Nelumbo nucifera

Nelumbo nucifera
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Name	Nelumbo nucifera
Regnum	Plantae
Ordo	Proteales
Familia	Nelumbonaceae
Genus	Nelumbo
Species	N. nucifera
Binomial	Nelumbo nucifera
Binomial authority	Gaertn.

Nelumbo nucifera. It is an aquatic perennial plant, often called the sacred lotus, renowned for its striking flowers and broad, water-repellent leaves. The plant holds profound cultural and religious symbolism across Asia, particularly in Hinduism and Buddhism. Beyond its symbolic value, it is cultivated for its edible rhizomes and seeds and is the subject of extensive scientific research due to its unique biological properties.

Description

The plant features large, peltate leaves that rise above the water surface on long petioles, a characteristic shared with other aquatic genera like Nymphaea. Its flowers, which can be pink or white, are solitary and hermaphroditic, containing numerous petals and stamens arranged around a distinctive conical receptacle. This receptacle later develops into the iconic seed pod. The seeds are notably long-lived, with documented viability from ancient sites like the Tianjin region, and the leaves exhibit the lotus effect, a superhydrophobic property studied for applications in materials science. The rhizomes are elongated and starchy, growing in the mud of pond substrates.

Taxonomy and naming

The species was formally described by Joseph Gaertner in the 18th century. It is the type species for the genus Nelumbo within the family Nelumbonaceae. Historically, its classification was debated; early systems like those of Carl Linnaeus placed it in the genus Nymphaea. Modern phylogenetic studies, including those using DNA sequencing, confirm its distinct lineage, placing Nelumbonaceae in the order Proteales, far from Nymphaeaceae. Common names include Indian lotus and sacred lotus, distinguishing it from the American species Nelumbo lutea.

Distribution and habitat

Its native range extends from Iran and the Caspian Sea eastward through India, China, Japan, and into Australia. It thrives in the warm, shallow waters of floodplains, lakes, and ponds, such as those in the Ganges delta and Lake Biwa. The plant has been naturalized in other regions, including parts of Europe and the United States, sometimes becoming invasive in ecosystems like the Chesapeake Bay.

Cultivation and uses

Extensively cultivated for millennia, it is a staple in Asian cuisines; the rhizomes are used in dishes like Japanese *kinpira*, while the seeds are eaten raw, popped, or used in pastes like lotus seed paste in Chinese cuisine. The young leaves and flower stalks are also edible. In traditional medicine systems such as Ayurveda and Traditional Chinese medicine, various parts are used. It is also grown ornamentally in water gardens worldwide, with cultivars developed at institutions like the Kew Gardens.

Cultural and religious significance

The lotus is a paramount symbol in dharmic traditions. In Hinduism, deities like Brahma, Vishnu, and Lakshmi are depicted seated on lotus flowers, and it is central to rituals described in texts like the Bhagavad Gita. In Buddhism, it symbolizes purity and enlightenment, associated with figures like Amitabha and Padmasambhava. It appears in the national emblems of India and Vietnam, and in the Flag of Bangladesh. The motif is prevalent in the art and architecture of Angkor Wat and Mogao Caves.

Research and chemical properties

Scientific interest focuses on its unique physiology and biochemistry. The lotus effect has inspired self-cleaning surface technologies. Studies at institutions like the University of Bonn have detailed its thermoregulatory flowering. The plant contains numerous bioactive compounds; berberine and quercetin are among the alkaloids and flavonoids investigated for potential effects on metabolic syndromes. Research into its antioxidant and anti-inflammatory properties is ongoing in fields like pharmacology.

Category:Flora of Asia Category:Medicinal plants Category:National symbols of India