Petiole Anatomy of 21 Representatives of Tribe Alysseae (Brassicaceae) from Turkey

This paper presents in detail petiole anatomy of 21 representatives of tribe Alysseae, 5 of which are endemic from Turkey. In the examined taxa, differences have found in the petiole shape, arrangement and number of vascular bundles, and the presence of collenchyma. Petiole shapes are in sulcate, circular, or flat types. The most common type is sulcate with blunt or acute margins. The epidermises are in 1, 2 or more layer. The number of vascular bundles in the examined taxa varies between 1 (Berteroa mutabilis) and 9 (Alyssum strictum and A. strigosum subsp. strigosum) in total. In addition, vascular bundles in the middle are broadly or narrowly arc-shaped with 1-5 lobed. These results display that the compared petiole anatomical characteristics among the examined taxa are somewhat suitable to their delimitation in traditional rank in the Flora of Turkey.

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