Words similar to capitula
Example sentences for: capitula
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Seriphidium as a distinct genus along with several small genera from within the boundaries of Artemisia s.l . The more recent, major classifications [ 2 39 49 50 ] have agreed with the segregation of Seriphidium on the basis of discoid-homogamous capitula and recognized the smaller segregate genera as well.
The occasional appearance of disciform capitula in S. bigelowii might be explained by introgression of genes or alleles from A. filfolia that control ray expression, a phenomenon observed in discoid Senecio squallidus and radiate S. vulgaris in Europe [ 67 ] . While this is speculative, it is consistent with hypotheses that hybridization and introgression are widespread in sect.
Furthermore, the tentative placement of disciform Kaschgaria and discoid Stilnolepis sister to the entire subtribe suggests that there may have been multiple origins for disciform, as well as discoid capitula.
It is apparently defined taxonomically on the basis of plesiomorphies (heterogamous, disciform capitula with perfect/fertile disk florets and pistillate ray florets), and needs to be re-circumscribed.
Tridentatae is characterized by discoid-homogamous capitula, with the exception of S. bigelowii , which has occasional heterogamous-disciform capitula of one pistillate ray floret and two perfect disk florets - a character that was previously considered a plesiomorphy or secondary reversal in S. bigelowii [ 2 ] . Based on ITS and chloroplast phylogenies of sect.