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A Morphological Study of the Leaf Notches of Bryophyllum calycinum

M. Dorisse Howe
American Journal of Botany
Vol. 18, No. 5 (May, 1931), pp. 387-390
Stable URL: http://www.jstor.org/stable/2435850
Page Count: 5
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A Morphological Study of the Leaf Notches of Bryophyllum calycinum
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Abstract

1. The growth in the notches of the leaves of Bryophyllum calycinum is exogenous. 2. The growth proceeds from a meristematic group of cells which is present in the very young leaves. 3. The growth, which may be termed a "bud," is definitely organized when the leaf is mature. 4. The roots are formed after the formation of the stem primordium and are endogenous. 5. Growth of the leaf notches producing well developed plantlets is possible while the leaf is still attached to the plant, and while the parent plant is, as nearly as can be observed, in a healthy condition.

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