Astragalus ferdowsi-toosii (sect. Dissitiflori, Fabaceae), a new species from Northeastern Iran

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Abstract

Astragalus ferdowsi-toosii is described and illustrated as a new species from Zarnikh Mountain, Khorassan-Kopet Dagh Floristic Province, Iran. Based on a number of morphological features, such as bifurcated hairs, free stipules, imparipinnate leaves, and missing bracteoles, the new species belongs to the Astragalus sect. Dissitiflori. Notes on its taxonomy, distribution, and ecology as well as evaluation of conservation status are provided.

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About the authors

F. Ghahremaninejad

Kharazmi University

Author for correspondence.
Email: fgh@khu.ac.ir
ORCID iD: 0000-0001-5860-9976
Iran, Islamic Republic of, 49, South Mofatteh Ave., Tehran, 15719-14911

M. R. Joharchi

Ferdowsi University of Mashhad

Email: joharchi@um.ac.ir
ORCID iD: 0000-0003-3714-2523
Iran, Islamic Republic of, Azadi Square, Mashhad, Razavi Khorasan Province, 9177943354

F. Memariani

Ferdowsi University of Mashhad

Email: memariani@um.ac.ir
ORCID iD: 0000-0001-5478-1859
Iran, Islamic Republic of, Azadi Square, Mashhad, Razavi Khorasan Province, 9177943354

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2. Fig. 1. Astragalus ferdowsi-toosii in its natural habitat. A – inflorescence; B – close-up view of a flower; C – Zarnikh Mount where very few populations of A. ferdowsi-toosii are found in the montane steppe vegetation.

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3. Fig. 2. Holotype specimen of Astragalus ferdowsi-toosii (Joharchi 45225-FUMH) collected from Zarnikh Mount, NE Iran.

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4. Fig. 3. Some details of morphological characters in Astragalus ferdowsi-toosii. A – stipules and their black hairs; B – a leaflet with white dense bifurcate hairs; C – black densely hairy floral bracts; D – calyx teeth with dense black hairs; E – calyx tube with spreading, basifixed white and few black mixed hairs; F – dissected floral parts.

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5. Fig. 4. Distribution maps of Astragalus ferdowsi-toosii. A – Geographical position of the study area and location of A. ferdowsi-toosii populations (blue circles) in Kashmar-Torbat mountain range, southern part of Khorassan-Kopet Dagh floristic province, NE Iran; B – GeoCAT distribution map of the species, and estimation of Extent of Occurrence (EOO) and Area of Occupancy (AOO), with maximum distance of 4.5 km between pairs of points, based on IUCN Red List Criteria.

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