The spiral pattern of an Aloe polyphylla plant at the University of California Botanical Garden. Stan Shebs via Wikicommons under CC BY-SA 3.0 To the untrained eye, plants may appear to grow rather ...
American Journal of Botany, Vol. 38, No. 4 (Apr., 1951), pp. 301-307 (7 pages) Leaf primordia in the Rosaceae are initiated locally on the flanks of the apex from two to five cells below the surface, ...
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