A knob; a bud; a bunch; a button. "Four bowls made like unto almonds, with their knops and their flowers."
2.
(Arch.) Any boldly projecting sculptured ornament; esp., the ornamental termination of a pinnacle, and then synonymous with finial; called also knob, and knosp.
Knop sedge (Bot.), the bur reed (Sparganium); so called from its globular clusters of seed vessels.
... round Case, between which two, the interstices were fill'd with multitudes of stringie fibres, which seem'd to suspend the lesser Case in the middle of the other, which (as farr as I was able to discern) seem'd full of exceeding small white seeds, much like the seed-bagg in the knop of a Carnation, after the flowers have been two or three days, or a week, fallen off; but this I could not so perfectly discern, and therefore cannot positively ... — Micrographia • Robert Hooke