Abstract
A new glandular Mimosa species from Southern Brazil and insights about its glandular trichomes micromorphology
Highlights
Mimosa is one of the most diversified genera among angiosperms, with more than 500 species (Bessega et al 2008; Simon et al 2011)
We described a new species with glandular trichomes, illustrating them by using anatomical features, scanning electron microscopy and histochemical tests
Mimosa baptistae is an aculeate species, which has a glutinous foliage, multijugate leaves, leaflets of all pinnae are inserted alternate along pinna-rachis, having diminute leaflets (1.5–2.6 × 0.9–1.25 mm), presence of glandular trichomes with obconical head and unisseriate stalk on leaflets; subglobose inflorescence, white stamens; and fruits covered by glandular trichomes
Summary
Mimosa is one of the most diversified genera among angiosperms, with more than 500 species (Bessega et al 2008; Simon et al 2011). Most of Mimosa’s diversity is found in Brazil, which is the main center of diversity and endemism of the genus (Simon et al 2011), harboring circa 358 to 366 species (BFG 2015; Flora do Brasil 2020 (under construction) 2018). Since 2006, many new Mimosa species have been described based on differences of its trichomes. Other example is M. myrioglandulosa differing from M. maguirei by its stems with sessile glandular trichomes (Dutra & Garcia 2013b). Additional recently published species, in which indumentum is an important characteristic used to separate taxa, are: M. foreroana (Santos-Silva & Tozzi 2012); M. longistipula (Dutra & Garcia 2013a), and M. urandiensis (Santos-Silva et al 2013)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
