Superregnum: Eukaryota
Regnum: Plantae
Divisio: Tracheophyta
Divisio: Pteridophyta
Classis: Polypodiopsida
Ordo: Polypodiales
Familia: Pteridaceae
Subfamilia: Pteridoideae
Genus: Jamesonia
Species: J. accrescens – J. alstonii – J. angusta – J. ascendens – J. aureonitens – J. auriculata – J. biardii – J. blepharum – J. bogotensis – J. boliviensis – J. brasiliensis – J. canescens – J. caracasana – J. ceracea – J. cheilanthoides – J. chiapensis – J. cinnamomea – J. congesta – J. crespiana – J. cuatrecasasii – J. elongata – J. erecta – J. ewanii – J. feei – J. flabellata – J. flexuosa – J. galeana – J. glaberrima – J. glandulifera – J. glaziovii – J. goudotii – J. hirsutula – J. hirta – J. hispidula – J. imbricata – J. insignis – J. laxa – J. lechleri – J. lindigii – J. longipetiolata – J. madidiensis – J. mathewsii – J. maxonii – J. novogranatensis – J. orbignyana – J. osteniana – J. panamensis – J. paucifolia – J. peruviana – J. pulchra – J. refracta – J. retroflexa – J. retrofracta – J. robusta – J. rotundifolia – J. rufescens – J. scalaris – J. scammaniae – J. setulosa – J. stuebelii – J. vellea – J. verticalis – J. warscewiczii – J. wurdackii
Nothospecies: J. × intermedia
Belonging to this genus, but without valid combination: Psilogramme hookeri – ×Eriosonia incognita – ×Eriosonia kupperi – Eriosorus × lasseri – ×Eriosonia longifolia – ×Eriosonia rollaliciana
Name
Jamesonia Hook. & Grev., Icon. Filic. 2: t. 178 (1830).
Type species: Jamesonia pulchra Hook. & Grev.
Synonyms
Homotypic
Psilogramme sect. Jamesonia (Hook. & Grev.) Kuhn, Chaetopterides 332 (1882).
Gymnogramma sect. Jamesonia (Hook. & Grev.) Klotzsch, Linnaea 20: 407 (1847).
Heterotypic
Psilogramme Kuhn, Chaetopterides: 12 (1882).
× Eriosonia Pic.Serm., Webbia 31: 242 (1977).
Nephopteris Lellinger, Amer. Fern J. 56: 180 (1966).
Eriosorus Fée, Mém. Foug., 5. Gen. Filic.: 152 (1852).
Distribution
Native distribution areas:
Continental: Northern America
Regional: Mexico
Mexico Southwest, Mexico Southeast.
Continental: Southern America
Regional: Central America
Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua.
Regional: Caribbean
Cuba, Dominican Republic, Puerto Rico, Windward Islands.
Regional: Northern South America
Guyana, Venezuela.
Regional: Western South America
Bolivia, Colombia, Ecuador, Peru.
Regional: Brazil
Brazil Southeast, Brazil South.
Regional: Southern South America
Uruguay.
Continental: Antarctic
Regional: Subantarctic Islands
Tristan da Cunha.
References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references
Hooker, W.J. & Greville, R.K. 1827–1831. Icones Filicum ad eas potissimum species illustrandas destinatæ, quæ hactenus, vel in herbariis delituerunt prorsus incognitae, vel saltem nondum per icones botanicis innotuerunt. 2 vols, CCXL pl. Prostant Venales Apud Treuttel et Würtz, Treuttel Fil. et Richter, London. DOI: 10.5962/bhl.title.3867 Reference page.
Additional references
Tryon, A.F. 1962. A Monograph of the Fern Genus Jamesonia. Contributions from the Gray Herbarium of Harvard University 191: 109–192. JSTOR BHL Reference page.
Pabón-Mora, N. & González, F. 2015. Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesonia clade. Brittonia 68(1): 83–92. DOI: 10.1007/s12228-015-9394-0 Reference page.
