A revision of Centaurea sect. Cynaroides (Asteraceae, Cardueae-Centaureinae) Author Negaresh, Kazem Department of Horticulture, Faculty of Agriculture, Khuzestan Agricultural Sciences and Natural Resources University, Mollasani, Ahvaz, Iran. (* Corresponding author e-mail: negaresh @ ramin. ac. ir) negaresh@ramin.ac.ir Author Rahiminejad, Mohammad Reza Department of Horticulture, Faculty of Agriculture, Khuzestan Agricultural Sciences and Natural Resources University, Mollasani, Ahvaz, Iran. (* Corresponding author e-mail: negaresh @ ramin. ac. ir) & Department of Biology, University of Isfahan, Isfahan 81746 - 73441, Iran. & Department of Horticulture, Faculty of Agriculture, Khuzestan Agricultural Sciences and Natural Resources University, Mollasani, Ahvaz, Iran. (* Corresponding author e-mail: negaresh @ ramin. ac. ir) negaresh@ramin.ac.ir text Phytotaxa 2018 2018-08-02 363 1 448 450 http://dx.doi.org/10.11646/phytotaxa.363.1.1 journal article 10.11646/phytotaxa.363.1.1 1179-3163 13703414 12b. Centaurea gigantea subsp. rechingeri Negaresh , subsp. nov . ( Fig. 28 ) Centaureae giganteae subsp. giganteae affinis , involucro ca. 45× 45 mm (nec 30–35 × (20–) 25–30 mm ), appendicibus phyllorum breviter triangularibus (nec longe triangularibus), spinis terminalibus 2–5 mm (nec 5–13 mm ) longis, pappis ca. 13 mm (nec 8–10 mm ) longis differt. Type :— IRAQ . Prov. Arbil : Qandil mountains between Shahidan and Pushtashan , 1000 m , 28 July 1957 , Rechinger 11013 ( holotype W !) . Involucres convex at base, ca. 45 × 45 mm ; appendages small, concealing a minor part of phyllaries, shortly triangular; spine 2–5 mm long; achenes ca. 8 mm long; pappus ca. 13 mm long. Etymology :—The specific epithet is given in honour of Dr. Karl H. Rechinger who collected the subspecies. Taxonomic and distribution remarks: — Centaurea gigantea subsp. rechingeri is a rare endemic to Arbil Province , NE Iraq ( Fig. 26 ). It is distinguished from another subspecies by having larger capitula and smaller appendages. Chromosome numbers: —Unknown.