Marrubium zeydanlii (Lamiaceae), a new species from Turkey

Marrubium zeydanlii (Lamiaceae) is described as a new species from Turkey. It is similar to M. depauperatum and M. sivasense; however, it is distinguished from M. depauperatum by having lanate hairs on the stem, oblanceolate dentate leaves, 4–6-flowered verticillasters. It is also distinguished from M. sivasense by having lanate hairs on the stem, oblanceolate leaves, and shorter petals. The pollen grains are radially symmetrical and isopolar, the shape is oblate-spheroidal with the polar axes 16.7–20 µm and the equatorial axes 17.6–19.3 µm. trnL-F region was used to identify the phylogenetic position of the newly described species.