A TAXONOMICAL, MORPHOLOGICAL AND CYTOLOGICAL REVISION OF THE GENUS FORMERLY TREATED AS NARDURUS REICHENB. (POEAE, POACEAE) IN IRAN

موقعيت تاكسونومي دو گونه Nardurus subulatus و N. maritimus (اكنون با نام جنس (Vulpia بررسي و بر اساس آخرين طبقه‌بندي‌ها معين مي‌گردد. اين مطالعه بر روي تعداد 30 نمونه هرباريومي و 490 گياه جمع‌آوري شده از سطح ايران بر اساس ويژگيهاي ريخت‌شناسي و سلول‌شناسي انجام شده است. مطالعات سلول‌شناسي 2n=2x=14 را با كاريوتيپ متقارن و كروموزومهاي متاسنتريك براي هر دو گونه نشان داد. گزارش كروموزومهاي گونه Lolium subulatum براي اولين بار است. مشاهدات نشان مي‌دهد كه دو گونه به آساني از همديگر تفكيك مي‌شوند و از طرف ديگر شباهت گونه Loliolum subulatum با گونه‌هاي جنس Vulpia موجب پيشنهاد انتقال اين گونه به جنس Vulpia مي‌گردد.

The taxonomic status of the two species previously treated as Nardurus subulatus (now Loliolum subulatum) and Nardurus maritimus (now Vulpia unilateralis) are reviewed and improved according to the latest classifications for these taxa. A critical study of 30 herbarium specimens and 490 plant individuals collected all around Iran were studied based on the morphological and cytological characters. Cytological analysis showed that 2n = 2x = 14 and all karyotype symmetry indices indicated symmetric karyotypes for both species with metacentric chromosomes. This is the first report on chromosome number of Loliolum subulatum. Two species were clearly separated by morphological data and a close relationship between both species and two species of Vulpia (V. persica and V. hirtiglomis), used as controls, was observed. Regarding high similarity between Loliolum subulatum and the species of Vulpia we propose to transfer this species to the genus Vulpia.