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Original meiotic chromosome counts are presented for nine endemic species in seven families of Angiosperms from Iran including: Arum giganteum GHAHR. (Araceae) (n=14), Caccinia actinobole BUNGE (Boraginaceae) (n=8), Delphinium aquilegifolium (BOISS.) BORNM. (Ranunculaceae) (n=8), Diplotaenia damavandica MOZAFF., HEDGE et LAMOND (Apiaceae) (n=11), Gypsophila caricifolia BOISS. (Caryophyllaceae) (n=17), Iphiona arachnoidea (BOISS.) ANDERB. (Asteraceae) (n=9), Moltkia gypsacea RECH. f. et AELLEN (Boraginaceae) (n=20), Onobrychis gaubae BORNM. (Fabaceae) (n=8) and Onosma platyphyllum RIEDL (Boraginaceae) (n=9). Eight counts are reported for the first time. Furthermore, the previous chromosome count for Iphiona aracnoidea is corrected. Based on cytological data the species status of Moltkia gypsacea is confirmed; it is not merely synonymous with M. coerulea (WILLD.) LEHM. The basic chromosome number n=11 is reported in the genus Diplotaenia for the first time. [ABSTRACT FROM AUTHOR]

Euphorbia acanthodes Akhani is described as a new gypsophilous species from south-west Iran. The affinity, morphological and carpological features, and habitat of the species are discussed. A list of a further 36 interesting endemic species of south-western Iran and adjacent areas is given with notes on their affinities and distribution. These include Centaurea gudrunensis Boiss. & Hausskn., as a new record from Iran. The specific status of Pteropyrum naufelum Al-Khayat is confirmed and it is suggested that P. noëanum Boiss. ex Meisn. is synonymous with P. aucheri Boiss. The biogeographic importance of the so-called ‘Persian foothills’, and biodiversity conservation status of the area are discussed, together with distribution maps of 12 species. It is concluded that the majority of the endemic species in the southern and south-western parts of Iran are Irano–Turanian or have their origins in the Irano–Turanian region. Therefore, it is questionable to consider the area as part of either the Saharo–Sindian, Sudanian or Sudano–Zambezian regions. © 2004 The Linnean Society of London, Botanical Journal of the Linnean Society, 2004, 146, 107–121. [ABSTRACT FROM AUTHOR]

Gypsophila mozaffarianii Negaresh, nom. nov., replaces G. rupestris Mozaff. 1991, which is an illegitimate name as a younger homonym of G. rupestris Turcz. ex Ledeb. 1842. [ABSTRACT FROM AUTHOR]