Saturday, May 20, 2023

[Botany • 2022] Cattleya mireileana (Orchidaceae: Laeliinae) • A New Species from the Southern Espinhaço Complex, Minas Gerais State, Brazil


Cattleya mireileana Menezes, Giordani & Mendes, 

in Menezes, Giordani et Mendes, 2022. 

This study describes and illustrates Cattleya mireileiana (Orchidaceae: Laeliinae), a new species endemic to the Southern Espinhaço Complex near Diamantina, Minas Gerais State, Brazil, where it was found in a few isolated rocky outcrops, sharing habitat with Cattleya rupestres. It is close to three other species: Cattleya bradei, C. briegeri, and C. cruziana. However, the new species differs in the number of nodes present in the pseudobulb components, the size of the diameter, the scent of the flowers and the time of flowering. In addition, its flowers have two unique chromatic characteristics that distinguish it from all other species with yellow flowers in the Parviflorae series: the color of the carinae and the whitish area at the base of the petals and sepals. We provide a detailed morphological description, a distribution map, in situ photographs, and compare it with similar species. We assessed its state of conservation as data deficient  (DD), as the only know population consists of at least 150 mature individuals and is outside of an environmentally protected area.

Keywords: Taxonomy, Diamantina, Orchid, Saxicolous, Campos rupestres, Monocots


Cattleya mireileana.
a. Habitat; b. Habit; c. Petals and sepals; d. Flower; e. Peduncle/column/labellum in side view; f. Labellum in frontal flat view; g-h. Labellum in exploded planar view; i. Column in ventral view; j. Column in side view; k. Anther cap and pollinarium.
(Photos by Euler Menezes).

Cattleya mireileana Menezes, Giordani & Mendes, sp. nov.

Cattleya mireileana E.L.F.Menezes, Giordani & J.C.R.Mendes

Euler Da Luz Fernandes Menezes, Samuel Cunha Oliveira Giordani and Jone Clebson Ribeiro Mendes. 2022. Cattleya mireileiana, A New Species of Orchidaceae (Laeliinae) from the Southern Espinhaço Complex, Minas Gerais State, Brazil. Phytotaxa. 541(3); 270-276. DOI:  10.11646/phytotaxa.541.3.6