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Longitudinal section of the apical meristem with young leaflets in Elodea

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1  apical meristem
3  young leaflets
4  axillary buds
5  air cavities
2  primordium (onset) of leaf

English name: Pondweed
Scientific name: Elodea sp.
Familia: Hydrocharitaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae
The apical meristem of pondweed is elongated. Numerous young leaves are formed along the flanks of the tip of a branch. The mature leaves are only two cells thick. Side buds can be discerned between the leaves. The stem contains numerous air cavities that help the plant to float.

last modified: 5 Jun 2014