Phytotaxa 438 (2): 065–079 ISSN 1179-3155 (print edition) https://www.mapress.com/j/pt/ PHYTOTAXA Copyright © 2020 Magnolia Press Article ISSN 1179-3163 (online edition) https://doi.org/10.11646/phytotaxa.438.2.1 Notes on Crocus L. Series Flavi Mathew (Iridaceae) and a new species with unique corm structure ALMILA ÇIFTÇI1,4, DOERTE HARPKE2,5, RACHEL MOLLMAN1,6, HASAN YILDIRIM3,7 & OSMAN EROL1,8* 1 Botany Division, Department of Biology, Faculty of Science, Istanbul University, 34116 Beyazıt, Istanbul, Turkey. 2 Leibniz Institute of Plant Genetics and Crop Research (IPK), 06466 Gatersleben, Germany. 3 Biology Dept, Botany Section, Science Faculty, Ege Univ., Bornova, Izmir, Turkey. 4 �
[email protected]; https://orcid.org/0000-0002-3406-3064 5 �
[email protected]; https://orcid.org/0000-0003-1667-2912 6 �
[email protected]; https://orcid.org/0000-0002-6873-6212 7 �
[email protected]; https://orcid.org/0000-0003-3951-4343 8 �
[email protected]; https://orcid.org/0000-0002-6310-1402 *Author for correspondence Abstract Crocus asymmetricus (Iridaceae) is described as a new species endemic to the southern part of the Anatolian diagonal in Turkey. It is phylogenetically related to C. vitellinus and morphologically to C. antalyensis, but differs from these species in showing an asymmetric corm and a single point of root emergence. Both C. antalyensis and C. asymmetricus are illustrated and compared in this paper. A Bayesian phylogenetic tree of the nuclear rDNA ITS region confirms the affiliation of C. asymmetricus to C. ser. Flavi, and its close relationship to C. vitellinus. A new identification key to the species of C.