Concept
Vogel's model — where it appears
2 essays name this object, across 2 fields. What follows is each of them, and the objects they name alongside it.
A head is a set of points
The nth primordium at n times an angle, and a radius of root n. Two lines of arithmetic produce a sunflower head, which is either remarkable or suspicious depending on how carefully the claim is stated — and stating it carefully is most of the work.
A disc is a cylinder
Vogel's seed head makes the rise fall as one over radius squared, so a disc is not one lattice but a family of them. Feed that into the cylinder's ladder and it predicts where a sunflower's spiral counts change — with nothing fitted, and against a counter that never sees either model.
Named alongside it
The objects these essays reach for when they reach for this one.
CylinderDivergence angleParastichyConeCross validationL-systemsLadderMeristemParastichy pairPredictionPrimordiumRate