Systematic Revision and Phylogeny of Paspalum Subgenus Ceresia (Poaceae: Panicoideae: Paniceae)

Abstract

AjiSriiACI'r\v ('nt\-(i\(' sppt'ies are tit'aU'<l in lliis work, in uhiili cMinioipliolo^^ical ciiaraders arc analv/cd cladislifally. Sprcies (»f l\tsp(tlum suh^. Cerrsia arc characlerized In llicir ri^^id. (ililorni to lanccolalc Mades, indorcscfncc-s with one In sf\t'ral racemes, raehis of the raeetnes winged and hvalini-to nieniltranous, spikel<'ts pilose, oeeasionally glaI)rou.s, with tlie npper antlieeiuni jtale. hvaliiie to nwnihranons. oeeasionallv eliartaeeons, and die uf>[)(M-h-ninia not enclosing llu-t4> of the upper palea. Speeies ^rovs in Soutli Aineriea from Mexico to Argentina and Uruguay. A ehulistic analysis of suhgenus Crrrsia was conducted iu test its nionophyly. and to eslahlish ils relaliorislii[) willi other groujis u{ PasfHilum. A key to the speeies in sul)genus Crrrsia is given, as well as nior[)hoh)gical desi-riplion and illustration, and dislrihulion maps. kry fvifnls: America, Crrrsia, eladislies, Paspalnm. [\taeeae. /^/.s/>^////;n I., iiuludes a])[)roxiiiiat(dy 330 speeies ///// .suLg. Ceresia, eonsideniig; ve*i;etati\e and re- (lislril)ule(l in Lropieal and suhhopieal regions of prodnelive characters, analyzing hahilal and distri-Arn<'rica, with a few taxa growing in the Old World hution range. A cladi.slic analysis was furdicr p<^r- (Claylon & Kcnvoize, 19{56). Dne to its large iiuin-lornied in order to Icsl the monophyly of the bcr of s()ccies, and the tnorphidogical variali<»n snhgenus and to estahlisli the relationships of its present within the g(MUJs, PdsjHihim has been divided into suhgenera. sections, or iidornial groups mainly on the basis of morphological characters, such as infloresctMice type or features of the spikelet (Nees. 1829: Doidl. ir»77: Chase. 1927: Pilger. 1929 Clayton .^ Kenvoize, 19J56; Morrone ct ah. 1995 Morrone ct ah. , 1996, 2()()(); CialdeHa el ah, 1995). species llisiomCerrsia was estahlisluMl a! the g;enerle level hy Persoon (lo05-lo()7). on the basis <»f C. clci^dDs (P dspdhim memfmnHicciun Lam., non Walt., 17oo). StibscHjuenlly, Kcichetd)acdt treated Ccrcsia as a Chase (1929) divided Paspalum into subgenera subgenus of Paspalum (Chase, 1929). Several spe-Paspalum and Ccrcsia (Pers.) I{chb., characterizing ries were described in Cercsia in the 19th cenliny (riiigge, 1810; Trinius, 1826 Trinius, . 1828 Trinius, -1836 Ne(^s, 1829; Doell, 1877). N<M^s (1829) considered, within Paspahnn, sec-liiHi Di^ilaria, in<duding P. pcciinaliuf} and species cmrently treated in Axonopus; section Ijinif^cri, in-the latter b\ its foliaceous ra<diis. with one to several raci'ines per inflorescence and s])ikelets dens<'ly pilose, with long white hairs. mainl\ along tlum aigins of the upp<M-glume ami lower h^mma. Taxonomie sttidies in Ccrcsia are fragincntary; VNith respect to the subgerms, llu^se Paspahim spe-(haling P cmomimu l\ ^utlaiiun, R crianthunu P. ei(^s havt^ been analyzed in regional works in floral san^itinolcnlnm, P ammodcs, P polyphyllunK and /' Ucpharophoruiu (= P. polyphylliim): ami sections

Novos sinônimos e ocorrências em Paspalum L. (Poaceae)

“…No entanto, estudos preliminares sugerem que, para não ser mantido em parafilia, Paspalum deveria incluir as espécies de Thrasya Kunth (Giussani et al 2001, Denham et al 2002.…”

Chromosome numbers and meiotic behavior of some Paspalum accessions

“…The genus Paspalum (L.), one of the most economically important grass genera of the Paniceae tribe, includes approximately 330 species distributed in tropical and subtropical regions of America, with a few taxa growing in the Old World (Denham et al, 2002). A large number of Paspalum species provide excellent grazing in native grasslands of the warm regions of South America (Bonilha and Quarín, 1997) and several members of the genus are also used as turf grass and for ornamental purposes (Burson and Bennett, 1971).…”

A tribo Paniceae s.l. (Poaceae: Panicoideae) na Reserva Biológica de Mogi-Guaçu, SP, Brasil

“…Distribuição: endêmica do Brasil. Ocorre nas regiões Centro-Oeste, Sudeste e Sul, exclusivamente em áreas de Cerrado (Denham et al 2002, Valls & Oliveira 2014.…”