Figure - available from: Phytokeys
This content is subject to copyright. Terms and conditions apply.
Flower dissected and detail of the inflorescence A, BPitcairnia abscondita (A. Flores Argüelles et al. 1189) C, DP. imbricata (A. Espejo et al. 7271) E, FP. wendlandii (M.I. Mejía-Marín et al. 146). Photo credits: A. Espejo-Serna.
Source publication
Pitcairnia abscondita sp. nov., known until now only from the Municipalities of Cabo Corrientes, Mas-cota, Puerto Vallarta, San Sebastián del Oeste and Talpa de Allende in the State of Jalisco, Mexico, is here described and illustrated. The new taxon was confused with P. imbricata for long time, but differs from this species by its green floral bra...
Citations
... Such rupicolous bromeliads must not only be tolerant to water stress, since the species that inhabit rocky substrates in locations with high elevations, are also exposed to other factors, such as the duration of insolation, the intensity of irradiation, the diurnal oscillation of temperature and relative atmospheric humidity, and the increase in atmospheric transparency (Rzedowski 2006). The rocky areas present in this region can cause a geographic isolation between populations that limits pollen and seed dispersal, which could have promoted speciation in some genera with many micro endemic species like Pitcairnia (Flores-Argüelles et al. 2022b) or the presence of species with disjunct populations as in the case of Ursulaea tuitensis (Mota et al. 2020). ...
Background:
Bromeliaceae are widespread in Mexico and present in all types of vegetation. A high number of species are restricted to the country. Jalisco is the fifth Mexican state regarding Bromeliaceae richness and 18 % of its species are state endemics.
Questions and / or Hypotheses:
How bromeliads are distributed in Western Sierra-Coast region of Jalisco? What is the endemism status of bromeliads in the region?
Studied species:
Native Bromeliaceae of WSC.
Study site and dates:
WSC region in Jalisco, collections from 1926 to 2020.
Methods:
Data were obtained by herbarium material revision and field expeditions. We analyzed life form, distribution by vegetation type, altitudinal range, and recollection activity per year. A richness map was generated. To determine the affinity of the bromeliad flora with other regions of the state, a cluster analysis was performed using UPGMA method.
Results:
We found nine genera and 53 species, richest genera were Tillandsia and Pitcairnia. Epiphyte was the commonest life form. Oak forest had the highest species number, most taxa were found between 250-750 m asl. Most collections come from the municipality of Cabo Corrientes accounting for 66 % of total species in WSC. The study area hosts six species of endemic bromeliads.
Conclusions:
Despite to their restricted distribution, none of the endemic species from WSC are listed under special protection. The WSC should be considered for conservation. The tourism development, deforestation and climate change could have a negative impact on bromeliads, especially epiphytes that depend entirely on the host trees.
