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SEM micrographs of development of glandular trichomes of V. romanetii. (A–C) Glandular heads without apparent stalks. (D) Young glandular trichome with short stalk. (E) Mature glandular trichome with long stalk. Scale bars: (A) = 20 μm; (B) = 50 μm; (C) = 20 μm; (D) = 50 μm; (E) = 100 μm.
