fascicles of Opuntia may have little or nothing to do with branch morphology.

In pines

Leaf fascicles are present in all pines, and the number of adult leaves (needles) per fascicle is an important character for identification of pine species and genera. Most species have fascicles of two to five needles; only occasional species typically have as few as one or as many as six leaves to the fascicle.

Variation

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