Links
Hassler, M. 2021. World Ferns. Checklist of Ferns and Lycophytes of the World. . Jamesonia Accessed: 16 Aug 2021.
Hassler, M. 2021. Jamesonia – World Ferns: Checklist of Ferns and Lycophytes of the World . In: Roskov Y., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., De Wever A., Nieukerken E. van, Zarucchi J. & Penev L. (eds.) 2021. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2021 Aug 16.
Govaerts, R. et al. 2021. Jamesonia in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Aug 16. Reference page.
Tropicos.org 2021. Jamesonia. Missouri Botanical Garden. Published online. Accessed: 16 Aug 2021.
International Plant Names Index. 2021. Jamesonia. Published online. Accessed: 16 Aug 2021.
Jamesonia is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus Eriosorus.[1]
Description
Species of Jamesonia are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish Jamesonia and Eriosorus,[2] but do not correspond to the evolutionary history of the species.[3] Species with "Jamesonia-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "Eriosorus-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks (petioles and rachises) of the frond are dark brown and usually grooved on the upper (adaxial) surface. The sori occur along the veins of the segments of the fronds or are sometimes spread more widely on the lower (abaxial) surface of the frond.[2]
Botanical illustration of Jamesonia verticalis and Jamesonia hispidula (syn. Eriosorus hispidulus); the first with "Jamesonia-type" morphology, the second with "Eriosorus-type" morphology
Taxonomy
The genus Jamesonia was first described by William Jackson Hooker and Robert Kaye Greville in 1830, initially with one species, Jamesonia pulchra. The genus Eriosorus, proposed by Antoine Fée in 1852, was recognized as closely related, both genera being placed in the taenitidoid group of the subfamily Pteridoideae. A molecular phylogenetic study in 2004 showed that neither genus was monophyletic on its own, but that together they formed a clade.[3] Subsequent classifications have treated the two as a single genus, Jamesonia.[4][1] A further study in 2015 showed that the genus Nephopteris with the sole species N. maxonii belonged in the same clade.[5] It is now also included in Jamesonia.[1]
Phylogeny
Within the subfamily Pteridoideae, Jamesonia forms a clade with five other genera, the so-called "JAPSTT" clade, which is one of four major clades within the subfamily Pteridoideae identified in a 2017 study.[6]
| JAPSTT clade |
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Species
Jamesonia accrescens (A.F.Tryon) Christenh.
Jamesonia alstonii A.F.Tryon
Jamesonia angusta (M.Kessler & A.R.Sm.) Christenh.
Jamesonia ascendens (A.R.Sm. & M.Kessler) Christenh.
Jamesonia aureonitens (Hook.) Christenh.
Jamesonia auriculata A.F.Tryon
Jamesonia biardii (Fée) Christenh.
Jamesonia blepharum A.F.Tryon
Jamesonia bogotensis H.Karst.
Jamesonia boliviensis A.F.Tryon
Jamesonia brasiliensis Christ
Jamesonia canescens (Klotzsch) Kunze
Jamesonia caracasana (Baker) Christenh.
Jamesonia ceracea Maxon
Jamesonia cheilanthoides (Sw.) Christenh.
Jamesonia chiapensis (Maxon) Christenh.
Jamesonia cinnamomea Kunze
Jamesonia congesta (Christ) Christenh.
Jamesonia crespiana Bosco
Jamesonia cuatrecasasii A.F.Tryon
Jamesonia elongata J.Sm.
Jamesonia ewanii (A.F.Tryon) Christenh.
Jamesonia feei (Copel.) Christenh.
Jamesonia flabellata (Hook. & Grev.) Christenh.
Jamesonia flexuosa (Humb. & Bonpl.) Christenh.
Jamesonia glaberrima (Maxon) Christenh.
Jamesonia glaziovii (C.Chr.) Christenh.
Jamesonia goudotii C.Chr.
Jamesonia hirsutula (Mett.) Christenh.
Jamesonia hirta (Kunth) Christenh.
Jamesonia hispidula Kunze
Jamesonia imbricata (Cav.) Hook. & Grev.
