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. 2019 Sep 16;257(1):299–317. doi: 10.1007/s00709-019-01438-3

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© The Author(s) 2019

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Micromorphology of O. picridis flowers. a Inflorescence. b Flowers in the anthesis period. Note red stigmas (arrows). c Flowers with glandular trichomes visible on bracts, sepals, and petals. d Sepal with numerous glandular trichomes on its abaxial side. e Fragment of the sepal with glandular trichomes with yellow heads. f Abaxial surface of the sepal with glandular trichomes and stomata (arrows). g Numerous glandular trichomes on the abaxial surface of the petal; st stigma, br bract, se sepals, pe petals. Scale bars = 2 cm (a), 5 mm (b–d), 500 μm (e, g), 100 μm (f)