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Pollen morphology and its taxonomic significance in the tribe Gochnatieae (Compositae, Gochnatioideae)

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Abstract

In the context of recent molecular phylogenies of the basal grades of Compositae, we investigated the utility of pollen morphology within the tribe Gochnatieae. The pollen of 64 species of Anastraphia, Cnicothamnus, Cyclolepis, Gochnatia, Pentaphorus, and Richterago was studied using light microscopy and scanning electron microscopy. In addition, three extra-Gochnatieae genera (Ianthopappus, Leucomeris, and Nouelia) were examined as they were traditionally morphologically related to members of the tribe Gochnatieae. Three of the species of Gochnatieae were examined using transmission electron microscopy. Two pollen types, and two new subtypes, have been recognized on the basis of the pollen shape, size, and exine sculpture. The pollen features of Gochnatia sect. Moquiniastrum and G. cordata are similar and distinctive within the genus and support the recently re-circumscribed section Hedraiophyllum. Within the species with echinate pollen surface, the distinctive spine length of Anastraphia supports its recent resurrection as a genus. The identity of Pentaphorus could not be supported by pollen features as was for other morphological characteristics. The pollen features shared across Cyclolepis, Ianthopappus, Leucomeris, Nouelia and Gochnatia sect. Moquiniastrum, as well as those shared by Richterago and Anastraphia could be a result of parallel evolution.

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Acknowledgments

We are grateful to curators of the herbaria who lent us the specimens studied here. We are also grateful to SEM services of the Facultad de Ciencias Naturales y Museo de La Plata and Palynological Laboratory of the Swedish Museum of Natural History of Stockholm. Support was provided by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina (PIP 02340) and Agencia Nacional de Promoción Científica y Tecnológica (PICT No. 01977).

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Correspondence to María C. Tellería.

Appendix

Appendix

Voucher material examined for the study of pollen. Superscripts refer to Table 1.

Anastraphia attenuata Britton: López Figueiras 2506 (LP)(a); Bisse et al. s/n 50424 (HAJB)(b). A. buchii Urb.: Jiménez & Holdridge 2039 (US)(a); Jiménez 3613 (LP); f8 (US)(b). A. calcicola Britton: del Risco et al. s/n° (HAC 27561). A. crassifolia Britton: Arias et al. s/n° (HAJB 58526). A. cowellii Britton: Howard 5098 (US); Ventosa s/n° (HAJB). A. cubensis Carabia: López Figueiras 1692 (HAC). A. ekmanii Urb.: Ekman 13865 (S)(a); Ekman 16865 (S). A. elliptica León: Valentín Montero 21269 (HAC). A. gomezii León: León 20876 (HAC). A. ilicifolia D. Don: Britton et al. 13981 (US)(a); Bisse et al. s/n° (HAJB 42105)(b). A. intertexta Griseb.: Bisse et al. s/n° (HAJB 41557). A. mantuensis Griseb.: Shafer 11208 (LP)(a); Wright 2876 (HAC)(b). A. microcephala Griseb.: Ekman H-9280 (S). A. maisiana León: La Salle 17576 (HAC). A. montana Britton: Ekman 18725 (S). A. northropiana Combs.: Eggers 4473 (C)(a); Small & Carter 8526 (US); Ventosa, Oviedo & Fuentes (HAC 42615). A. obovata Urb. & Ekman: Ekman 5366 (S) A. obtusifolia Britton: Acuña & Díaz Barreto 17456 (HAC). A. parvifolia Britton: Bisse et al. s/n (HAJB 38075). A. pauciflosculosa Hitchcock: Eggers 3866 (C)(a); Brace 4019 (US). A. picardae Urb.: Ekman 5385 (US). A. recurva Britton: Bisse et al. s/n° (HAJB 21657); Alvarez et al. s/n (HAJB 56472)(a); Acuña 12788 (US). A. shaferi Britton: Bisse et al. s/n (HAJB 35368). A. tortuensis Urb.: Ekman H-4313 (S).

