🍪Classification

Types of fruits

Fruit Morphology

• A fruit consists of pericarp and seeds. Seeds are fertilized and ripened ovules. Understanding fruit morphology is essential for classifying fruits correctly, which is a frequently tested topic in competitive exams.
• The pericarp develops from the ovary wall and may be dry or fleshy. The pericarp is the wall of the fruit that surrounds the seed, and its nature (dry or fleshy) is one of the primary criteria for fruit classification.
• When fleshy, the pericarp is differentiated into outer epicarp, middle mesocarp and inner endocarp. The epicarp forms the outermost skin, the mesocarp is typically the edible fleshy portion, and the endocarp is the innermost layer which may be stony (as in drupe fruits) or soft.

- So, most of the flowers are developed in the following way:

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👉🏻 On the basis of the above-mentioned features, fruits are usually classified into 3 main groups:

These three main groups are Simple fruits, Aggregate fruits, and Multiple (Composite) fruits. The classification depends on whether the fruit develops from a single ovary, multiple ovaries of one flower, or an entire inflorescence.

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Simple fruits

• When a single fruit develops from a single ovary of a single flower, it is called a simple fruit. This is the most common type of fruit in nature and includes the majority of commercially important fruits.
• Examples: Banana, ⭐️ Grapes, Papaya, Avacado etc.
• Simple fruits are of two types:
  • Dry Fruits
  • Succulent fruits (fleshy fruits)

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Dry fruits

• These fruits are not fleshy, and their pericarp (fruit wall) is not distinguished into three layers. In dry fruits, the pericarp becomes hard and papery at maturity, unlike fleshy fruits where it remains soft.
• Dry fruits classification:
  • Dehiscent fruits (capsular fruits)
    • Characteristic of these fruits is that their pericarp rupture after ripening and the seeds are disseminated. The term dehiscent means “to open” — these fruits split open naturally to release their seeds. Examples include okra and cotton.
  • Indehiscent fruits (Achenial fruits)
    • As their name indicates, pericarp of such fruits does not rupture on ripening and the seeds remain inside. The seed is typically released only when the fruit wall decays or is broken mechanically. Examples include sunflower (achene) and rice (caryopsis).
  • Schizocarpic fruits (Splitting fruits)
    • These fruits fall in between the above-mentioned two categories. Here, the fruit on ripening divides into one-seeded segments or mericarp; but the mericarps remain un-ruptured. They represent an intermediate type between dehiscent and indehiscent fruits. Examples include coriander and fennel.

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Succulent fruits (fleshy fruits)

• In these fruits pericarp is distinguished into pericarp, mesocarp and endocarp. The fleshy nature of these fruits makes them commercially important as they form the bulk of edible fruit crops.
• Mesocarp is fleshy or fibrous. In most edible fruits, the mesocarp is the part that we consume.
• These fruits are indehiscent, and seeds are liberated after the decay of the flesh. This means the fruit does not split open on its own; instead, the seeds are released when the fleshy part decomposes or is eaten by animals.
• Succulent fruits can be classified into Drupe, Pome and Berrie. Each type has a distinct internal structure that is important to understand.

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Drupe

• The pericarp or fruit wall is differentiated into thin epicarp (skin), fleshy mesocarp and stony endocarp. The stony endocarp (also called the “pit” or “stone”) is the defining feature of a drupe, which is why drupes are commonly called stone fruits.
• Hence it is also called as stone fruit, e.g. Mango, Jamun, Coffee, Coconut, Almond, Plum, Peach etc.
• In mango, mesocarp is juicy and edible. The thick, sweet, fleshy part of the mango that we eat is the mesocarp.
• In coconut mesocarp is fibrous and edible part is the endosperm. The nuclear endosperm which is suspended within the water of the coconut, develops and forms the edible coconut flesh. This is an important distinction — while mango and coconut are both drupes, their edible parts are entirely different.
• In almond, epicarp and mesocarp get peeled off and only hard endocarp can be seen in marketed fruits. The edible part is cotyledons. In almond, what we eat is actually the seed (cotyledons) found inside the stony endocarp.

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Pome

• It is a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within. A false fruit (also called pseudocarp) is one where the edible portion is not derived from the ovary but from an accessory part of the flower, in this case the thalamus (receptacle).
• E.g. Apple, Pear, Loquat etc. In apple, the fleshy part we eat is the thalamus, while the true fruit is the core containing seeds.