Jamesonia insignis (Kuhn) Christenh.
Jamesonia laxa Kuntze
Jamesonia lechleri (Kuhn) Christenh.
Jamesonia lindigii (Mett.) Christenh.
Jamesonia longipetiolata (Hieron.) Christenh.
Jamesonia madidiensis (M.Kessler & A.R.Sm.) Christenh.
Jamesonia mathewsii (Hook.) Christenh.
Jamesonia maxonii (Lellinger) Pabón-Mora & F.González
Jamesonia novogranatensis (A.F.Tryon) Christenh.
Jamesonia orbignyana (Kuhn) Christenh.
Jamesonia osteniana (Dutra) Gastony
Jamesonia paucifolia (A.C.Sm.) Christenh.
Jamesonia peruviana A.F.Tryon
Jamesonia pulchra Hook. & Grev.
Jamesonia robusta H.Karst.
Jamesonia rotundifolia Fée
Jamesonia rufescens (Fée) Christenh.
Jamesonia scalaris Kunze
Jamesonia scammaniae A.F.Tryon
Jamesonia setulosa (Hieron.) Christenh.
Jamesonia stuebelii (Hieron.) Christenh.
Jamesonia vellea (A.F.Tryon) Christenh.
Jamesonia verticalis Kunze
Jamesonia warscewiczii (Mett.) Christenh.
Jamesonia wurdackii (A.F.Tryon) Christenh.
References
PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi:10.1111/jse.12229. S2CID 39980610.
Della, Aline Possamai & Prado, Jefferson (2020). "Jamesonia (Pteridaceae) in Brazil". Biota Neotropica. 20 (2): e20200986. doi:10.1590/1676-0611-bn-2020-0986.
Sánchez-Baracaldo, Patricia (2004). "Phylogenetics and biogeography of the neotropical fern genera Jamesonia and Eriosorus (Pteridaceae)". American Journal of Botany. 91 (2): 274–284. doi:10.3732/ajb.91.2.274. PMID 21653383.
Christenhusz, Maarten J. M.; Zhang, Xian-Chun; Schneider, Harald (2011). "A linear sequence of extant families and genera of lycophytes and ferns". Phytotaxa. 19 (1): 7. doi:10.11646/phytotaxa.19.1.2. ISSN 1179-3163.
Pabón-Mora, Natalia & González, Favio (2015). "Nephopteris out of the clouds: Molecular evidence places the enigmatic N. maxonii (Pteridaceae) within the Jamesoniaclade". Brittonia. 68: 83–92. doi:10.1007/s12228-015-9394-0. S2CID 15337534.
Zhang, Liang; Zhou, Xin-Mao; Lu, Ngan Thi & Zhang, Li-Bing (2017). "Phylogeny of the fern subfamily Pteridoideae (Pteridaceae; Pteridophyta), with the description of a new genus: Gastoniella". Molecular Phylogenetics and Evolution. 109: 59–72. doi:10.1016/j.ympev.2016.12.037. PMID 28049040.
Bibliography
Wikimedia Commons has media related to Jamesonia.
Pichi-Sermolli, Rodolfo E. G. (1977). "Fragmenta Pteridologiae—VI". Webbia. 31 (1): 242. doi:10.1080/00837792.1977.10670073. ISSN 0083-7792.
Schuettpelz, Eric; Schneider, Harald; Huiet, Layne; Windham, Michael D.; Pryer, Kathleen M. (2007). "A molecular phylogeny of the fern family Pteridaceae: Assessing overall relationships and the affinities of previously unsampled genera" (PDF). Molecular Phylogenetics and Evolution. 44 (3): 1172–1185. doi:10.1016/j.ympev.2007.04.011. ISSN 1055-7903. PMID 17570688. Archived from the original (PDF) on 2008-08-20.
Tryon, Alice F. (1970). "A monograph of the fern genus Eriosorus". Contributions from the Gray Herbarium of Harvard University. 200 (200): 54–174. JSTOR 41764694.
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