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Monograph of the Elaphoglossum ciliatum group (Dryopteridaceae)

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Abstract

The Elaphoglossum ciliatum group was supported by a previous study as monophyletic on the basis of cpDNA sequence data. The present paper provides a monograph of this group. It includes keys, full synonymy, descriptions, specimens examined, index to collectors’ names and numbers, photographs, and distribution maps for all species. Morphologically, these species are characterized by abaxial laminar scales reduced to minute dots, resinous rhizomes, and (except for E. dussii) spiny perispores. These characteristics are not unique to the E. ciliatum group because they are found in other species of Elapholgossum sect. Lepidoglossa. Nine species are here recognized in the E. ciliatum group, with no subspecies or varieties. Six species are neotropical and primarily montane, being largely absent from Amazonia. The remaining three species are endemic to the island of St. Helena in the South Atlantic Ocean. A lectoype is designated for E. calaguala.

Resumen

Se presenta la monografía del grupo de Elaphoglossum ciliatum, un grupo definido como monofilético basado en análisis de secuencias de ADN del cloroplasto. La monografía incluye claves, sinonimia completa, descripciones, especimenes examinados, un índice de colectores y sus números de colección, fotografías y mapas de distribución de todas las especies del grupo. Las especies de este grupo se caracterizan por tener las escamas de la superficie abaxial de la lámina reducidas a puntos muy pequeños, rizomas resinosos y (exceptuando E. dussii) perisporas equinadas. Sin embargo estas características no son únicas al grupo de E. ciliatum, y pueden encontrarse en otras especies de Elapholgossum sect. Lepidoglossa. Se reconocen nueve especies en el grupo de E. ciliatum, sin subespecies ni variedades. Seis especies son neotropicales y principalmente de regiones de montaña. El resto de las especies son endémicas de la isla de St. Helena en el sur del océano Atlántico. Se designa un lectotipo para E. calaguala.

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Literature Cited

  • Brade, A. C. 1964. Algumas espécies novas do gênero Elaphoglossum (Polypodiaceae) da flora do Brasil. Arquivos do Jardim Botânico do Rio de Janeiro 18: 17–23.

    Google Scholar 

  • Christ, H. 1899. Monographie des Genus Elaphoglossum. Neue Denkschr. Allg. Schweiz. Ges. Gesammten Naturwiss. 36: 1–159.

    Google Scholar 

  • Eastwood, A. 2004. Elaphoglossum bifurcatum, E.dimorphum and E. nervosum. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 27 January 2007.

  • Eastwood, A., Q. C. B. Cronk, J. C. Vogel, A. Hemp & M. Gibby. 2004a. Comparison of molecular and morphological data on St Helena: Elaphoglossum. Plant Systematics and Evolution 245: 93–106.

    Google Scholar 

  • Eastwood, A., J. C. Vogel, M. Gibby & Q. C. B. Cronk. 2004b. Relationships and genetic diversity of endemic Elaphoglossum from St. Helena. Plant Systematics and Evolution 245: 107–118.

    CAS  Google Scholar 

  • Lorence, D. H. & G. Rouhan. 2004. A revision of the Mascarene species of Elaphoglossum (Elaphoglossaceae). Annals of the Missouri Botanical Garden 91: 536–565.

    Google Scholar 

  • Mickel, J. T. 1991. Elaphoglossum and Peltapteris. In: R. M. Tryon & R. G. Stolze (eds.), Pteridophyta of Peru, Part IV, 17. Dryopteridaceae. Fieldiana Bot., n.s. 27: 111–170.

  • ———. 1995a. Elaphoglossum. In: J. A. Steyermark, P. E. Berry & B. K. Holst (eds.), Flora of the Venezuelan Guayana. 2: 89–105. Timber Press, Portland, Oregon.

  • ———. 1995b. Elaphoglossum and Peltapteris. In: R. C. Moran & R. Riba (eds.), Psilotaceae a Salviniaceae. Flora Mesoamericana. 1: 250–283, Univ. Nacional Autónoma de México, Ciudad Universitaria.

  • ——— & L. Atehortúa. 1980. Subdivision of the genus Elaphoglossum. American Fern Journal 70: 47–68.

