tailieunhanh - Isatis L. (Brassicaceae) in Iran: A new record and a new synonym

Isatis takhtajanii Avestisian is reported as a new record from western Iran. It is close to I. tinctoria L.; a list of diagnostic differences is provided. A more complete description of I. takhtajanii and a distribution map are given. | Turk J Bot 32 (2008) 243-247 © TÜB‹TAK Research Note Isatis L. (Brassicaceae) in Iran: A New Record and a New Synonym Hamid MOAZZENI1, Shahin ZARRE1,*, Hosein MAROOFI2 1 Department of Botany, School of Biology, College of Science, University of Tehran, PO Box: 14155-6455, Tehran - IRAN 2 Research Centre of Agricultural and Natural Resources of Sanandaj, PO Box. 66169-36311-714, Sanandaj - IRAN Received: Accepted: Abstract: Isatis takhtajanii Avestisian is reported as a new record from western Iran. It is close to I. tinctoria L.; a list of diagnostic differences is provided. A more complete description of I. takhtajanii and a distribution map are given. Isatis koeiei . is reduced to a synonym of I. raphanifolia Boiss. Iranian records of I. spectabilis Davis and I. tinctoria subsp. tomentella (Boiss.) Davis are considered to be misidentifications of I. kotschyana Boiss. & Hohen. Key Words: Isatis, Brassicaceae, new record, new synonym, Iran Introduction The genus Isatis L. (Brassicaceae/Cruciferae), with some 79 species (Al-Shehbaz et al., 2006), is, for taxonomists, one of the most intractable cruciferous genera in the Near East and is often represented in herbaria by inadequate material (Davis, 1964, 1965; Hedge, 1968; Appel & Alshehbaz, 2003; Al-Shehbaz et al., 2006). In addition, due to the extreme variability in all morphological characters, the limits of many species are uncertain. Most if not all diagnostic characters used in earlier classifications are very variable and because of the unreliability of vegetative and floral characters it is difficult or impossible to identify many specimens when mature fruits are absent (Davis, 1964). The patterns of variation suggest that hybridisation may be widespread (Davis, 1965). Some botanists (Davis, 1965; Hedge, 1968) have suggested that many of these problems can probably only be solved with the aid of more detailed field observations and comprehensive field notes. .