Abstract
Microlicia gracilis and Microlicia xylopodifera, endemic to Chapada dos Veadeiros, Goiás State, Brazil, are described, illustrated and the conservation status is also provided. Both species resemble Microlicia ordinata and Microlicia ramosa that are also endemic to Goiás, by having sessile leaf with serrate and ciliate margin, pedicellate flower, triangular and short sepal and dimorphic stamens with bicolorous and polysporangiate anthers. However, M. gracilis differs by the long internode (2–4 mm long), concolorous, semi-amplexicaul and lanceolate leaf, and petal acuminate at the apex. Microlicia xylopodifera differs in having a robust xylopodium, horizontal or slightly ascending leaf and a dense crown of glandular trichomes at the apex of flower bud.
Highlights
IntroductionMicrolicia D.Don is a Brazilian genus with 166 species exclusive to Brazil (Flora do Brasil 2020) and with only 11 species occurring in Bolivia, Peru, Venezuela and Colombia (Renner 1993; Rull 2003; Romero 2003a; Michelangeli and Cotton 2008; Romero and Woodgyer 2015; Mendoza-Cifuentes et al 2019; Pacifico et al 2020a; Versiane et al 2020)
Using the key to the species of Microlicia of the Chapada dos Veadeiros National Park proposed by Diniz and Silva (2019), M. gracilis and M. xylopodifera should be positioned close to M. latifolia D.O.Diniz & M.J.Silva since they have branch, leaf, hypanthium and sepal covered by setose trichomes and spherical glands, sessile and concolorous leaf blade, 2(–3)-veined, with serrate and ciliate margin, pedicellate flower, pink petal and stamens with bicolorous and polysporangiate anthers
Microlicia gracilis bears some resemblance to Microlicia xylopodifera in having sessile leaf with a lax arrangement on the branches, pedicellate flower, urceolate hypanthium, dimorphic stamens with bicolorous and polysporangiate anthers
Summary
Microlicia D.Don is a Brazilian genus with 166 species exclusive to Brazil (Flora do Brasil 2020) and with only 11 species occurring in Bolivia, Peru, Venezuela and Colombia (Renner 1993; Rull 2003; Romero 2003a; Michelangeli and Cotton 2008; Romero and Woodgyer 2015; Mendoza-Cifuentes et al 2019; Pacifico et al 2020a; Versiane et al 2020). At least 20 species of Microlicia in the State of Goiás occur in the Chapada dos Veadeiros (Naudin 1845; Cogniaux 1883; Pilger 1903; Smith 1955; Wurdack 1959; Almeda and Martins 2001; Romero et al 2017; Diniz and Silva 2019). In the course of preparing a taxonomic treatment of Microlicieae for the State of Goiás, some collections from Chapada dos Veadeiros could not be recognised under any name in the genus and so we concluded that these collections refer to two new undescribed species. The new species are described, compared morphologically with similar species and information about geographic distribution and conservation status is provided, as well as images of morphological structures of the two species
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