    Article  Google Scholar 

  • ——— & A. R. Smith. 2004. The Pteridophytes of Mexico. The New York Botanical Garden, Bronx, NY: 1–1055.

  • Moran, R. C., J. G. Hanks & G. Rouhan. 2007. Spore morphology in relation to phylogeny in the fern genus Elaphoglossum (Dryopteridaceae). International Journal of Plant Sciences 168: 905–929.

    Article  Google Scholar 

  • Proctor, G. R. 1977. Pteridophyta. In: R. A. Howard (ed.), Flora of the Lesser Antilles. 2: 195–216. Arnold Arboretum of Harvard University, Jamaica Plain, Massachusetts.

  • Rosenstock, E. 1907. Beiträge zur Pteridophyten flora Südbrasiliens. Hedwigia 46: 57–167.

    Google Scholar 

  • Rouhan, G. & G. Cremers. 2006. Lectotypifications of some American Acrostichum and Elaphoglossum (Elaphoglossaceae). Systematics and Geography of Plants 76: 179–183.

    Google Scholar 

  • ———, J. Y. Dubuisson, F. Rakotondrainibe, T. J. Motley, J. T. Mickel, J. N. Labat & R. C. Moran. 2004. Molecular phylogeny of the fern genus Elaphoglossum (Elaphoglossaceae) based on chloroplast non-coding DNA sequences: contributions of species from the Indian Ocean area. Molecular Phylogenetics and Evolution 33: 745–763.

    Article  PubMed  CAS  Google Scholar 

  • Skog, J. E., J. T. Mickel, R. C. Moran, M. Volovsek & E. A. Zimmer. 2004. Molecular studies of representative species in the fern genus Elaphoglossum (Dryopteridaceae) based on cpDNA sequences rbcL, trnL-F, and rps4-trnS. International Journal of Plant Sciences 165: 1063–1075.

    Article  CAS  Google Scholar 

  • Vasco, A., R. C. Moran & G. Rouhan. In press. Circumscription and phylogeny of the Elaphoglossum ciliatum group (sect. Lepidoglossa, Dryopteridaceae) based on cpDNA sequences. Taxon.

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Acknowledgments

This research was partly funded by a grant from the National Science Foundation to Moran (DEB 0211969). Financial support for the first author was also provided by the Oliver Hazard Perry Fellowship from the New York Botanical Garden. We thank Judith Garrison Hanks for helping take some of the SEM images of the spores, John T. Mickel for discussion about Elaphoglossum and comments on the manuscript, and Josmaily Loriga for sending pictures of Cuban specimens. We are grateful to Lawrence Kelly, Paulo Labiak, and Michael Sundue for useful comments that greatly improved the manuscript. We also thank the personnel of the following herbaria for allowing us to examine material and for loans: AAU, B, BR, BM, CAY, COL, CR, F, GH, HUA, INB, JBSD, K, MICH, MO, P, QCA, QCNE, S, SEL, STR, UC, US, USM, USZ, VEN. This paper is part of the first author’s Ph.D. thesis at the City University of New York; she wants to dedicate it to her family (mother, sister and brother) for their continuous support and love while abroad.

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Correspondence to Alejandra Vasco.

Appendices

Appendix 1. List of Taxa

  1. 1.

    Elaphoglossum bifurcatum (Jacq.) Mickel

  2. 2.

    E. burchellii (Baker) C. Chr.

  3. 3.

    E. ciliatum (C. Presl) T. Moore

  4. 4.

    E. dimorphum (Hook. & Grev.) T. Moore

  5. 5.

    E. dussii Underw. ex Maxon

  6. 6.

    E. gramineum (Jenm.) Urb.

  7. 7.

    E. huacsaro (Ruíz) H. Christ

  8. 8.

    E. nervosum (Bory) H. Christ

  9. 9.

    E. nigrescens (Hook.) T. Moore ex Diels

Appendix 2. List of Exsiccatae

The number in parentheses refers to the species number assigned in the monograph; the numbers in boldface are types.

