Estudio morfolo?gico)' anato?mico en miculas de Nepeta L. (Lamiaceae) del suroeste de Espan?a.
DOI:
https://doi.org/10.24310/abm.v27i0.7305Abstract
RESUMEN. Estudio morfológico)' anatómico en miculas de Nepeta L. (Lamiaceae) del suroeste de España. Se describe la micromorfología y la anatomía de las núculas en las cinco especies de Nepeta L. presentes en el suroeste de España: N. catana L., N. amethystina var. anticaria Ladero & Rivas Goday, N. multibracteata Desf., N. tuberosa L. subsp. tuberosa y N. apuleii Ucria, tanto al microscopio óptico (M.O.) como al microscopio electrónico de barrido (M.E.B.). Los resultados han permitido diferenciar tres tipos estructurales atendiendo básicamente a la ornamentación de la núcula. Además, los caracteres anatómicos han permitido delimitar los taxones estudiados fundamentalmente a nivel del epicarpo, mesocarpo y capa en empalizada. La excreción de mucílago en las núculas de N. amethystina var. anticaria ha permitido diferenciar claramente este taxón. Así mismo, atendiendo a los caracteres carpológicos estudiados, se propone una clave para diferenciar los citados taxones.
Palabras clave. Núcula, morfología, anatomía, mucílago, Nepeta, Lamioideae.
ABSTRACT. Morphological and anatomical studies on nutlets of Nepeta L. (Lamiaceae) from South-West Spain. The micromorphology and anatomy of nutlets of the five Nepeta L. species from South-West Spain: N. ca/aria L., N. amethystina var. anticaria Ladero & Rivas Goday, N. multibracteata Desf., N. tuberosa L. subsp. tuberosa y N. apuleii Ucria, are described with light and scanning electron microscopy. The results have showed the possibility to differentiate three structural nutlet types basically attending of nutlet ornamentation. Anatomical characters have allowed distinguish the examined taxa using epicarp, mesocarp and sclerenchymatic cell layer characters. The mucilage secretion of N. atnethystina var. anticaria nutlet has allowed easily define this taxon. Also, a key to differentiate the five taxa using carpological characters is provided.
Key words. Nutlet, morphology, anatomy, mucilage, Nepeta, Lamioideae.
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