Abstract
Onopordum nezaketianum sp. nov. (Asteraceae: Cardueae) from the Central Anatolia region of Turkey is described based on morphological and palynological features. The new species is morphologically related to O. davisii Rech. f. and O. turcicum Danin, and is characterized by its capitula solitary or 2?4 on leafy 2?20 cm long peduncles, phyllaries 5?6 seriate, outer phyllaries sparsely arachnoid pubescent, 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 x 2.0?2.5 mm, grayish, obovate, deeply transverse rugose, with finely and irregularly undulate surface. Pollen grains of O. nezaketianum are trizonocolporate, oblate?spheroidal, and ornamentation microreticulate.
Highlights
Asteraceae (Compositae) is the largest family of flowering plants in Turkey (Güner et al, 2012)
After the most recent revision of Onopordum in Turkey, one new taxon and 3 new records have been added to the Flora of Turkey
The new taxon was added to the first supplement (Vol 10) [O. bracteatum Boiss. & Heldr. var. arachnoideum Erik & Sümbül (Davis et al, 1988)], and 2 of the 3 new records were added to the second supplement of the Flora of Turkey (Vol 11) [O. heteracanthum C.A.Mey. and O. sirsangense Rech.f. (Tuzlacı, 2000)]
Summary
Asteraceae (Compositae) is the largest family of flowering plants in Turkey (Güner et al, 2012). In 1970, an eminent Austrian botanist and plant collector Dr Friederice Sorger collected some Onopordum specimens from Göreme in Nevşehir Province in the Central Anatolia region. These samples were identified as O. turcicum Danin by Sorger. Danin (1975) has discussed certain interesting specimens from Central Anatolia, Göreme, Nevşehir Province, at the end of the description of O. turcicum Danin in the Flora of Turkey. He had concluded that these specimens were probably conspecific with O. turcicum, but had smaller capitula with laxer, slightly patent phyllaries. We present palynological and seed characters of the species to supplement the morphological findings
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