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. 2020 Nov 12;252(6):102. doi: 10.1007/s00425-020-03513-z

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Morphology of the inflorescence and micromorphology of the glandular trichomes of Hartweg's locust. d–j SEM. a Inflorescence with flowers in different stages of development. b Visible inflorescence in the bud stage with bracts covered by glandular trichomes. c Peduncles with glandular trichomes. d Non-glandular (arrows) and massive glandular (asterisks) trichomes with varied length visible on the pedicle surface. e–j Mature glandular trichomes in different stages of activity. e, f, i, j Trichomes in the secretory or post-secretory phases with sunken cells (e, f, j) and with a pore in the cuticle (double arrows) on the head apex (f, i, j). g Non-glandular (arrows) and glandular (asterisks) trichomes with substantially varied length visible on the bract surface. h Trichome in the pre-secretory phase with convex cell walls of the head; He trichome head, St trichome stalk. Scale bars = 10 mm (b), 1 mm (c), 200 µm (d, g), 100 µm (e), 50 µm (f), 30 µm (h–j)