M. xanthocentra aerial parts, out of the flowering season, were
collected at the Private Natural Heritage Reserve SESC Pantanal
(168410 13.0800S; 568100 29.8900W, Mato Grosso, Brazil). A voucher
specimen (UPCB 48062) was deposited in the Herbaria UPCB at
Universidade Federal do Parana´ (Brazil), after identification by Dr.
Raquel Rejane Bonato Negrelle