Observaciones micromorfolo?gicas y anato?micas en nu?nulas de Prunella L. y Cleonia L. (Lamiaceae) del suroeste de Espan?a.
DOI:
https://doi.org/10.24310/abm.v29i0.7230Abstract
RESUMEN.Observaciones micromorfológicas y anatómicas en núnulas de Prunella L. y Cleonia L. (Lamiaceae) del suroeste de España. Se han estudiado las núculas de tres especies del género Prunella y una del género Cleonia, tanto al microscopio óptico como al electrónico de barrido. Los taxones de ambos géneros se diferencian fácilmente tanto mediante caracteres morfológicos como el contorno o la ornamentación, como por caracteres anatómicos como la morfología de las células esclerenquimáticas del mesocarpo. La excreción del mucílago también contribuye a esta diferenciación. Otros caracteres como el color, la presencia o ausencia de glándulas, o algunas diferencias en el mesocarpo o endocarpo permiten diferenciar las tres especies examinadas del género Prunella. Por último, se discute brevemente la utilidad del mucílago, así como los sistemas de dispersión más frecuentes.
Palabras clave. Núcula, morfología, anatomía, mucílago, Prunella, Cleonia, Lamiaceae
ABSTRACT. Micromorphological and anatomical observations on nutlets of Prunella L. and Cleonia L. (Lamiaceae), from the SW of Spain. The nutlets of three species of Prunella and another of Cleonia have been studied with light and scanning electron microscopy. The taxa of both genera can be easily differentiated through both morphologic features, such as the outline or the ornamentation, and anatomic features as the morphology of mesocarp’s sclerenchymatic cells. The mucilage secretion also contribute to this differentiation. Other features such as colour, presence/absence of glands, or some differences in the mesocarp or in the endocarp allow to distinguish the three examined species of genus Prunella. Lastly, the usefulness of mucilage and the most frequent dispersal systems are briefly discussed.
Key words. Nutlet, morphology, anatomy, mucilage, Prunella, Cleonia, Lamiaceae
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