A revision of Rhaponticoides (Asteraceae, Cardueae–Centaureinae) from Iran

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Centaurea shahuensisandC. ravansarensisspp. nov. (Asteraceae, Cardueae) from west Iran

Nordic Journal of Botany, 2013

Two new species of Centaurea L. sect. Cynaroides Boiss. ex Walp. (Asteraceae), C. shahuensis Ranjbar and Negaresh and C. ravansarensis Ranjbar and Negaresh are described and illustrated from Kermanshah Province, west Iran. Th ey are closely related to C. regia Boiss. subsp. regia. However, C. shahuensis diff ers from it by median stem leaves broadly oblanceolate or subpandurate, phyllaries densely lanate-tomentose, appendages small, concealing a minor part of phyllaries, and also median appendage margin entire sometimes with 1-2 cilia, 1.2-3.0 mm long on each side. Centaurea ravansarensis is distinguished by upper stem leaves loosely arachnoid, phyllaries loosely fl occose-tomentose, inner appendages deep brown to blackish, and spine 4.5-6.0 mm long. Habitat, conservation status and the geographical distribution of the new species are given. Centaurea L. s.l. is one of the largest genera of the family Asteraceae. Among the more challenging taxonomic problems persisting in the Asteraceae is the delimitation of the genus Centaurea. Depending on the adopted classifi cation,

Centaurea alfonsoi(Asteraceae, Cardueae), a New Species from Iran

Annales Botanici Fennici, 2014

Centaurea alfonsoi Negaresh sp. nova (Asteraceae) is described and illustrated from Kermanshah Province, W Iran. It resembles C. regia subsp. regia, but differs from it by having densely tomentose phyllaries, with small appendages, triangular median appendages, shorter cilia and spine, and white flowers.

A contribution to Centaurea sect. Microlophus (Asteraceae, Cardueae) in Iran

Phytotaxa, 2018

Centaurea masjedsoleymanensis endemic to SW Iran and C. palanganensis endemic to W Iran are described as new species and illustrated. Centaurea masjedsoleymanensis is distinguished from its closely related species, C. pabotii, by having shorter median and upper cauline leaves, a spine of phyllaries up to 4 mm long, incised median cauline leaves, and smaller upper cauline leaves. Centaurea palanganensis is distinguished from C. thracica by having decurrent median cauline leaves, oblong or elliptic basal cauline leaves, phyllaries with a median appendage 10–13 mm long and a spine up to 2 mm long. The IUCN conservation status of both new species is evaluated as Vulnerable (VU). Results from cytogenetic analyses indicated that new taxa are diploid (2n = 2x = 16), which is consistent with the proposed base number of x = 8 for the genus. Meiosis was observed as regular, with bivalent pairing and normal chromosome segregation. Based on the results x = 8 and 9 was determined for C. sect. Mi...

A contribution to Centaurea sect. Acrocentron (Asteraceae) from Iran

Phytotaxa, 2013

Centaurea sanandajensis is described and illustrated as a new species from Kurdestan Province, W Iran. The characters that distinguish the new species from its nearest relative C. longipedunculata are given. In addition, C. elegantissima is reported as new to Iran, and its chromosome number (2n = 2x = 22) is counted for the first time. The description of C. elegantissima is completed with the characters of mature achenes, and its differences from the nearest relative C. kandavanensis are summarized. The geographical distribution of discussed species is presented.

A revision of Centaurea sect. Centaurea (Asteraceae) from Iran

TURKISH JOURNAL OF BOTANY, 2014

Introduction Subtribe Centaureinae (Asteraceae-Cardueae), centered mainly in the Mediterranean region (Wagenitz, 1986; Meusel and Jäger, 1992), contains about 31 genera with around 800 species (Hellwig, 2004). A wide array of growth and life forms are known among Centaureinae, ranging from tall shrubs to small annuals, the majority being polycarpic perennial herbs or monocarpic biennials (Hellwig, 2004). Following the progression in taxonomy, numerous taxonomic changes and rearrangements have been proposed in the genera of the subtribe Centaureinae (Garcia

Rhaponticoidesaytachii sp. nov. (Asteraceae) from south Anatolia, Turkey

Nordic Journal of Botany, 2009

A new species of Rhaponticoides Vaill., Rhaponticoides aytachii Y. Bagcı, Dogu & Dinç sp. nov. collected by the authors from south Anatolia, is described and illustrated. The new species is restricted to deprived Quercus forest openness around Dumlugöze-Sarıveliler (C4 Karaman). Diagnostic morphological characters from R. amplifolia (Boiss. & Heldr.) M. V. Agab. & Greuter are discussed. The ecology, biogeography and conservation status of the new species is also presented.

Karyomorphological study of five Turkish endemicRhaponticoidesVaill. (Asteraceae, Cardueae) species

Caryologia, 2016

In this paper, we aimed to determine the chromosomal features of Turkish endemic Rhaponticoides species. The chromosome numbers and karyomorphology of five species were examined. The chromosomal counts confirmed the previous reports of 2n = 30 given for Rhaponticoides species growing in different countries. Although R. iconiensis had a karyotype formula of 28m + 2sm, the remaining four species all had 26m + 4sm. Rhaponticoides aytachii and R. hierroi were especially similar in asymmetry indices. Rhaponticoides iconiensis and R. phytiae had satellites in the fourth and second chromosome pairs, respectively. Having the most symmetrical chromosomes, R. amasiensis displayed an important relationship with R. iconiensis and R. phytiae in terms of total chromosome length (TCL). If we make an overall assessment in terms of chromosomal asymmetry, chromosomes indices continues in the low range for each species and this low asymmetry indeces indicate that the species have symmetric chromosomes as karyomorphology. In conclusion, this is the first report which describes the karyotypes and chromosomal asymmetry indices of Turkish endemic Rhaponticoides species.