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NORDIC JOURNAL OF BOTANY, vol.29, no.4, pp.408-416, 2011 (SCI-Expanded)
The present study introduces two new nothospecies from Turkey, Convolvulus x pseudocompactus C. Aykurt & Sumbul (C. oleifolius Desr. var. deserti Pamp. x C. compactus Boiss.) and Convolvulus x peshmenii C. Aykurt & Sumbul (C. holosericeus Bieb. subsp. macrocalycinus Hausskn. & Bornm. x C. compactus Boiss.). Morphological differences and similarities between the hybrids and their parents are discussed; in addition, habit and sepals are illustrated as diagnostic characters, and the geographic distribution of the hybrids and their parents are mapped. Pollen characteristics of Convolvulus x pseudocompactus, Convolvulus x peshmenii and their parents were examined by means of light microscopy and SEM. Detailed morphological and palynological investigations have been performed for hybrid individuals and parental species. As a result of the palynological investigations, the rate of dehydrated pollen grains was established as an important criterion to determine the hybrid status of Convolvulus taxa.