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   The present research is floristic study of Imamverdy, Dartum, Ghapagh, Garivan and Niestaneh villages located in 30 km south of Bojnourd (North Khorassan province) with 1442-1783 m altitude. The aim of study was to identify different species, medicinal plants, endemic, vulnerable and low risk species. For this the specimens were collected during March-November 2012 and identified using Flora of Iran and Flora Iranica. The results showed 133 species from 104 genera and 38 families that one of them belonged to Gymnosperms and 132 species were from Angiosperms. Among them, five families, 13 genera and 18 species were from monocotyledons while 32 families, 90 genera and 114 species were reported from dicotyledons.  Also, 40 medicinal plants were introduced from the studied region. Fabaceae, Brassicaceae, Poaceae, Asteraceae, Lamiaceae were the largest families and Astragalus, Poa, Vicia and euphorbia were reports as the largest genera. Erysimum koelzii, Astragalus khoshjailensis, Eryngium bungei, Acanthophyllum pachystegium, Sclerorachis platyrachis, Taraxacum hydrophyllum were endemic elements for Iran and Astragalus ackerbergensis was vulnerable species. Also, Rubia florida, Mentha longifolia, Fumaria vaillanti and Onopordum carmanicum were introduced as low risk species. The maximum and minimum percentage of chorotype were related to Irano-Turanian with 68.14% and Irano-Turanian, Sahra-Arabian regions with 0.7%. The maximum and minimum percentage of life form were reported for hemicryptophytes with 45.8% and cryptophytes with 3% which this result represented cold and arid climate and uncontrolled grazing in the studied region.
 

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Gypsophila is the fourth biggest genus of Caryophyllaceae. Presence or absence of indumentum on different parts of the plant is one of the most important diagnostic characters between the species of this genus. The indumentum of 13 taxa of this genus were examined using scanning electron microscopy. All taxa had multicellular and glandular trichomes. Size of trichomes can represent as distinguishing trait between morphologically closed species. Although the most important characters in the delimitation of the sections were morphological, trichomes characters were also supportive. The indumentum was constant among different populations of each species except for two species whose glabrous specimens were described here as new varieties: Gypsophila pilosa var. glabra and Gypsophila polyclada var. leioclada

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Gypsophila hispida, sect. Hispidae, is reported for the first time from NW Iran. Illustrations, morphological and palynological descriptions and distribution are provided in detail, along with a key for the six taxa of subgen. Hagenia from Iran.