Words similar to capitula

Example sentences for: capitula

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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 [ 68 ] , and may explain occasional heterogamous disciform capitula in S. bigelowii [ 34 35 ] . However, there may be many genetic and developmental mechanisms that affect ray formation and control floret fertility [ 69 70 ] .
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.
The genera that comprise the Artemisia -group are closely related and were considered monophyletic on the basis of ancestrally, disciform-heterogamous capitula and spineless pollen, with discoid capitula secondarily derived by the loss of ray or marginal florets (Fig.
In Artemisia s.l ., the typical limb of the Anthemideae-type ray florets are reduced to a membranous vestige, giving the impression that the small capitula are composed only of disk florets, referred to as disciform capitula (inflorescence) by Bremer and Humphries [ 2 ] . In other members of the genus, the ray flowers are absent, thus the capitulum is composed only of disk florets, i.e ., discoid.