Acebey, 176 (2)

Acevedo, 2976 (5)

Acosta-Arteaga, 73 (7); 165, 324, 359 (2); 493, 779 (7); 800 (2); 1071, 1082 (7); 1205 (2)

Acuña, 20323 (6)

Agostini, 2835 (2); 2863 (7)

Aguinda, 999 (3)

Allart, 374 (2)

Albert de Escobar, 5573, 7400 (7)

Alfaro, 1117 (3)

Alston, 6517, 7419 (7)

Amorim, 5812 (9)

Anderson, 3223 (6); 7523, 8864 (2)

André, 1961 (3)

Angulo, 71 (9); 602 (3)

Arbeláez, 84, 1244 (7)

Archer, 1278 (2)

Arroyo, 2743 (2)

Asplund, 16945, 17135, 17412 (7)

Atehortúa, 1004, 1014 (7)

Atwood, AN196 (9)

Aulestia, 1722, 1957, 2000 (9)

Azofeifa, 108, 109 (9)

Baker, 5537 (3)

Balansa, 390 (2)

Balslev, 1725, 2474, 2476A (7); 10327 (3); 10336 (2); 10402 (3); 84690, 97427 (9)

Barclay, 4459 (7)

Barringer, 2284 (9)

Bass, 172 (3)

Bayon, 98 (2)

Beck, 465 (9)

Beitel, 85268 (9)

Bell, 666 (7)

Bello, 978 (9); 2712, 4501 (3); 4578 (9)

Bischler, 1233, 1318, 2258 (7)

Bittner, 206 (9); 686, 709 (3); 1014, 1227 (9); 1722 (2); 2024, 2354 (3)

Boyle, 4915, 4958 (3)

Brade, 80, 81 (7); 236 (9); 237(7); 528 (3); 7605, 8415 (9); 9759 (7); 9764 (2)

Brandbyge, 30808 (9); 42517 (7)

Breedlove, 22412, 23167 (7)

Brenes, 19274, 20531 (3)

Bridarolli, 4338, 4402 (2)

Bristol, 456 (3)

Britton, 690 (5)

Broadway, 1900 (5)

Buchtien, 8 (9); 2712 (7); 5169 (2); 5175 (9); 5927 (7)

Bües, 2100 (7)

Burch, 4619 (3)

Burchell, 177 (1); 180 (4); 5155 (2)

Burger, 5018 (3); 5097 (9); 5808 (9)

Callejas, 3834, 3891 (7); 10504 (3); 10518 (7)

Camp, 4661 (7)

Campos, 3677 (2)

Carvajal, 453 (9)

Carvalho, 112 (2)

Chavarría, 24 (2); 485 (9)

Chockerong, 116 (6)

Christenhusz & Katzer, 3221 (7); 4011 (5)

Churchill, 4933, 4935 (9)

Clark, 163, 578, 4875, 6441 (3); 8079 (7); 9059 (3)

Clarke, 5453 (9)

Clute, 82 (7)

Colella, 1366 (7); 1601, 1602 (9)

Core, 451 (7)

Cornman, 1354 (3)

Correa, 18A134 (7)

Correll, E419 (7)

Cotton, 905, 929 (9)

Croat, 821, 824 (7); 27272 (9); 35768 (3); 36458 (9); 41016 (7); 49976 (3); 51523 (7); 59961, 70770 (3); 72196 (7); 88085 (3); 92143, 93854 (7)

Crosby, 2564 (3)

Cuatrecasas, 11469 (7); 13938 (3); 26800 (7)

Cumming, 420, 2464 (1)

Cuninghame, 135 (1)

Davidse, 21137 (2); 23226 (3); 23424 (9)

Dawson, 14507, 14574 (2)

de Garganta, 2047 (7)

de la Sota, 5209 (3); 6206 (7)

de Nevers, 5401 (3)

Díaz C., 2171, 3605 (7)

Díaz S., 1666, 3015 (7)

Dodson, 10670, 10674, 10752, 10756, 10757 (7); 10761 (2); 10774, 10802 (3); 10895, 12088 (7); 14673 (3); 15417 (7)

Dorr, 7292, 7994, 8132, 8214 (7); 8623 (2); 9256 (7)

Duncan, 2607 (7)

