Tillandsia religiosa Hern.-Cárdenas, González-Rocha, Espejo, López-Ferr., Cerros & Ehlers, a new species from Morelos, Mexico is described and illustrated. The new species is compared to taxa with similar characteristics, T. taxcoensis Ehlers, T. thyrsigera E. Morren ex Baker and T. superinsignis Matuda. Images and a distribution map of the new taxon are included.

RESUMENSe describe e ilustra Hechtia montis-frigidi, nueva especie de Morelos, México. El nuevo taxon se compara con H. chichinautzensis y H. podantha, especies con características similares.Palabras clave: Cerro Frío, complejo Hechtia podantha, Hechtia, Tilzapotla. ABSTRACTHechtia montis-frigidi, a new species from Morelos, Mexico is described and illustrated. The new taxon is compared with H. chichinautzensis and H. podantha, species with similar characteristics.

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.

Tillandsia chalcatzingensis from Morelos, Mexico is described and illustrated. The new species is compared with T. superinsignis, T. thyrsigera and T. tonalaensis, taxa with similar morphological features. A comparative table and a distribution map of these taxa are included. ResumenSe describe e ilustra Tillandsia chalcatzingensis procedente del estado de Morelos, México. Se compara la nueva especie con T. superinsignis, T. thyrsigera y T. tonalaensis, especies que presentan características morfológicas similares. Se incluyen un cuadro comparativo y un mapa de distribución de estos taxa.

Pitcairnia absconditasp. nov., known until now only from the Municipalities of Cabo Corrientes, Mascota, 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 bracts with the apex divergent to spreading (vs. red and appressed) and by the appendiculate at the base chartreuse-green petals (vs. not appendiculate yellow petals). Images and a distribution map of the taxa are presented.