Open Access Open Access  Restricted Access Subscription or Fee Access

Micromorphological features revealing two new species of Portulaca (Portulacaceae) from Brazil, segregated from P. hirsutissima

THAÍLA VIEIRA A. SANTOS, ALEXA ARAÚJO DE O. PAES COELHO, MARCOS DA COSTA DÓREA, FRANCISCO DE ASSIS R. DOS SANTOS, KELLY REGINA B. LEITE, REYJANE PATRÍCIA OLIVEIRA

Abstract


Portulaca hirsutissima (Portulacaceae) is a succulent herb occurring in open fields, sandy or rocky soil of separate Brazilian areas. On the basis of the analyses of seeds and pollen grains macro- and micromorphology, a significative variation, which is related to the distribution pattern, was found. Two new species are here proposed, described and illustrated. Portulaca giuliettiae sp. nov. occurs in Eastern Brazil, from Paraiba to Rio de Janeiro and P. goiasensis sp. nov. is restricted to the Chapada dos Veadeiros, in Central Brazil. P. hirsutissima is now to be considered as a restricted species from Minas Gerais State. A lectotype for the name P. hirsutissima is designated from a specimen preserved at P.


Keywords


Pollen grains, Portulaca giuliettiae, P. goiasensis, seed ornamentation, SEM, taxonomy, Eudicots

Full Text:

PDF (2MB)


DOI: http://dx.doi.org/10.11646/phytotaxa.270.2.3

Refbacks

  • There are currently no refbacks.


ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand