Rose oil the aromatics unaltered by heat. Because CO is gas at normal atmospheric pressure, it leaves no trace of itself in the final product. The equipment for CO extraction is expensive, which is reflected in the price of the essential oils obtained from the process. It takes a large amount of rose petals to distill a small amount of essential oil. Depending on extraction method and plant species, the typical yield can be approximately 1:3,000. To mitigate the cost, some dishonest dealers will dilute rose oil with geranium ("Pelargonium graveolens") or palmarosa ("Cymbopogon martinii") essential oils, both of which are rich
Nelumbo nucifera dish. In Kerala (in Malayalam "താമര") and Tamil Nadu, this end product is called " Thamara Vathal". In [China] and Korea, lotus leaf tea (연잎차 "yeonipcha") is made from the leaves of the lotus. In Korea, lotus flower tea (연꽃차 "yeonkkotcha") is made from the dried petals of the white lotus. The stamens can be dried and made into a fragrant herbal tea (), or used to impart a scent to tea leaves (particularly in Vietnam). This Vietnamese lotus tea is called "trà sen", "chè sen", or "chè ướp sen". The petals, leaves and rhizome can also all be eaten