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Lamiaceae is associated with square stems, opposite leaves, two-lipped flowers, and glandular hairs containing volatile oils. Solanaceae has five-part, radially symmetrical flowers and includes plants with potent alkaloids, making careful identification important. Fabaceae (Papilionoideae) is characterized by a standard, wings, and keel in the corolla, while Zingiberaceae is recognized by aromatic rhizomes and distinctive leaves and floral structures. Apiaceae commonly has compound umbels and fruits with oil canals. For crude drug authentication, stem cross-section, leaf arrangement, and inflorescence type offer useful morphological clues; chemical profiles can provide additional evidence. Scientific naming and traceable herbarium vouchers support consistent identification, while appropriate authentication helps reduce substitution and confusion with toxic look-alikes.