Author: آمنه غلامی 
Astragalus curvifiorus Boiss.
Mohammad Dadmand, Masoumeh Ramezani Yeganeh and Amin Zeraatkar
Natural Resources Gene Bank, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran.
Uploaded at December 2025
Scientific editor: Parvin Salehi Shanjani
Seed Storage
The storage behavior of this species is orthodox (desiccation-tolerant seeds), dry to 15-20% eRH, and store at -20°C.
Germination requirements
The seeds have physical-physiological dormancy and this is related to seed coat and inhibitors. To remove the seed coat, different methods of scarification can be used (sandpaper, sulfuric acid, hot water, etc.). To break dormancy, stratification with pre-chilling (for 14 days), ultrasonic waves, and hormones (Gibberellic acid 100 ppm) are efficient. The best method for breaking dormancy is rubbing the seeds with sandpaper and moist chilling (14 days at 4 °C). Then germinate under a constant temperature of 20 ºC or alternating temperature 25 ºC (16 hours of light) and 15 ºC (8 hours of dark).
Morphology
Fruit type: Pod
Fruit shape: Monolocular, wide ellipsoid, ventral side concave, dorsal side convex, midrib is prominent, narrowed to the apex, stalkless at base, beaked, valves light brown, pubescent
Seed shape: Elliptic, not compressed. Surface glabrous, slightly lustrous, color olive – pale brown
Seed size: Length 3.76 to 5.16 mm, width 2.58 to 3.91 mm in an accession from Marvdasht, Fars, with 1000 seeds weight 24.2 g, which was collected and identified in 2018 by Amin Zeraatkar, and is stored in the Natural Resources Gene Bank of Iran with an accession number 46915.
Average 1000 seed weight: 16.5 to 24.5 g
Biological features
Life form: Perennial, woody, cushion-shaped, spiny, pubescent. Stems ascending, 5 to 25 cm long, covered with remnants of previous years’ petioles
Inflorescence, flower type, and pollination mechanism: Inflorescence lax raceme, many-flowered, with 2 to 5 flowers; flowers hermaphrodite, zygomorphic, papilionaceous, corolla (composed of banner: upper large petal, wings: two petals adjacent to the banner, and keel: two bottom petals) pink, wings as long as the keel. Plant monoecious, cross-pollinated. Pollination is carried out by insects and wind.
Time of flowering: Mid-spring
Time of seed ripening: Late summer
Seed dispersal methods: Seed weight and animals
Geographical distribution: Endemic to Iran. Typus from Jahrom and Darab, Fars
Distribution in Iran: Center and South. Mostly in provinces Fars, Hormozgan, Bushehr
Taxonomy
Family: Fabaceae
Genus: Astragalus
Species: A. curviflorus
Persian name: Gavan
References and Links
Black, M. and Bewley, J.D. 2000. Seed technology and its biological basis. Sheffield Academic Press, 1-419 pp.
Bojňanský, V. and Fargasova, A. 2007. Atlas of seeds and fruits of central and East-European flora: the Carpathian Mountains region. Springer, Dordrecht, The Netherlands, 1046 pp.
Ghahraman, A. Flore of Iran. Research Institute of Forests and Rangelands with University of Tehran Publication. https://floraofiran.net/index.php.
Javadi, H. 2021. Seed: Processing and Quality tests. Agricultural Education & Extension Publishers, 175 pp.
Maassoumi, A.A. 2016. Flora of Iran, Fabaceae (Astragalus II). Institute of Forests and Rangelands Press, Tehran, Iran, Publication No. 85, 504 pp.
Mozaffarian, V.A. 1998. Dictionary of Iranian plants names. Farhange Moaser Publisher, Tehran, 671 pp.
Mozaffarian, V.A. 2012. A Pictorial dictionary of botany. Farhange Moaser Publisher, Tehran, 1088 pp.
Sharma, O.P. 2009. Plant taxonomy 2E. Tata McGraw-Hill Education, New Delh
