Fruits
Vegetables
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Articles :
Fruit
Section: Types of Fruits
Related: Botany
Fruits are classified according to the arrangement
from which they derive. There are four typessimple, aggregate,
multiple, and accessory fruits. Simple fruits develop from a single
ovary of a single flower and may be fleshy or dry. Principal fleshy
fruit types are the berry, in which the entire pericarp is soft
and pulpy (e.g., the grape, tomato, banana, pepo, hesperidium, and
blueberry) and the drupe, in which the outer layers may be pulpy,
fibrous, or leathery and the endocarp hardens into a pit or stone
enclosing one or more seeds (e.g., the peach, cherry, olive, coconut,
and walnut). The name fruit is often applied loosely to all edible
plant products and specifically to the fleshy fruits, some of which
(e.g., eggplant, tomatoes, and squash) are commonly called vegetables.
Dry fruits are divided into those whose hard or papery shells split
open to release the mature seed (dehiscent fruits) and those that
do not split (indehiscent fruits). Among the dehiscent fruits are
the legume (e.g., the pod of the pea and bean), which splits at
both edges, and the follicle, which splits on only one side (e.g.,
milkweed and larkspur); others include the dry fruits of the poppy,
snapdragon, lily, and mustard. Indehiscent fruits include the single-seeded
achene of the buttercup and the composite flowers; the caryopsis
( grain ); the nut (e.g., acorn and hazelnut); and the fruits of
the carrot and parsnip (not to be confused with their edible fleshy
roots).
An aggregate fruit (e.g., blackberry and raspberry) consists of
a mass of small drupes (drupelets), each of which developed from
a separate ovary of a single flower. A multiple fruit (e.g., pineapple
and mulberry) develops from the ovaries of many flowers growing
in a cluster. Accessory fruits contain tissue derived from plant
parts other than the ovary; the strawberry is actually a number
of tiny achenes (miscalled seeds) outside a central pulpy pith that
is the enlarged receptacle or base of the flower. The core of the
pineapple is also receptacle (stem) tissue. The best-known accessory
fruit is the pome (e.g., apple and pear), in which the fleshy edible
portion is swollen stem tissue and the true fruit is the central
core. The skin of the banana is also stem tissue, as is the rind
of the pepo (berrylike fruit) of the squash, cucumber, and melon.
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