The genus Mitreola (Loganiaceae) in Mexico
Por:
Sofia Islas-Hernandez, C., Ochoterena Booth, Helga, Valencia-Avalos, Susana, Alvarado-Cardenas, Leonardo O.
Publicada:
1 ene 2019
Resumen:
Background and Aims: Loganiaceae is a group of tropical plants, which
have been poorly studied in Mexico. Some of the taxa are little known in
terms of their taxonomy and distribution, such as the genus Mitreola,
where additionally some of the species have nomenclatural problems. This
work focuses on a taxonomic review of Mitreola petiolata and solves the
nomenclatural problems that the species has had over the years.
Methods: A review of specimens in different herbaria was carried out,
specialized literature to obtain descriptions and taxonomic keys, the
number of species of the genus and their distribution, as well as the
circumscription and nomenclatural problems of the taxon. To obtain the
palynological data, material from mature flowers was acetylated and
revised with the scanning electron microscope. From these data an
evaluation of the conservation situation was obtained.
Key results: Mitreola petiolata has a pantropical distribution and is
the only species of the genus present in the country, growing from
Tamaulipas and Sinaloa to the Yucatan Peninsula. In spite of the
morphological variation of structures such as the leaves or the lobes of
the capsule, the characters of taxonomic importance (dichotomic
inflorescence, subsessile flowers and stamens inserted close to the base
of the corolla) remain constant. A review for M. petiolata, a
dichotomous key, data on its distribution and conservation status in the
country is provided. Detailed information on the micromorphology of
pollen grains is presented, the first made for the species. The category
of Least Concern is suggested, due to its wide distribution.
Conclusions: The constant revision and curation of biological
collections, keeps knowledge of taxa updated. This is the case of
Mitreola petiolata, for which an update of its systematics, distribution
and state of conservation is provided.
Filiaciones:
Sofia Islas-Hernandez, C.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Comparada, Lab Plantas Vasculares, Apdo Postal 70-282, Cd Mx 04510, Mexico
Ochoterena Booth, Helga:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apdo Postal 70-367, Cd Mx 04510, Mexico
Valencia-Avalos, Susana:
Univ Nacl Autonoma Mexico, Fac Ciencias, Herbario Nacl FCME, Apdo Postal 70-282, Cd Mx 04510, Mexico
Alvarado-Cardenas, Leonardo O.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Comparada, Lab Plantas Vasculares, Apdo Postal 70-282, Cd Mx 04510, Mexico
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