Artists Handbook of Botany by Leech Lizabeth;

Author:Leech, Lizabeth;
Language: eng
Format: epub
Publisher: The Crowood Press

Hornbeam showing alternate leaves on either side of the stem (forming two vertical rows) with a flattened appearance. The arrangement is opposite distichous. Leaves 1 and 3 are in the same position after one turn round the stem and passing through two nodes – giving the simplest 1(turn)/2(node) phyllotaxy.

Apricot twig showing an alternate spiral arrangement. Leaves 1 and 6 are in the same vertical row, as are 2 and 7 – that is, the leaves are in exactly the same position on the stem – two turns round the stem and past five nodes (leaf attachments). The phyllotaxy is 2/5.

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