All water plants and the lotus are proper correspondence.
The sacred flower attribution for the 18thpath of the qabalistic Tree of Life is the lotus. Nelumbo nucifera, known by a number of names including Indian Lotus, Sacred Lotus, Bean of India, or simply Lotus, is a plant in the monogeneric family Nelumbonaceae. The Linnaean binomial Nelumbo nucifera (Gaertn.) is the currently recognized name for this species, which has been classified under the former names, Nelumbium speciosum (Willd.) and Nymphaea nelumbo, among others. This plant is a pink aquatic perennial flower. Like the other lotuses, its roots sink into the murky soil of a pond or river bottom, theey are refered to as “Mud-born” (pankaja) which is a sanscrit poetic term for the Indian lotus. From the muddy bottom of the river, a stem finally rise above the water surface to present bright flowers to the sun. The cuplike seed pod is surrounded by a a many-layered wreath of lotus petals, which at dawn open to full bloom in time to greet the sun as it rises. Throughout the day the flower turns to face the sun as it moves across the southern sky and after sunset the lotus petals close into a tight bud around the seed pod in the center. Under favorable circumstances its seeds may remain viable for many years, with the oldest recorded lotus germination being from that of seeds 1,300 years old recovered from a dry lakebed in northeastern China.Researchers report that the lotus has the remarkable ability to regulate the temperature of its flowers to within a narrow range just as humans and other warmblooded animals do and that by doing so they create a warm and welcoming place for bees and other pollinators.As a poetic image and visual icon, “the lotus symbol evokes the realization that all life, rooted in mire, nourished by decomposed matter, growing upward through a fluid and changing medium, opens radiantly into space and light. The mire and fluidity symbolize the grosser, heavier qualities of nature, including the mind’s nature. The flower, beautifully multipetaled, symbolizes the array of subtler, more lucid qualities, with the golden hue, the radiance of spirit, at its center.” In Egyptian myth, a lotus emerges out of the dark waters of the primeval sea as emblem of the spirit of life, luminous and fragrant, disclosing sometimes as a divine child, the sun god Ree; in the form of the beautiful blue lotus of the Nile valley, it is sacred to the goddess, the womb from which golden life arises. The yearly flooding of the Nile was a repetition of this “first time” when the waters receded to reveal the first shallows out of which a lotus-flower could bloom to support the sun-god. From ancient times the lotus has been a divine symbol in Asian traditions representing the virtues of sexual purity and non-attachment. Hindus revere it with the divinities Vishnu and Lakshmi often portrayed on a pink lotus in iconography. In the representation of Vishnu as Padmanabha (Lotus navel), a lotus issues from his navel with Brahma on it. Goddess Sarasvati is portrayed on a white-colored lotus. Often used as an example of divine beauty, Vishnu is often described as the ‘Lotus-Eyed One’. Its unfolding petals suggest the expansion of the soul. The growth of its pure beauty from the mud of its origin holds a benign spiritual promise. In Hindu iconography, other deities, like Ganga and Ganesha are often depicted with lotus flowers as their seats. The lotus plant is cited extensively within Puranic and Vedic literature. Most deities of Asian religions are depicted as seated on a lotus flower. In Buddhist symbolism, the lotus represents purity of the body, speech, and mind as if floating above the muddy waters of attachment and desire. According to legendGautama Buddha was born with the ability to walk, and lotus flowers bloomed everywhere he stepped. In the classical written and oral literature of many Asian cultures the lotus is present in figurative form, representing elegance, beauty, perfection, purity and grace, being often used in poems and songs as an allegory for ideal feminine attributes. As is typical for Hindu and Buddhists sacred images, Akshobya, Buddha Imperturbable, sits on a lotus throne amd manifests spiritual luminosity. He touches the ground as his witness that samsaric world, all that arises and passes away, does not disturb him. And yet he is not separate from it. Just as a lotus lives in a murky mud-bottomed pond, so nirvana, of which he is an image, is not apart from samsara, nor samsara from nirvana. The Sanskrit mantra “Om mani padme hum (literally “Om the jewel in the lotus hum”) expresses this seating of Buddha-mind, the enlightening jewel, in the psychophysical world. The esoteric yogas of India and Tibet picture a sequence of chakras, vital energy centers in the subtle body, as lotuses of particular hues and petal numbers. At the top of the head is a thousand-petalled lotus. Their colors and petal numbers reflects the place in the spectrum from red to violet amd hite light, and their energies correspond with the nergies of the universe. The colors, shapes and energies manifests through meditation, chanting and visualizations stimulated by such images as Radha, Krishna, Buddha, their lotus eyes or hands, or a lotus flower. Meditative practice
 For a confirmation concerning those attributions, see Stephen Hoeller, The Fool’s Pilgrimage, p. 59; Israel Regardie, A Garden of Pomegrenates, p. 76.
In Sanskrit the word lotus (padma पद्म) has many synonyms. Since the lotus thrives in water, ja (denoting birth) is added to synonyms of water to derive some synonyms forthe lotus, like ambuja (ambu= water + ja=born of), neeraj (neera=water + ja= born of), pankaj, pankaja, kamal, kamala, kunala, aravind, arvind, nalin, nalini and saroja and names derived from the lotus, like padmavati (possessing lotuses) or padmini (full of lotuses). These names and derived versions are often used to name girls (and to a lesser extent boys) in India, Nepal and Sri Lanka, as well as in many other countries influenced by Indic culture.
Dr. Roger S. Seymour and Dr. Paul Schultze-Motel, physiologists at the University of Adelaide in Australia, found that lotus flowers blooming in the Adelaide Botanic Gardens maintained a temperature of 86 to 95 degrees Fahrenheit, even when the air temperature dropped to 50 degrees. They suspect the flowers may be turning up the heat for the benefit of their coldblooded insect pollinators. Only two other species have so far been found to be able to regulate their temperature, both in the arum-lily family: the skunk cabbage and a Philodendron known as elephant ear. See Seymour, R. S. and Schultze-Motel, P. (1996) Thermoregulating lotus flowers. Nature 383:305. See also Roger S. Seymour, (2001, Biophysics and Physiology of Temperature Regulation in Thermogenic Flowers,Bioscience Reports, Vol. 21, No. 2, April 2001.
 A. Rosenberg, K. Martin (2010), The Book of Symbols. Reflection on Archetypal Images. p. 158.
 See Stephen Quirke (1992), Ancient Egyptian Religion. NY. p. 26.