shielding (s) angle


shielding (s) angle
  Angle by which a leaflet is transversely inserted on the rachis, often, but not always, resulting in leaflet overlap (sensu Grobbelaar, 2002), e.g. if leaflets overlap incubously the s-angle is nominally positive, if leaflets overlap succubously the s-angle is nominally negative.

Expanded glossary of Cycad terms . 2014.

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