# Buchanania lanzan

Buchanania lanzan, commonly known as charoli nut, almondette, Cuddapah almond, calumpong, Hamilton mombin, is a deciduous tree in the family Rutaceae. The charoli tree is native to the Indian subcontinent, South Central China, and much of Southeast Asia.
The charoli tree produces fruit that is edible to humans. The seeds are used as a cooking spice, especially in India. Charoli seeds are also used in the Ayurveda, Unani, and Siddha systems of medicine.
Some sources misapply the name Buchanania cochinchinensis to this species.

## Description

The tree grows to about 20 m (66 ft). Young branches are covered with dense, matted, woolly hairs. The leaves are 10 cm–20 cm × 6 cm–9 cm (3.9 in–7.9 in × 2.4 in–3.5 in), broadly oblong with emarginate (slightly indented at the tip) apices and rounded bases. The flowers are white and 0.3–0.4 cm (0.12–0.16 in) in diameter. The fruit are drupes, 0.4–1 cm (0.16–0.39 in) in diameter and subglobose (not quite spherical) in shape. When ripe, they are stone hard and reddish-purple in color. Flowering occurs March–April, and the fruit is generally harvested in the months of April to June.

## Taxonomy

Genus Buchanania is named for Francis Buchanan (1762–1829), a Scottish botanist, explorer, naturalist, and surgeon in the British East India Company. B. lanzan is one of 26 currently accepted species in genus Buchanania. The species was first described in 1801 by Kurt Polycarp Joachim Sprengel. Some authorities treat B. lanzan as a synonym of B. cochinchinensis. However, B. cochinchinensis is a synonym of Glycosmis cochinchinensis.

## Distribution and habitat

The charoli tree is native to Bangladesh, Cambodia, China (south-central and Hainan), India, Laos, Myanmar, Nepal, Thailand, Vietnam, and the Western Himalayas. It grows in the wet tropical biome.

## Uses
### Food and cooking

Though sometimes referred to as the "chironji nut" or "charoli nut", the fruit is actually a type of drupe rather than a true botanical nut. After the hard shell is cracked, the stubby seed within is similar in texture to a pine nut. The charoli seed is around 0.6 cm (0.24 in) in length, with a flavor resembling an almond or a pistachio. The seeds are used as a cooking spice, especially in Indian cuisine. Though they can be eaten raw, they are often toasted or roasted before use, as this intensifies the flavor of any nut or seed. They are commonly used in Indian sweets, or ground into powders for thickening and flavoring savory sauces, batters and kormas.

### Traditional medicine

Charoli seeds are used in the Ayurveda, Unani, and Siddha systems of medicine. A decoction can be prepared from the bark of the stem or the leaves, to be used as a treatment for indigestion, mumps, impotence, spermatorrhea, heavy menstrual bleeding, diarrhea, and snakebite. This can also be used as an expectorant, aphrodisiac, or a laxative. The leaves can be crushed and applied to burns and wounds.

## Cultivation

The species is not commercially cultivated in India. The fruit is collected by local people from the forests and sold directly to the local markets. With a potential annual production of 5000 metric tonnes, Chhattisgarh is the highest-producing state in India for charoli fruit. Leafhoppers, mealybugs, and bark-eating caterpillars (Indarbela spp.) are important pests of B. cochinchinensis, while gummosis and powdery mildew represent important pathogens.

## Significance in Buddhism

Circa 588 BCE, the 35-year-old Siddhartha Gautama stayed for seven weeks (7x7 days = 49 days = 1 sattasattāha) at Uruvela (modern Bodh Gaya), which is located in the present-day Indian state of Bihar. According to the Great Chronicle of Buddhas, he spent one week at each of seven successive locations there. During these seven weeks, he did not eat or drink, wash or excrete, or lie down. The specific locations were:
* Week 1: the Week on the Aparājita Throne (Pallanka Sattāha). After meditating under the Bodhi Tree for seven days and nights, he attained enlightenment, becoming the spiritual teacher known as the Buddha and the founder of Buddhism.
* Week 2: the Week of the Gaze (Animisa Sattāha)
* Week 3: the Week on the Walk (Cankama Sattāha)
* Week 4: the Week at the Golden House (Ratanāghara Sattāha)
* Week 5: the Week at the Ajapāla Banyan Tree
* Week 6: the Week at Mucalinda Lake (Mucalinda Sattāha)
* Week 7: the Week at the Rājāyatana Tree (Rājāyatana Sattāha)
The seventh week was passed while sitting under a rājāyatana (B. cochinchinensis) tree, where the Buddha enjoyed the bliss of his newly attained buddhahood. Upon the completion of this sattasattāha, several important "firsts" in Buddhism took place at the rājāyatana tree at Bodh Gaya, including:
* the first words of dharma to be uttered by the Buddha
* the first lay disciples (two passing merchants from Pokkharavatī named Tapussa and Bhallika) to take refuge in the teachings of the Buddha
* the first food offering to the Buddha (rice cake and honey) after his enlightenment
* the first Buddhist monk's bowl
* the first relics of the Buddha to be distributed after his attainment of buddhahood
According to Burmese folklore, Tapussa and Bhallika (the two passing merchants who became the Buddha's first lay disciples) later returned to their home in Okkalapa (Lower Burma), where they built a cetiya on Singuttara Hill (the Shwedagon Pagoda), where they enshrined the hair relics given to them by the Buddha.

## Gallery

* Trunk
* Flowers and flower buds
* Flowers
* Detail of flowers
* Charoli fruit
* Charoli seeds
* Leaves