Type: “Hab. in valle Atal Arabiae petreae (Schimp. exs. 192! sub N. coronopifolio), in deserto Tih Palaestinae contermino (Boiss!). Fl. Aprili”.
Lectotypus (designated here): EGYPT: “In valle Atal Arab. petr.”, 27.III.1835, Schimper 192 (G-BOIS [G00332238]; isolecto-: BM [BM001254075], E [E00126655], G [G 00446103, G 00446104, G 00446105], HBG [HBG506145, HBG506236], K [K0000725057, K0000725058, K0000725059], MPU [MPU022356, MPU022357], W [W0075710, W0075711, W18890020447, W18890167962, W18890316262]). Syntypus: EGYPT: “ Arabia petraea, désert du Tih”, III.1846, Boissier s.n. (G-BOIS [G00791848]).
Notes. – Schimper’s syntype collection is designated as the lectotype, instead of Boissier’s unicate, because it is more complete and represented by many duplicates.
The species was reduced by Greuter & Burdet (in GREUTER & RAUS, 1983) to a subspecies of N. coronopifolia (Desv.) Boiss., but the first author believes that it should be maintained as distinct because it is geographically and morphologically distinct.