Dusén, 735, 2045, 2748, 4045, 7225, 7280 (2)

Duss, 1622, 1623, 4130, 4130, 4131, 4150, 4400, 4607, 4688, 4748 (5)

Dwyer, 4493 (9)

Eberhardt, 166, 300, 421, 423, 442 (2)

Ekman, 13878 (7)

Engler, 62 (2)

Evans, 221 (2)

Ewan, 16589 (7)

Fay, 1580, 1605, 1606 (7); 2193, 2487 (2); 2651A (3); 4273, 4308 (7)

Fendler, 276, 280 (2)

Fernández, 27, 223A (7)

Feuerer, 8750A (2)

Folsom, 3298, 3980 (3)

Fonnegra, 2773 (7); 5614 (2)

Forzza, 1219 (2)

Fosberg, 43355 (9)

Foster, 1348, 1513 (7); 10792 (3)

Franco, 5098 (3)

Garcia-Barriga, 12604 (2)

Gehriger, 327 (7)

Gentry, 19319 (7)

Gil, 9 (3)

Giraldo, 1581 (3)

Glaziou, 952, 2433, 2455, 2800, 2855 (2)

Gómez, 247, 2171 (3); 20831 (9); 20845 (9); 22794 (3)

González, 441 (9)

Grant, 9086 (7); 90–00885 (2)

Grayum, 1958, 2426, 2819, 2929 (9); 6738 (3); 7955, 9079 (9)

Grubb, 1314 (3)

Gutiérrez, 20 (3)

Gutiérrez-H, 246 (7)

Hagemann, 81 (2); 369, 641 (3); 1153, 1192 (7); 1261 (3);1865 (3); 2025 (9)

Hahn, 498 (9)

Hamilton, 901, 908 (7)

Hammel, 2003, 2092 (3)

Handro, 1078 (9)

Harley, 50623 (2)

Harling, 809, 4166 (7)

Harris, 7429 (6)

Hassler, 4612 (2)

Hatschbach, 9801 (2); 25799 (9); 31136, 31460 (2)

Haught, 6133 (2); 3163 (7)

Haughton, 1149 (1)

Henkel, 1287 (9)

Henrich, 211 (9)

Herrera, 1377 (9); 1855, 2532 (3); 3221 (9); 3233a (3); 5108 (9); 5239, 5298, 6202, 7857 (3)

Herzog, 2227 (7)

Hinchley, 179 (6)

Hno. Daniel, 1021, 1215 (7); 3277 (2)

Hodge, 16 (5)

Holm-Nielsen, 1366 (7); 3264 (7); 3517 (2); 16171, 18302, 23572, 29352 (7)

Hoover, 1958, 2060 (3)

Huaylla, 1714 (2)

Hutchison, 4818 (7)

Idrobo, 4146 (7); 10298 (3)

Ingram, 1308, 1448, 1825 (9)

Irwin, 15629, 29118, 32893B (2)

Ivey, 292, 327 (3)

James, 13, 109 (9)

Jaramillo, 5778, 7142, 7145 (7); 12234, 14163, 14319 (3)

Jaramillo-Mejía, 2984 (7)

Jenman, 27, 179 (6)

Jimenez, 1052 (2); 2185, 2220, 2256 (9)

Jorgensen, 61898 (7)

Judd, 4517 (7)

Juncosa, 1018 (7)

Jürgens, 61.1, 61a, 144, 144.1 (2)

Kennedy, 3167 (3)

Kessler, 6239, 6264 (2); 6698, 6993 (7); 7395, 7525, 7536B, 7842 (9); 9092, 9147 (2); 459 (7); 9773 (9); 10506 (2); 10507 (7); 10528 (2); 11325 (9); 11515, 11543 (2); 11784 (7)

Killip, 8850, 15798 (7); 16555 (2); 16732, 17190, 19304, 24411, 24414 (7); 25668 (3); 34641 (7); 34648 (3); 38503 (2)

King, 452 (9)

Kirkbride, 1991, 4268 (3)

Knapp, 2488 (3); 7550 (2)

Kress, 91–3359 (9); 94–5110 (3)

Lægaard, 51207 (9)

Langenheim, 3390 (7)

