Cattleya

Diversité décrite (Catalogue of Life)

Statut de conservation IUCN (parmi les espèces évaluées)

• EN
  1 (50.0%)
• VU
  1 (50.0%)

Distribution biogéographique

• Brazil (Minas Gerais)2 esp.
• Brazil (Bahia)1 esp.
• Brazil (Pernambuco)1 esp.
• Distribution and habitat: — Cattleya mireileiana is only known from a population of approximately 150 individuals in Alto da Jacuba, in the municipality of Diamantina, in Minas Gerais State (Fig. 2). It was found growing in shrubby vegetation on rocks with some accumulations of organic material (Fig. 1 a). We therefore assume that this species is endemic to this region and that additional fieldwork efforts will be needed to could locate additional populations. Phenology: — Observed flowering between January and February. Conservation status: — Due to incomplete information on its distribution, we have assigned the new species to the category data deficient (DD), according to IUCN criteria (2012). Taxonomic considerations: — Cattleya mireileiana it is similar to C. bradei (Pabst 1973: 332) Van den Berg (2008: 5), C. briegeri (Blumensch. ex Pabst 1973: 367) Van den Berg (2008: 5), and C. cruziana (Castro & Menezes 2015: 29) Van den Berg (2019: 3) both in the vegetative aspect and in the yellow color of its flowers (see comparison in Table 1). However, it is separated from both congeners by the tricolor carina of the lip, reddish violet at the base, then white to the point of insertion of the middle lobe (vs. no white extension in C. bradei, C. briegeri, and C. cruziana) and yellow from this point to the end. Other outstanding features in C. mireileiana are the yellow petals and sepals that become consistently whitish in an extension that goes from approximately the middle of these floral parts to the base (vs. absent in C. bradei, C. briegeri, and C. cruziana). Furthermore, C. mireileiana presents a whitish area on the lip disk, which can be well observed when it is distended. It covers an area corresponding to a semicircle with a center at the base of the distended lip and a radius corresponding to half the length of the lateral lobe. In this aspect, it can be easily separated from C. bradei and C. briegeri, where the white colored lips do not occur, and C. cruziana where some individuals may sporadically present a much smaller whitish area, with radius of at most one fourth of the length of the respective middle lobe (Fig. 3). Cattleya mireileiana can also be easily separated from both C. briegeri and C. cruziana based on the diameter of their flowers, which is 2.5 ‒ 3.0 cm (vs 3.5 ‒ 6.1 cm in C. briegeri; and 4.0 ‒ 4.5 cm in C. cruziana). The column of C. mireileiana has a uniform yellowish green color, both in the external part and in the concave internal part, and in this aspect it is not distinguished from C. briegeri and C. bradei, but it is easily distinguished from C. cruziana which always has the basal part of the dark lilac-violet color column. Regarding the vegetative aspect, C. mireileiana has pseudobulbs formed by only two nodes and is immediately distinguished from both C. bradei and C. briegeri, whose pseudobulbs are formed by three nodes and which, in this aspect, are closer to each other than in C. mireileiana. The four species are aromatic, but their fragrances differ in composition and intensity peaks, with C. briegeri, C. bradei and C. cruziana peaking in the morning and C. mireileiana in the afternoon. In addition to the morphochromatic observations cited above, C. mireileiana features parapatric speciation in relation to C. bradei, C. briegeri, and C. cruziana, which grow in the same macro region, but not in the same rocky outcrops, and occur within an ecological context that substantially differs from that of C. bradei, as it grows in low vegetation that can protect it and provides decomposing plant material. Cattleya mireileiana never occurs on the exposed and bare rocks consistently associated with C. bradei (a notably rupicolous species). Its ecological niche is more similar to that of C. cruziana, which also shows a certain preference for areas with organic matter availability. Another characteristic linked to the ecology of the new species is its preference for areas very close to depressions in the rocks where water can accumulate in puddles during the rainy season, or run in small, semi-permanent rivulets — indicating a greater tolerance for wet or humid environments.1 esp.
• SE-Brazil (Espirito Santo)1 esp.
• Venezuela1 esp.

Régions biogéographiques agrégées depuis Catalogue of Life Cross-References (distribution par espèce déclarative).

Profil de traits agrégé

• cites_rank121 esp.
  SPECIES121
• cites_appendix119 esp.
  II117

  I2
• try_growth_form7 esp.
  herb7
• try_leaf_type7 esp.
  broadleaved7
• try_woodiness7 esp.
  non-woody7

Traits agrégés sur les espèces du taxon (matview taxon_traits_best : WoRMS, FishBase, EBird, GBIF, EOL, TRY…).

Taxons enfants directs (200)

• Genre Brasilaelia
• Espèce Cattleya aclandiae8
• Espèce Cattleya acuensis2
• Espèce Cattleya adelinae1
• Espèce Cattleya alagoensis1
• Espèce Cattleya alaorii6
• Espèce Cattleya alvarenguensis1
• Espèce Cattleya alvaroana3
• Espèce Cattleya amethystoglossa11
• Espèce Cattleya angereri3
• Espèce Cattleya aracuaiensis1
• Espèce Cattleya araguaiensis8
• Espèce Cattleya aromatica1
• Espèce Cattleya attenboroughiana
• Espèce Cattleya bicalhoi6
• Espèce Cattleya bicolor5
• Espèce Cattleya blumenscheinii10
• Espèce Cattleya boissieri
• Espèce Cattleya bradei3
• Espèce Cattleya briegeri3
• Espèce Cattleya calimaniana
• Espèce Cattleya campaccii1
• Espèce Cattleya caulescens12
• Espèce Cattleya cernua21