File:EB1911 Leaf - Cycle of thirteen leaves.jpg
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EB1911_Leaf_-_Cycle_of_thirteen_leaves.jpg (457 × 431 pixels, file size: 56 KB, MIME type: image/jpeg)
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English: Cycle of thirteen leaves placed closely together so as to form a rosette, as in Sempervivum. A is the very short axis to which the leaves are attached. The leaves are numbered in their order, from below upwards. The circles in the centre indicate the five turns of the spiral, and show the insertion of each of the leaves. The divergence is expressed by the fraction five-thirteenths. |
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| Date | published 1911 | |||
| Source | “Leaf,” Encyclopædia Britannica (11th ed.), v. 16, 1911, p. 328, fig. 34. | |||
| Author | Alfred Barton Rendle | |||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:05, 6 July 2020 | | 457 × 431 (56 KB) | Library Guy (talk | contribs) | {{Information |description ={{en|1=Cycle of thirteen leaves placed closely together so as to form a rosette, as in ''Sempervivum''. A is the very short axis to which the leaves are attached. The leaves are numbered in their order, from below upwards. The circles in the centre indicate the five turns of the spiral, and show the insertion of each of the leaves. The divergence is expressed by the fraction five-thirteenths.}} |date =published 1911 |source =“Leaf,” ''Encyclopædia... |
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