Tree is medium to large (10-40 m in height), evergreen with symmetrical, rounded canopy ranging from low and dense to upright and open. Bark is usually dark grey-brown to black, rather smooth, superficially cracked or inconspicuously fissured, peeling off in irregular, rather thick pieces. Exudate of the live bark transparent, a dark yellowish brown, drying brown, consisting of a resin mixed with a gum. The bark contains 78% resin and 15% gum in addition to tannic acid. Terminal bud small, enveloped by small, lanceolate acute bud scales. Twigs not very thick, smooth, apically angular, glabrous, glossy and dark green.

Root

The tree forms a long unbranched long tap root (up to 6-8 m and more) plus a dense mass of superficial feeder roots. Feeder roots develop at the base of the trunk or slightly deeper; these produce anchor roots, and sometimes a collection of feeder roots develops above the water table. The fibrous root system extends away from the drip line. Effective root system of an 18- year old mango tree may observe a 1.2 m depth with lateral spread as far as 7.5m (Bojappa and Singh, 1974).

Leaf

The leaves are simple, exstipulate, alternately arranged, 15-45 cm in length. The petiole varies in length from 1 to 12 cm, always swollen at the base. It is grooved on the upper side. The phyllotaxy is usually 3/8 but as the leaves are arranged very closely at the tips they appear to be whorled. Leaves are variable in shapes like oval-lanceolate, lanceolate, oblong, linear-oblong, ovate, obovate-lanceolate or roundish-oblong (Singh, 1960). The apex ranges from acuminate to nearly rounded. The margin is usually entire, sometimes slightly undulated and wavy, rarely twisted or folded. The length and breadth varies from 12 to 45 cm and 2 to 12 cm, respectively, depending on variety and growth. The secondary veins are quite prominent, and in some of the varieties range from eighteen to thirty pairs. The upper surface is shining and dark green while the lower is glabrous light green. The leaves appear in flushes. They are flaccid and pendulous when young. The colour of young leaves generally vary form variety to variety, generally being tan-red, pink, yellow-brown in colour. As the leaf grows, its colour changes from tan-red to green, passing through many different shades and become dark green at maturity.

The leaves have fibres and crackle when crushed. They strongly smell of turpentine (some cultivars do not smell). The leaves contain a good amount of mangiferin (xanthone). In India, it was obtained as "Indian Yellow" from the cow's urine. Cows were fed exclusively with mango leaves and ultimately excessive feeding on leaves lead to the death of the animal.

Inflorescence
The inflorescence is pseudo-terminal, originating from a bud, together with the new leafy sprout; there are cultivars with lateral inflorescence. The inflorescence is a narrowly to broadly conical panicle up to a 45 cm long depending upon cultivar and environmental conditions during its development. It is usually bracteate, but may sometimes be ebracteate. The bract if present, is leafy, elliptical and concave. The colour of the panicle may be yellowish-green, light green with crimson patches or with crimson flush on branches. It is generally pubescent but sometimes may be glabrous. The branching of the inflorescence is usually tertiary, rarely quaternary, but the ultimate branching is always cymose (Singh, 1960). The panicle bear 500-6000 flowers of which 1-70% are bisexual, remainder are male depending on the cultivar and temperature during its development.

Flowers
Hermaphrodite and male flowers are produced in the same panicle, usually with a larger number of the later. The size of both male and hermaphrodite flowers varies from 6 to 8 mm in diameter. They are subsessile, rarely pedicellate, and have a sweet smell. Pedicels are very short or missing; they are articulate with a panicle branch of the same diameter, which is often mistaken for the pedicel (Barfod, 1988). The calyx is usually fivepartite. The lobes are ovate-oblong and concave. The corolla consists of five pale yellow petals (rarely four to eight), which are twice as long as the calyx and contain three to five ridges on the ventral side. The petals are in bud imbricate and slightly contorted. They are thin, yellowish and after expanding horizontal, the upper half rather irregularly and not very pronouncedly reflexed, they are free at their base. The ridges are slightly dark. The upper half and the margin of the petal are white. On fading, the petals become pinkish. Between the corolla and androecium there is an annular, fleshy, and five-lobed disc (Singh, 1960; Kostermans and Bompard, 1993).
The androecium consists of stamens and staminodes, altogether five in number, of which usually one, or rarely two, are fertile and the rest are sterile. However, in cultivar Pico, three fertile stamens have been reported (Juliano and Cuevas, 1932). As many as ten stamens, which occur in other members of the genus, may also occasionally be found in the form of primordia only (Maheshwari, 1934). All the stamens are inserted on the inner margin of the disc. The position of the fertile stamen and pistil may be either parallel or oblique to each other (Naik and Gangolly, 1950). The fertile stamens are longer than the staminodes and are nearly equal to the length of the pistil. The colour of the anther is pink, which turns purple at the time of shedding.
The ovary is sessile, one-celled, oblique and slightly compressed in its lateral aspect. It is placed on the disc. The ovule is anatropous and pendulous, and shows one-sided growth. The style arises from the edge of the ovary and ends in a simple stigma. Sometimes three carpels may develop in a flower (Singh, 1960).

Pollen
The pollen grains are of variable shapes, with the size varying from 20 to 35 micron (Mukherjee, 1950; Singh, 1954). Small amount of pollen is produced in M. indica; the grains are sphaeroidal to prolate sphaeroidal, radially symmetrical, subangular in polar view, isopolar, with a few giant triploid ones of up to 50 micron, they are 3-monocolporate, goniotreme, sides convex-subprolate; apertures equidistant and zonal; ecto-aperture (colpus) extends slit-like from pole to pole.

Fruit
The fruit is a more or less compressed, fleshy drupe. It varies considerably in size, shape, colour, presence of fibre, flavour, taste and several other characters. The most characteristic feature of the mango fruit is the formation of a small conical projection developing laterally at the proximal end of the fruit, known as the beak. It may be quite prominent in some, less so in others, while in some varieties it is represented merely by a dot. A wide sinus is always present just above this beak. The pistillate area of the fruit located near the base of the beak is known as the nak. The shape of the fruit varies from rounded to ovate-oblong or longish, with the length varying from 2.5 to 30 cm in different varieties. The base may be depressed or elevated or may be intermediate. The skin is gland-dotted and at maturity its colour exhibit different mixtures of green, yellow, and red shades. It may be smooth or rough. The acrid juice, with turpentine like smell, present in the stalk or sometimes in the fruits, is known as chenp in Hindi is due to myrcene and ocimene. Its main irritating constituent has been identified as an allergenic urushiol, 5-heptadecenylreorcinol.