Cnicothamnus lorentzii Griseb.: Maldonado 408 (LP)(a); Cabrera et al. 14497 (LP). Cyclolepis genistoides D. Don: Zardini and Kiesling 114 (LP)(a); Ruiz Leal 4055 (LP). G. arborescens Brandegee:, Keid Moran 9538 (US); Spjut and Edson 6085 (US). G. argyrea (Dusén) Cabrera: Smith et al. 14460. G. arequipensis Sandw.: Eyerden & Beetle 22120 (LP). G. barrosoae Cabrera: Macedo 5574 (US)(a); Cabrera 12313 (LP)(b), Mantovani 503 (LP); Mathes 3 (LP). G. boliviana S. F. Blake: Beck 6264 (LP)(a); Herzog 1757 (LP)(b).. G. cordata Less.: Burkart & Crespo 23169 (LP)(a); 19951 (US)(b). G. curviflora (Griseb.) O. Hoffm.: Jerez et al. 4912 (LP); Fiebrig s/n° (C). G. densicephala (Cabrera) G. Sancho: Assis & Williams 7393 (LP)(a); Glaziou 11072 (K). G. discolor Baker: Claussen 1301 (NY). G. floribunda Cabrera: Roque et al. 281 (LP). G. gardneri (Baker) Cabrera: Gardner 4183 (G). G. hatschbachii Cabrera: Maguire et al. 49149 (US). G. haumaniana Cabrera: Maguire et al. 49194 (US), Rojas 10391 (K). G. magna Cabrera: Cronquist 11277 (NY). G. oligocephala (Gardner) Cabrera: Menezes s/n° (59198 LP). G. orbiculata (Malme) Cabrera: Handro 156 (US). G. palosanto Cabrera: Ventura 9793 (LP)(a); Wood 12696 (US)(b). G. patazina Cabrera: Velande Nuñez 3178 (LP). G. polymorpha (Less.) Cabrera: Harley et al. 26 497 (US)(a); Woolston 808 (S)(b); Blanchet 3251 (LP); Glaziou 3039 (LP). G. ramboi Cabrera: Rambo 51161 (LP). G. rotundifolia Less.: Hoehne 3411273 (US)(a); Brade 5346 (S). G. vernonioides Kunth.: López et al. 3354 (LP)(a); Becker & Torrones 1391 (US); López Sagástegui 3354 (LP). Ianthopappus corymbosus (Less.) Roque & D. N. J. Hind: Palacio-Cuezzo 2304 (LP). Leucomeris spectabilis D. Don: Wallich 1018 (C)(a); Nicolson 3254 (US), Galvola 37 (LP); Nouelia insignis Franch.: Rock 11714 (US)(a); 24253 (US)(b). Pentaphorus foliolosus D. Don: Boelcke 3887 (LP)(a); Marticorena et al. 25217 (LP)(b); Jiles 1693 (S). P. glutinosus D. Don: Simon & Bonifacino 509 (LP)(a); Navarro & Bruno 9228 (S)(b). Richterago amplexifolia (Gardner) Kuntze: Anderson et al. 35940 (US)(a); Almeida et al. 140 (ALBC); R. angustifolia (Gardner) Roque: Roque et al. 1634 (ALCB). R. arenaria (Baker) Roque: Roque et al. 1646 (ALCB). R. caulescens Roque: Roque & Hervencio 440 (US); Roque et al. 1625 (ALCB). R. conduplicata Roque: Roque et al. 1636 (ALCB). R. discoidea (Less.) Kuntze: King et al. 8167 (US)(a); Roque et al. 1900 (ALCB)(b); Warming s/n° (C). R. elegans Roque: Roque et al. 1648 (ALCB). R. polyphylla (Baker) Ferreira: Hatschbach et al. 69634 (ALCB). R. radiata (Vell.) Roque: Smith et al. 14790 (US)(a); Hatschbach 1872 (LP); Almeida 283 et al. (ALCB)(b). R. stenophylla (Cabrera) Roque: Roque et al. 1626 (ALCB).

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Tellería, M.C., Sancho, G., Funk, V.A. et al. Pollen morphology and its taxonomic significance in the tribe Gochnatieae (Compositae, Gochnatioideae). Plant Syst Evol 299, 935–948 (2013). https://doi.org/10.1007/s00606-013-0774-1

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