1. convolute vernation
Used to describe a newly unfurling leaf blade which has one half wholly rolled up in the other presenting itself as a tube. Convolute vernation occurs when several leaves spiral with the next leaf in a module enclosed within the current leaf. Synonymous with supervolute vernation but there is a slight difference since convolute involves a succession of leaves being formed as can be seen in the drawing to the right. See also Supervolute vernation and Involute vernation
http://www.exoticrainforest.com/Botanical%20terminology.html
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2) conduplicate vernation
https://etc.usf.edu/clipart/4600/4660/leaf_15.htm
Newly emerging leaves show two distinct patterns of unfurling. The first have the leaf margins inrolled to the upper leaf surface and are termed involute. The second have the leaf margins rolled toward the leaf underside and are termed revolute. Recently, a third type of leaf vernation has been shown to occur in Primula. In this conduplicate form the leaf edges meet in the middle like a clam-shell. The characteristic is useful in identifying a species when the suspected species is either "involute" or "conduplicate" type as this only occurs in a few species.
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| Revolute leaf | Revolute leaf in cross-section, P. involucrata |
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| Conduplicate leaf, P. simensis | |
3) Circinate vernation
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4) involute vernation
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