Micromorphology and structure in fruits of Bulbostylis (Cyperaceae) and their systematic value in Southern America species.
DOI:
https://doi.org/10.31055/1851.2372.v52.n1.16909Keywords:
Southern America, anatomy, achenes, Bulbostylis, Cyperaceae, SEM/EDX, micromorphology.Abstract
Micromorphology and structure in fruits of Bulbostylis (Cyperaceae) and their systematic value in Southern America species. The genus Bulbostylis Kunth includes about 150 species that inhabit tropical and subtropical areas worldwide. In Bulbostylis, as in other kinds of sedges, the exomorphology of fruits is one of the steadiest characters for infrageneric classification. This research was focused
on evaluating achene micromorphology in twenty Bulbostylis species of Southern America (Argentina, Chile, Paraguay, Uruguay and Paraná, Santa Catarina and Rio Grande do Sul in Brazil). Based on studies with optical and scanning electron microscopy, several groups are proposed, considering the micromorphology of the achenes and presence and type of silicophytoliths. Chemical microanalysis of
fruits with EDX/MEB was also performed. The description system based on exomorphological characters, applicable to fruits and seeds, is updated.
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