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3. On some Abnormal Cones of Pinus Pinaster
Published online by Cambridge University Press: 15 September 2014
Extract
In their celebrated essay, “Sur la disposition des feuilles curviseriées,” the brothers Bravais describe a cone of Pinus Pinaster (Pin maritime), where the lower part of the cone exhibited secondary spirals 7S, 12 D (series 
), while towards the apex the arrangement, in consequence of the disappearance of one of the spirals by 12, changed to 7S, 11D (series 
). They describe another cone of the same species, in which the lower four-fifths exhibited secondary spirals 9 S, 13 D (series 
), changing at the upper fifth to 8S, 13 D (ordinary series 
) by suppression of one of the spirals by 9. Such cases, along with some others chiefly in the capitula of Dipsacus sylvestris, lead these authors into a discussion of the general question of the possible transition from one discussion of the general question of the possible transition from one arrangement to another by change in the number of secondary spirals.
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- Proceedings 1870-71
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- Copyright © Royal Society of Edinburgh 1872
References
page 449 note * Ann. des Sc. Nat. 2d ser. t. vii.
page 449 note † L. c. p. 93.
page 449 note † L.c. p.103.
page 450 note * L. c. pp. 104, 105.
page 452 note * The greater number of these plants would be reckoned as truly rectiserial by MM. Bravais. Dr Dickson has no hesitation in referring to such cases in this argument, as he is strongly disposed to. doubt as to there being any fundamental distinction between the “rectiserial” and the so-called “curviserial” spirals of these authors.
page 452 note † In these tables, under S, are indicated the numbers of spirals, generating as well as secondary, running to the left; under D, the numbers of those running to the, right; while under V are indicated the numbers of vertical rows.