The pineapple (Ananas comosus) is a
tropical plant and
fruit (multiple), probably native to
Uruguay,
Brazil or
Paraguay. It is a tall (1–1.5
m)
herbaceous perennial plant with 30 or more trough-shaped and pointed leaves 30–100 cm long, surrounding a thick
stem. The pineapple is an example of a
multiple fruit: multiple, spirally-arranged flowers along the axis each produce a fleshy fruit that becomes pressed against the fruits of adjacent flowers, forming what appears to be a single fleshy fruit. The
leaves of the Smooth Cayenne
cultivar mostly lack spines except at the
leaf tip, but the Spanish and Queen
cultivars have large spines along the leaf margins. Pineapples are the only
bromeliad fruit in widespread cultivation. It is one of the most commercially important plants which carry out
Crassulacean acid metabolism, or CAM photosynthesis.
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