Onopordum nezaketianum sp. nov. (Asteraceae: Cardueae): a new species from Central Anatolia, Turkey

Onopordum nezaketianum sp. nov. (Asteraceae: Cardueae) from the Central Anatolia region of Turkey is described based onmorphological and palynological features. The new species is morphologically related to O. davisii Rech. f. and O. turcicum Danin, andis characterized by its capitula solitary or 2–4 on leafy 2–20 cm long peduncles, phyllaries 5–6 seriate, outer phyllaries sparsely arachnoidpubescent, ovate–lanceolate, flat or nearly reflexed; median phyllaries sparsely arachnoid pubescent, narrowly ovate–lanceolate, reflexed;inner phyllaries glabrous, linear–lanceolate, erect, flowers 20–25 mm; 4 corolla lobes equal, 4–5 mm long, and 5th lobe 6–7 mm long,pappus barbellate. Achenes 4.0–5.1 × 2.0–2.5 mm, grayish, obovate, deeply transverse rugose, with finely and irregularly undulatesurface. Pollen grains of O. nezaketianum are trizonocolporate, oblate–spheroidal, and ornamentation microreticulate.

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