Ranjbar, M., Rahiminejad, M. R. & Assadi, M.: A contribution to Astragalus sect. Incani (Fabaceae) in Iran. — Willdenowia 35: 117–124. — ISSN 0511-9618; © 2005 BGBM Berlin-Dahlem. doi:10.3372/wi.35.35109 (available via http://dx.doi.org/)
Astragalus masulehensis, a species of the A. refractus group from the province of Gilan, and A. siahbishehensis, a species of the A. askius group from the province of Mazandaran, are described as new to science and illustrated. Keys and tables of diagnostic features are provided. New records of A. refractus and A. rostratus are given from NW Iran, for the latter being an extension of its known range into Iran.