Un esame comparativo dei microcaratteri delle infiorescenze di Arnica montana, Calendula officinalis ed Anthemis tinctoria per mezzo del microscopio elettronico a scansione, ha permesso di stabilire che a livello delle superfici epidermiche abassiali di brattee involucrali e ligule, nonché a livello dell'epicarpo degli acheni, sono presenti particolarità che consentono l'identificazione delle tre specie anche disponendo di campioni di droga polverizzata.
Referenze Bibliografiche
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