Australian Tropical Ferns and Lycophytes
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Australian Tropical Ferns and Lycophytes - Online edition
4.5.2 Pinna or pinnule form
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Pinnatifid: is the pinnule deeply lobed along either side in pinnate form (but not divided to the midrib so that the lobes are continuous with one another at their bases).
Simple: the pinnule is not deeply lobed.
Pinnate: the pinnule is divided into a single series of leaflets attached along both sides of a midrib or rachis like the elements of a bird's feather.
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