A multivariate analysis of the Pitcairnia palmeri group (Bromeliaceae: Pitcairnioideae)

Abstract

A multivariate analysis of the Pitcairnia palmeri group are presented. Principal Components and Cluster analyses were performed in order to have more accurate information to delimit the species. The analyses showed that the specimens referred to Pitcairnia palmeri var. longebracteata are clearly delimited, while those identified as P. palmeri var. palmeri, P. colimensis, and P. compostelae have a greater overlap of morphological characters, but remain as separate entities. A discriminant analysis showed that morphological characters used have significant multivariate differences between the taxa (P < 0.0005), and that the most important variables in the differentiation of these taxa are the percentage of floral bracts that exceeds the length of the sepals, the length of the floral bracts, and the length of the peduncle. We conclude that P. palmeri var. longebracteata is clearly a different species, not a variety, therefore is described and illustrated as P. robert-downsii, and that P. palmeri, P. compostelae and P. colimensis maintain their taxonomic status.

Re-establishment of Aechmea laxiflora (Bromeliaceae, Bromelioideae) based on morphological and phylogenetic evidence, with notes on its geographical distribution

“…Morphometry and morphology of A. bracteata. Different kinds of linear and geometrical morphometric analyses have resulted useful to study the Bromeliaceae family, allowing to elucidate, validate, recognize new taxa, or change the taxonomic status of varieties and synonyms (e.g., Wendt et al 2000, Hornung-Leoni & Sosa 2008, Ferreira et al 2009, de Faria et al 2010, Pinzón et al 2011, Castello & Galetto 2013, Guarçoni et al 2017, Neves et al 2018, González-Rocha et al 2018, Martínez-García et al 2022. In this study, the morphometric cluster analysis grouped the individuals into two clusters, each corresponding to a variety of A. bracteata, according to the characters previously recognized by Beutelspacher (1971) and Smith & Downs (1979).…”

Morphometric analysis provides evidence for two traditionally defined species of the Tillandsia erubescens complex (Bromeliaceae)

“…Morphometric analysis, whether linear or geometric, has proved to be a useful tool to clarify several problems that are difficult to solve with traditional taxonomy (Castillo-Batista et al 2017;De Luna 2020). This is shown by works on plant families with groups of species whose limits are difficult to establish, such as Amaryllidaceae (Gage & Wilkin 2008), Brunelliaceae (Orozco 1991), Brassicaceae (Marhold 1996), Compositae (Hodálová & Marhold 1998), Dipsaceae (Caputo et al 1996), Lamiaceae (Otieno et al 2006), Leguminosae (de la Estrella et al 2009;Egan 2015;Fritsch et al 2009;Mascarenhas et al 2014), Orchidaceae (Ponsie et al 2009;Pedersen 2010;Menini Nieto et al 2019), Solanaceae (Castillo-Batista et al 2017), and Bromeliaceae (Costa et al 2009;Chew-Taracena 2010;Faria et al 2010;Pinzón et al 2011;Castello & Galetto 2013;García-Cruz 2015;Guarçoni & Costa 2017;Neves et al 2018;González-Rocha et al 2018;Uribbe et al 2020).…”

<p><strong><em>Pitcairnia anarosae</em> (Bromeliaceae; Pitcairnioideae) a new species from the state of Oaxaca, México</strong></p>

“…Over the past decade there have been few investigations about the diversity of Pitcairnia L'Héritier (1789: 5; 1790: t. 11) species in Mexico (Espejo-Serna & López-Ferrari 2010, 2015Flores-Argüelles et al 2017;González-Rocha et al 2018). These studies have revealed several new species as well as new distributional records for known species, and clearly indicate that there could be more undescribed species in some unexplored regions of the country.…”