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  • Author or Editor: Harry B. Lagerstedt x
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Many different kinds of plants have the capacity to regenerate roots from the main veins of petioles or leaves, but relatively few can also differentiate a new growing point. Rhizomatous begonias are usually propagated from leaf cuttings because they give rise to both adventitious roots and shoots readilv. New plants arise from the leaf petiole or from cuts across main leaf veins which are kept in contact with a moist medium. A single begonia leaf usuallv yields at least one new plant from the petiole and three or four from the leaf veins.

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In the plant world, where oddity is commonplace, the filbert, Corylus, stands out because it has so many unusual traits:

  • The filbert blooms in midwinter in the areas where it is commercially produced.

  • Six months can elapse between pollination and fertilization.

  • At the time of pollination, the rudimentary flower has no ovary.

  • When the filbert nut has completed its development, its apex is over a year older than its base.

  • Commercial filbert production is restricted to limited areas of Turkey, Italy, Spain, and the Pacific Northwest, yet members of the genus Corylus are widely distributed throughout the northern hemisphere.

  • The plant is thought never to go dormant because in mild climatic areas it exhibits some type of growth the year around.

Open Access