@article {Vera:1998:0102-3306:121,title = "Anatomia do escapo floral de esp{\’e}cies brasileiras de Paepalanthus subg{\^e}nero Platycaulon (Eriocaulaceae) Anatomy of the inflorescence scape of Brazilian species of the Paepalanthus subgenus Platycaulon (Eriocaulaceae)",
journal = "Acta Botânica Brasílica",
parent_itemid = "infobike://doaj/01023306",
publishercode ="doaj",
year = "1998",
volume = "12",
number = "2",
publication date ="1998-08-01T00:00:00",
pages = "121-133",
itemtype = "ARTICLE",
issn = "0102-3306",
url = "http://www.ingentaconnect.com/content/doaj/01023306/1998/00000012/00000002/art00001",
doi = "doi:10.1590/S0102-33061998000200003"
abstract = "Foi estudada a anatomia dos escapos de 17 esp{\’e}cies de Paepalanthus subg{\^e}nero Platycaulon, sendo 10 da sect. Divisi e sete da sect. Conferti. O trabalho foi realizado para caracterizar anatomicamente os escapos. como contribui{\c{c}}{\~a}o para o entendimento do grupo, uma vez que. morfologicamente, esse {\’e} o car{\’a}ter laxon{\^o}mico mais importante. Procurou-se, tamb{\’e}m, confirmar ou n{\~a}o o reconhecimento das duas se{\c{c}}{\~o}es dentro do subg{\^e}nero. Para os estudos anat{\^o}micos utilizou-se material proveniente do Brasil, obtido de exsicatas de diferentes herb{\’a}rios e/ou coletado na Serra do Cip{\’o}, MG. Neste trabalho observou-se que Paepalanthus subg. Platycaulon {\’e} caracterizado morfologicamente por apresentar escapos pluricapitulados no {\’a}pice. Anatomicamente, as esp{\’e}cies estudadas da sect. Divisi apresentam escapos com v{\’a}rios cilindros vasculares, na regi{\~a}o mediana e, ainda apresentam, em Paepalanthus vellozioides e P. spixianus, feixes vasculares corticais, caracter{\’ı}sticas {\’u}nicas na fam{\’ı}lia. Diferentemente, as esp{\’e}cies avaliadas da sect. Conferti apresentam escapos com cilindro vascular {\’u}nico na regi{\~a}o mediana, padr{\~a}o an{\’a}logo ao das demais Eriocaulaccae, e ainda apresentam, em Paepalanthus itatiaiensis, P. planifolius e P. paulensis, feixes vasculares medulares, que at{\’e} ent{\~a}o n{\~a}o haviam sido referidos para a fam{\’ı}lia.The scape anatomy of 17 taxa of Paepalanthus subgenus Platycaylon were studied, being 10 taxa of sect. Divisi and seven of sect. Conferti. The study was carried out to see whether scape morphology and anatomy provide valid taxonomic characters at the subgeneric level in Paepalanthus and to lest a proposal to recognize two sections within Paepalanthus subgenus Platycaylon: sect. Divisi and sect. Conferti. The material for anatomical study was collected in Brazil, partly from herbarium specimens and partly from fresh material collected in the field, from the Serra do Cip{\’o}. Minas Gerais State. In this work, we observe that Paepalanthus subg. Platycaulon is characterized morphologically by its pluricapitulate scapes. Anatomycally, the studied species of the Divisi sect, are characterized by having separate vascular cylinders, and present cortical vascular bundles in Paepalanthus vellozioides and P. spixianus, being these characteristics unique to the family, while the scapes of the studied members of sect. Conferti display a continuous vascular cylinder, which is analogous with other groups within the Eriocaulaceac, and present pith vascular bundles in Paepalanthus itatiaiensis, P planifolius and P. paulensis, characteristics unique to the family.",
author = "Vera Lucia Scatena and Ana Maria Giulietti and Vanessa de Aquino Cardoso",
}