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
Władysław Szafer Institute of Botany Władysław Szafer Institute of Botany The Władysław Szafer Institute of Botany (Instytut Botaniki im. Władysława Szafera, Polish) in Kraków, Poland is a major European herbarium containing a collection of over 650,000 vascular plants, bryophytes, algae, fungi, lichens, and various plant fossils. The vascular plant specimens are primarily from Central Europe with a specialization in alpine plants. The bryophytes are Polish, Antarctic and subAntarctic, and East African. The fossil plants are largely Central European. Main publications include "Acta Palaeobotanica", and the "Polish Botanical Journal". The herbarium was established in the 1950s by professor of botany and paleobotany, Władysław Szafer, at the