Thirty-nine vascular plant taxa from 33 genera in 18 families are recorded for the first time from Khorassan Province, Iran. All taxa are angiosperms (30 dicotyledons and 9 monocotyledons). Eight o f these taxa are endemic to Iran. All specimens recorded here are deposited in FUMH and/or W, FAR, TARI. This contribution is a continuation to the recently published papers on this province (G h a h r e m a n in e j a d & al. 2005; Joharchi & al. 2007, G h a h r e m a n in e j a d & al. 2009). In these four papers 459 species are recorded for the first time from this province. Furthermore, specimens from Khorassan representing new taxa or new records for Iran published in other papers are listed here. Therefore this series o f four papers serves as Supplement to Flora Iranica for the Khorassan flora.

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