example of this is Polypodium x leucosporum (=Polypodium lanceolatum x P. thyssanolepis), which was pointed out by Vareschi (1969) and described in detail by Wagner and Wagner (1975), who treated it and its parents within Polypodium. Recently, Anthony and Schelpe (1985) described a similar case in southern Africa, in which Pleopeltis macrocarpa (Bory ex Willd.) Kaulf. (=Polypodium lanceolatum) crosses with Polypodium polypodioides var. ecklonii (Kunze) Schelpe. The authors gave a hybrid intergeneric name to their hybrid species, x Pleopodium simianum Anthony & Schelpe. In our studies on the ferns of Oaxaca, Mexico (in press), we have seen specimens from various parts of Mexico that involve several members of these two genera. Most of the hybrids have binomials under Polypodium. The purpose of this paper is to make several new combinations under x Pleopodium and Pleopeltis, and to clarify the putative parentage of the hybrids.