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Berry

• Berry is a fleshy fruit in which there is no hard part except the seeds. This makes berries distinct from drupes, which have a stony endocarp.
• Pericarp may be differentiated into epicarp, mesocarp and endocarp. All three layers of the pericarp are typically soft and fleshy.
• One or other of these layers may form pulp in which seeds are embedded which generally gets detached from the placenta.
• Examples: Banana, Papaya, Grape, Date Palm, Arecanut and Guava. Note that botanically, banana and grape are true berries, even though common usage of the word “berry” would not include them.
• The following are some fruits which show variations from the normal Berry: These are specialized types of berries with unique structural modifications:
  • Pepo: Watermelon (Cucurbits) — The outer rind is hard and derived from the receptacle, while the fleshy interior develops from the placenta.
  • Hesperidium: Citrus fruits like oranges and lemons — The rind contains oil glands, and the edible juice vesicles are actually endocarp outgrowths.
  • Amphisarca: Bael — A berry with a woody or hard rind (epicarp), distinguishing it from a typical berry.
  • Balusta: Pomegranate — The edible part is the fleshy seed coat (aril), and the fruit has a tough, leathery rind.

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Aggregate fruits

• They develop from the apocarpous ovaries of a single flower. Thus, from one flower, many fruits develop. An apocarpous ovary is one where the carpels are free (not fused together), so each carpel develops into a separate fruitlet. These individual fruitlets collectively form the aggregate fruit.
• Example: Eteario of berries, Custard Apple, Raspberry

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Multiple or Composite Fruits

• A fruit developing from a complete inflorescence is called a multiple or a composite fruit. i.e. many flowers — single fruit. In this type, an entire cluster of flowers fuses together during development to produce what appears to be a single fruit but is actually derived from many individual flowers.
• Examples: Pineapple (Sorosis) ^AFO-2021, Fig (Synconus), Jackfruit, Mulberry etc.
  • In Sorosis (e.g., Pineapple, Jackfruit, Mulberry), the fruits develop from a spike or spadix type of inflorescence.
  • In Synconus (e.g., Fig), the fruits develop inside a hollow, fleshy receptacle called a hypanthodium.

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Others

• Nuts: Litchi & Cashew — In Litchi, the edible part is the fleshy aril surrounding the seed. In Cashew, the edible “cashew apple” is actually the swollen pedicel (fruit stalk), while the true fruit is the kidney-shaped nut at the bottom.
• Capsule: Okra and Aonla — A capsule is a dry dehiscent fruit that splits open along multiple seams to release seeds.

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Ediable Part of Fruits

Knowing the edible part of each fruit is a very commonly asked question in exams. Remember that different fruits have different edible parts — for example, the edible part of mango is the mesocarp, apple is the thalamus, litchi is the aril, and coconut is the endosperm.

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Commonly Known as

Many fruits are commonly referred to by descriptive names. For example, Mango is the King of Fruits, Apple is the King of Temperate Fruits, Walnut is the King of Nut Crops, and Guava is the Apple of the Poor. These names are frequently asked in competitive examinations.

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Important families of fruit crops

Understanding the botanical family to which a fruit crop belongs is important because crops in the same family share similar characteristics in terms of flower structure, fruit type, and often pest and disease susceptibility. For example, Rosaceae includes apple, pear, peach, plum, and strawberry, while Rutaceae includes all citrus fruits.

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Fruiting Pattern

• Lateral bearing cultivars develop fruits on side small branches after three or four years of planting and bear heavily. Lateral bearing is generally more productive because a larger number of fruiting points are available on the side branches.
  • Ex. Mango
• In comparison to lateral bearing, tip bearing plants develop fruit on tips of one year old shoots after six or more years and produces yield smaller than lateral bearing cultivars. Tip-bearing trees require more careful pruning to ensure that fruiting tips are not removed accidentally.
  • Ex. Plum, Pear, Ber, Guava etc.

Understanding the fruiting pattern of a crop is crucial for deciding pruning strategies, training systems, and harvest management. Lateral bearers and tip bearers require fundamentally different approaches to pruning.

Summary Cheat Sheet

Concept / Topic	Key Details
Pomology	Study of fruit crops
Fruit classification by climate	Tropical, Subtropical, Temperate
Tropical fruits	Mango, banana, papaya, pineapple, jackfruit
Subtropical fruits	Citrus, guava, litchi, pomegranate, fig
Temperate fruits	Apple, pear, peach, plum, cherry, walnut
Drupe	Fleshy fruit with stone; mango, peach, plum, cherry
Pome	Fleshy receptacle; apple, pear
Berry	Many-seeded fleshy fruit; banana, grapes, tomato
Hesperidium	Modified berry; citrus fruits
Pepo	Hard-rinded berry; watermelon, muskmelon
Nut	Hard-shelled indehiscent fruit; coconut, walnut, cashew
Sorosis	Multiple fruit; pineapple, jackfruit, mulberry
Syconus	Hollow receptacle; fig
Climacteric fruits	Show ethylene burst at ripening; mango, banana, apple, papaya
Non-climacteric	No ethylene burst; citrus, grapes, litchi, pomegranate
Parthenocarpic	Seedless fruit without fertilization; banana, pineapple