Phyllotaxis
the spirals are counted, not admired
Generator

radius-adds-a-tenth

For each reported pair, the divergence angles consistent with the pair alone and with the pair plus the rise its counting radius implies. The gap between the two series is a factor of 1.10 to 1.10. The radius is still the measurement for where the transitions sit along an axis; it is not what recovers the angle.
The counting radius is worth about 10 per centFor each reported pair, the divergence angles consistent with the pair alone and with the pair plus the rise its counting radius implies. The gap between the two series is a factor of 1.10 to 1.10. The radius is still the measurement for where the transitions sit along an axis; it is not what recovers the angle.-1-0.50000.500the reported pairangles left open, log₁₀ °5/88/1313/2121/3434/55the pair aloneand with its radius5 pairs · rise from the rung each pair occupies×1.10 on average

Drawn at its defaults, in the survey this site has not done. It takes no options at all, so every essay calling it gets this exact drawing.

Called by 4 essays

the blast radius of changing it

The pattern itself

The counts change with radius

The same head gives 13 and 21 near the centre, 21 and 34 further out, 34 and 55 beyond that, and 55 and 89 at the rim. The transitions are at computable radii, and a photograph captioned with one pair is a statement about one annulus rather than about a flower.

 The claims, measured

What a count is worth

A reported parastichy pair pins the divergence angle to a band 221°/mn wide — so 2 and 3 says almost nothing and 34 and 55 fixes it to a tenth of a degree. Every rung of the ladder is worth a factor of φ², and the counting radius this collection has asked published counts for since its foundation adds ten per cent.

 The claims, measured

The survey this site cannot do

Four phases of asking for a dataset, and it is still not here. What this phase can do instead is specify it — the fields, the sampling, the sizes, and which of this collection's claims each one would settle. Two of the four fields asked for turn out to be worth less than the asking implied, and one was never asked for at all.

 The claims, measured

The test a plant could settle

Every other open question in this collection is priced in tens of specimens, and one of them in a hundred and sixty. This one is priced in internodes on a single stem, and the number is fifty-six — because it is a statistic of one sequence rather than a share of a population.

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