Lawesson, 43444 (9)

Labiak, 2942 (2); 3638 (9); 4236 (2)

Leal, 60 (7)

Lehmann, BT1190 (2)

Lehnert, 1338 (2); 1304, 1423 (3)

Leite, 411, 2758, 3480 (2)

Lellinger, 290 (3); 570 (9); 825, 1276 (3); 1834 (9)

León, 618, 955 (7)

Leonard, 4513 (7)

Lewis, 2382 (7)

Licata, 422 (7)

Liesner, 6407, 6645, 7499 (9); 12995 (7); 14862 (3); 17646, 18597, 23561, 23598, 25826 (9)

Linden, 1922b (6)

Liogier, 13422 (2)

Little, 7826, 7891, 8171, 8568, 8582a (7)

Lloyd, 199A, 336, 351, 357, 753 (5); 4182, 4189, 4250, 4256 (3)

Løjtnant, 11927 (7)

López, 7239 (9)

Luederwaldt, 7844 (2)

Luer, 4941 (2)

Luteyn, 5367, 5453 (7); 6628 (2); 7049, 7255, 7572 (7); 8238 (2); 9731, 9831, 9935, 10620, 10995, 10997 (7); 13161 (3); 13167 (7); 13170 (3)14191 (7)

Maas, 5298 (7); 6858 (9)

Macedo, 3071 (2)

Madison, 2260, 2261, 2550 (7)

Madsen, 7111 (2)

Mägdefrau, 1450 (7)

Maguire, 28489, 33543, 34927 (9)

Martínez, 406 (3); 420 (9)

Marulanda, 511 (7)

Matos, 371 (9)

Maxon, 2274, 2847, 2918, 8611 (6)

McPherson, 8869 (3); 8687, 9655, 15387 (9)

Mejía, 3776 (3)

Melo, 139 (2)

Méndez, 924 (7)

Mexia, 7102, 7188 (3)

Mickel, 2577 (3); 3495 (9); 8258, 8268, 8275, 8392, 8406, 8411, 8449 (7)

Miranda, 170 (9)

Montgomery, 8542 (3)

Mora, 928 (9)

Morales, 1256 (9)

Moran, 4118, 5164 (3); 5179 (2); 5183, 5377 (3); 5836 (9); 5925 (2); 6121, 6243, 6332 (9); 6371 (7); 6711, 6762 (3); 6895 (7); 7418 (3); 7491 (9); 7516 (3) 7627 (9)

Moritz, 122 (2); 315 (7); 316 (2)

Mostacero, 344 (7)

Murillo 132, 737,927 (7); 973 (3); 2112, 2954 (7)

Mutis, 3317 (7)

Navarrete, 1540, 1808 (3)

Nee, 49325 (2); 52309 (7)

Neill, N41, 3249, 3253 (9); 9648 (3)

Nuñez, 711 (2)

Øllgaard, 986 (3); 1293 (7); 1569, 1637 (3); 1891, 2384 (9); 2456 (3); 2476 (9); 2639, 2725, 2892, 3033 (3); 8734, 9361, 9378 (7); 99337 (2); 99968 (7); 99985 (3)

Ortega, 1951, 2260 (7)

Pachón, 60 (7)

Palacio, 66 (7)

Palacios, 22, 4134, 5400, 5697 (3); 6479, 8739 (9); 11414 (3)

Peñuela, 60 (7)

Pipoly, 5128, 10915 (9)

Pittier, 3554 (3); 7404 (2)

Plowman, 940, 4513 (3)

Porter, 4665, 4669, 4673 (3); 4797 (9); 4939b, 4941a, 4942 (3)

Porto, 2113, 3014 (2)

Posada, 282 (2)

Prado, 1099 (7); 1109 (2)

Proctor, 3907 (6); 32242 (9)

Ramírez, 4804 (7); 5349 (2)

Rangel, 5583 (3)

Ranker, 1823 (9)

Regnell, 336 (2)

Reitz, 110, 3972 (2); 5714 (9)

Rieckl, 1823 (9)

Roa, 30 (7)

Rodríguez, 3250 (3); 3272 (2); 3464, 5064 (3); 5226, 5445 (7); 5620 (3)

