Nôvo Phyllanthus (Euphorbiaceae) da Amazônia Brasileira

Abstract

Sinopse Minucioso inventário florestal realizado por nós num trecho de mata de terra firme da Reserva Florestal Ducke permitiu-nos encontrar uma série interessante de plantas raras ou novas da Amazônia Brasileira, entre elas a espécie abaixo, que admitimos ser nova para a Ciência.

A Revision of Phyllanthus Section Hylaeanthus (Euphorbiaceae)

“…Comparison of the type specimens of Phyllanthus madeirensis Croizat, in western Amazonia, with specimens from the vicinity of Manaus to the mouth of the Amazon, suggests that the plants belong to a single species. Croizat (1944) described P. madeirensis as having 4 or 5 locules in the ovary, whereas Rodrigues (1971) illustrated P. manausensis as having 3 locules. In fact, locule number is variable; and specimens from western and eastern Amazonia agree in their rather small scarcely acuminate leaf blades conspicuously micropuncticulate abaxially, as well as in their rather large seeds.…”

Phyllanthus chacoensis (Phyllanthaceae): new record for the Brazilian Amazon and its lectotypification

“…Taxonomic advances in the Amazon region are hampered by low numbers of herbaria and deposited specimens, low collection rates, and relatively few specialized taxonomists (Barbosa et al 2003), which helps explain the relatively few studies and the low capacity for determining the real diversity of Phyllanthus (e.g., Rodrigues 1971;Webster 2004;Secco 2013;Secco and Rosário 2015;Secco and Silveira 2016). Additionally, Phyllanthus is one of the most morphologically complex groups of Phyllanthaceae due to its variable habits (herbs to trees), phyllanthoid or non-phyllanthoid branching, and tiny gamosepalous pistillate flowers with disks commonly entire, and disks segmented and alternisepalous in staminate flowers Sales 2004, 2007).…”