It was succeeded by the sessile-fruited oak, which was in turn supplanted by the pedunculate form of the same tree.
One extremity carries a pedunculate rosette-organ.
A flower having a stalk is called pedunculate or pedicel- late; one having no stalk is sessile.
Therein an order Thoracica comprehends the pedunculate Lepadidae, together with the operculate and sessile Balanidae and Verrucidae; a single species without cirrhi constitutes the order Apoda, and a single species with only three pairs of cirrhi the order Abdominalia.
The vernacular name barnacle, traceable to the fable of pedunculate cirripedes hatching out into bernicle geese, has also been transferred to the sessile cirripedes, which are popularly known as acorn barnacles.