Phyllotaxis
the spirals are counted, not admired
Concept

Tracking — where it appears

2 essays name this object, across 2 fields. What follows is each of them, and the objects they name alongside it.
-0.500-0.25000.2500.50011.251.501.752nodes the stem spends per rung, log₁₀transition late by, in rungsone rung late8 rates · rise 0.4 → 0.0012worst mean lag 0.087 rungs

The lag that is not there

A pattern built out of its own history should hold its old parastichy pair past the point where a fresh lattice would have changed, and the gap should grow as the shoot is hurried. Over a fifteenfold range of rate it does not — every transition lands within a tenth of a rung of where the static ladder puts it.

emergence · tracking -0.25000.2500.500123456lag, in nodescorrelation between a divergence and the one that many nodes latersampling band4 runs each · 243 divergences per runmatched at 0.75° of scatter

The sequence has a memory

Every measurement this collection has made of a stem's divergence angles throws the order away. A spread is invariant to shuffling. Put the angles back in order and there is a large correlation between one and the next — 0.54 with no noise at all — which is the rule correcting itself, and which nothing had looked at.

cylinder · sequence

Named alongside it

The objects these essays reach for when they reach for this one.

EquilibriumRiseAutocorrelationBranchCylinderDiscretisationDivergence angleEnsembleLadderLagLattice offsetMeasurement

All concepts