Pappus (botany) Pappus (botany) The pappus is the modified calyx, the part of an individual floret, that surrounds the base of the corolla tube in flower heads of the plant family Asteraceae. The term is sometimes used in other plant families such as Asclepiadaceae (milkweeds), whose seeds have a similar structure attached, although it is not related to the calyx of the flower. The Asteraceae pappus may be composed of bristles (sometimes feathery), awns, scales, or may be absent. In some species, the pappus is too small to see without magnification. In species such as Dandelion or "Eupatorium", feathery bristles of the
Annals of Botany two volumes before ceasing. Annals of Botany Annals of Botany is a monthly peer-reviewed scientific journal, founded in 1887, that publishes research articles, brief communications, and reviews in all areas of botany. The journal is supported and managed by Annals of Botany Company, a non-profit educational charity, and published through Oxford University Press. According to the 2011 "Journal Citation Reports" it has an impact factor of 4.041, in 2016 ranking 22nd out of 211 in the category Plant Sciences. There was an earlier periodical "Annals of Botany" edited by Carl Dietrich Eberhard König (Charles Konig) and John Sims which started