Australian Tropical Rainforest Plants - Online edition

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S55 with smooth margin The margin is neither toothed nor lobed but when the leaf blade is held horizontally at eye level waves may be apparent along the edge.
S56 with toothed margin Teeth are small lobes on the edge of the leaf blade and may be either sharp or rounded.
S57 with lobed margin Lobes are large projections or indentations on the blade margin.

Tenth leaf or leaflet margin shape

These features refer to the tenth leaf stage. The tenth leaf is the tenth true leaf produced after the cotyledons. On seedlings with alternate or spirally arranged leaves it is just simply the tenth leaf produced.  On seedlings with opposite leaves it is one of the leaves in the fifth pair of true leaves produced.  On seedlings with whorled leaves it will be one of the leaves in the appropriate whorl; e.g. if there are four leaves in each whorl then the tenth leaf will be one of the leaves in the third whorl.

This refers to the margin of the leaf blade (or leaflet blade in the case of compound leaves).

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