Rohr, 292, 1059 (2)

Rojas, 406 (3); 591 (9); 616, 1022 (3); 1025 (9); 1040 (3); 1054, 1295 (9); 1629, 1777 (3); 1802, 1827, 2096 (9); 2107, 2218, 2265, 2345, 2441, 2606 (3); 2716 (7); 2795, 2966 (3); 3029 (9); 3278 (2); 3361 (7); 3367 (9) 3999, 4197 (3); 4230, 4545 (9); 4627 (3); 4663 (7); 4824, 4856 (3); 4871 (9); 5105 (2); 5458 (3); 5492 (7); 6050 (2); 6051, 6310 (3)

Romero, 8 (7)

Romoleroux, 2070 (9)

Rueda, 6207, 10552, 10692, 17043 (9)

Ruiz, 54 (7)

Ruiz-Terán, 6124 (7)

Rusby, 298 (2)

Saldarriaga, 27 (7)

Salino, 1780, 1810, 4635, 5196 (2); 5399 (9); 5527 (2); 6480 (9); 6871, 7454, 9260 (2)

Sánchez, 137, 138 (5); 1665, 6001 (7)

Sandeman, 5841 (9)

Santa, 1078 (7)

Saravia, 3019A (7)

Savatier, 1993 (1)

Schultes, 15285, 15739 (9)

Schunke, 136, A145 (9)

Seidenschnur, 127, 128 (3); 137 (9); 155, 164, 168 (3); 173 (9); 175, 191a (3); 194 (9); 202 (3); 261a (7); 280 (3); 281 (9); 381 (9)

Shafer, 592, 3433, 3482, 3669 (5)

Skog, 5042 (9)

Smith, 1707, 1855 (9); 2103 (3); 5133 (9) 5525 (3)

Sodiro, 22 (7)

Soejarto, 3031 (7)

Solomon, 11748, 14956 (2); 4903 (7)

Spannagel, 10 (2)

Sparre, 16526 (2); 16973, 17389 (7)

Spruce, 5230 (3); 2187 (9)

Standley, 36417, 36494, 37767, 37847, 37963 (3)

Stergios, 4253 (9); 17340, 17341, 17474 (7); 20609 (2);

Steyermark, 144 (9); 56989 (2); 110109 (7); 129728, 130312A (9)

Stimson, 5400 (2)

Stones, 2041 (7)

Stork, 9892 (7)

Tate, 940 (2)

Thompson, 7872 (7)

Torres, 19 (7); 96, 2277 (3)

Torres-Rojas, 181 (9)

Tryon, 5309, 6020 (7)

Tuomisto, 7749 (9)

Ule, 265 (7)

Underwood, 479 (7); 1337, 1388, 1619, 2057, 2120, 2144 (6); 2589 (7)

Valeur, 634 (6)

van Cotthem, 1523, 1588 (2); 1708, 1999 (7)

van der Werff, 5939, 5943 (7); 6649, 6877, 7064 (3); 7670 (7); 8745 (2); 9544 (9); 13428, 15821 (3); 16256 (9); 17612 (3)

Vareschi, 5556, 7167 (7)

Vargas, 2365 (3); 2501 (7)

Vasco, 468, 504 (3); 555, 556 (2); 562, 567, 568, 576 (7); 579 (3)

Vásquez, 28869 (7)

Velásquez, 99 (3)

Vélez, 1306 (3)

Vivas, 1452 (9)

Wacket, 114 (9)

Webster, 13417 (5)

Wercklé, 17102 (9)

Werling, 248 (7)

Werner, 278 (3); 1547 (2)

White, 508 (2)

Wiggins, 10991 (7)

Williams, 15338 (9); 19943, 20323 (3)

Woytkowski, 6740, 6741 (7); 7693 (2)

Zanoni, 19347, 20278 (7)

Zardini, 40813 (2)

Zarucchi, 6212 (7)

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Vasco, A., Moran, R.C. & Rouhan, G. Monograph of the Elaphoglossum ciliatum group (Dryopteridaceae). Brittonia 61, 241–272 (2009). https://doi.org/10.1007/s12228-009-9075-y

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