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Journal Article

Knee Roots in Avicennia marina (Forsk.) Vierh.

ALISON McCUSKER
Annals of Botany
New Series, Vol. 35, No. 141 (June 1971), pp. 707-712
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/42908855
Page Count: 7
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Knee Roots in Avicennia marina (Forsk.) Vierh.
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Abstract

The occurrence of knee roots in Avicennia marina (Forsk.) Vierh. is reported and specimens at various stages of development are described. Knee roots arise from horizontal roots in a manner similar to pneumatophores but anatomically they resemble horizontal roots. After re-entering the soil the knee root reverts to a horizontal position and gives rise to further pneumatophores and anchoring roots.

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