Ingredients

The quince is the sole member of the genus Cydonia in the Malinae subtribe of the Rosaceae family. It is a deciduous tree that bears hard, aromatic bright golden-yellow pome fruit, similar in appearance to a pear. Ripe quince fruits are hard, tart, and astringent. They are eaten raw or processed into jam, quince cheese, or alcoholic drinks.

Rambutan is a medium-sized tropical tree in the family Sapindaceae. The name also refers to the edible fruit produced by this tree. The rambutan is native to Southeast Asia. It is closely related to several other edible tropical fruits, including the lychee, longan, pulasan, and quenepa.

Ranunculus acris is a species of flowering plant in the family Ranunculaceae, and is one of the more common buttercups across Europe and temperate Eurasia. Common names include meadow buttercup, tall buttercup, common buttercup and giant buttercup.

Ranunculus bulbosus, commonly known as bulbous buttercup or St. Anthony's turnip, is a perennial flowering plant in the buttercup family Ranunculaceae. It has bright yellow flowers, and deeply divided, three-lobed long-petioled basal leaves.

Ranunculus glacialis, the glacier buttercup or glacier crowfoot, is a plant of the family Ranunculaceae. It is a 5-10(-20) cm high perennial herb. Often with a single relatively large flower, with 5 petals first white later pink or reddish. The underside of the 5 sepals are densely brown-hairy. The leaves are fleshy, shiny, and deeply loped, forming 3 leaflets. Ranunculus glacialis is reported to have a diploid chromosome number of 2n = 16.

Ranunculus repens, the creeping buttercup, is a flowering plant in the buttercup family Ranunculaceae, native to Europe, Asia and northwestern Africa. It is also called creeping crowfoot and sitfast.

Rapeseed, also known as rape and oilseed rape and canola, is a yellow-flowered member of the Brassicaceae family.

Rauvolfia tetraphylla is a plant in the family Apocynaceae, growing as a bush or small tree. It is commonly known as the be still tree or devil-pepper. The plant is native to Mexico, Central America, West Indies, and northern South America. It has been cultivated widely as both an ornamental and for use in traditional medicine. It is now naturalized throughout the tropics including Australasia, Indochina, and India.

The red raspberry leaf, also known as garden raspberry leaf, is produced by the deciduous raspberry plant and used in folk remedies.

Rehmannia glutinosa is a flowering broomrape, and one of the 50 fundamental herbs used in traditional Chinese medicine, where it has the name shēng dì huáng. It is often sold as gān dì huáng, gān meaning "dried". Unlike the majority of broomrapes, R. glutinosa is not parasitic, and is capable of independent photosynthesis.

Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum, is a species of herbaceous perennial plant in the knotweed and buckwheat family Polygonaceae. Common names include Japanese knotweed and Asian knotweed. It is native to East Asia in Japan, China and Korea. In North America and Europe, the species has successfully established itself in numerous habitats; it is classified as a pest and invasive species in several countries. The plant is popular with beekeepers and its young stems are edible, making it an increasingly popular foraged vegetable with a flavour described as lemony rhubarb.

Reynoutria sachalinensis, the giant knotweed or Sakhalin knotweed, is a species of Fallopia native to northeastern Asia in northern Japan and the far east of Russia.

Rhamnus cathartica, the European buckthorn, common buckthorn, purging buckthorn, or just buckthorn, is a species of small tree in the flowering plant family Rhamnaceae. It is native to Europe, northwest Africa and western Asia, from the central British Isles south to Morocco, and east to Kyrgyzstan. It was introduced to North America as an ornamental shrub in the early 19th century or perhaps before, and is now naturalized in the northern half of the continent, and is classified as an invasive plant in several US states and in Ontario, Canada.

Rhamphospermum nigrum, black mustard, is an annual plant native to cooler regions of North Africa, temperate regions of Europe, and parts of Asia..It is cultivated for its dark-brown-to-black seeds, which are commonly used as a spice.

Rheum ribes, the Syrian rhubarb or currant-fruited rhubarb, or warty-leaved rhubarb, is an edible wild rhubarb species in the genus Rheum. It grows between 1000 and 4000 m on dunite rocks, among stones and slopes, and is now distributed in the temperate and subtropical regions of the world, chiefly in Western Asia to Afghanistan and Pakistan and also in ladakh(Kargil) region of India. The Syrian rhubarb is a partially commercial vegetable collected from wild patches in Eastern and Southern Anatolia, Kurdistan, and partly Northwestern Iran in early spring. Rheum ribes is considered as a valuable medicinal species in herbal medicine.

Rhodiola rosea is a perennial flowering plant in the family Crassulaceae. It grows naturally in wild Arctic regions of Europe, Asia, and North America, and can be propagated as a groundcover.

Ledum was a genus in the family Ericaceae, including eight species of evergreen shrub native to cool temperate and subarctic regions of the Northern Hemisphere and commonly known as Labrador tea. It is now recognised as a subsection of section Rhododendron, subgenus Rhododendron, of the genus Rhododendron.

Rhododendron tomentosum, commonly known as marsh Labrador tea, northern Labrador tea, marsh rosemary or wild rosemary, is a flowering plant in the subsection Ledum of the large genus Rhododendron in the family Ericaceae.

Rhubarb is the fleshy, edible stalks (petioles) of species and hybrids of Rheum in the family Polygonaceae, which are cooked and used for food. The plant is a herbaceous perennial that grows from short, thick rhizomes. Historically, different plants have been called "rhubarb" in English. The large, triangular leaves contain high levels of oxalic acid and anthrone glycosides, making them poisonous and therefore inedible. The small flowers are grouped in large compound leafy greenish-white to rose-red inflorescences.

Rhus coriaria, commonly called Sicilian sumac, tanner's sumach, or elm-leaved sumach, is a deciduous shrub to small tree in the cashew family Anacardiaceae. It is native to southern Europe and western Asia. The dried fruits are used as a spice, particularly in combination with other spices in the mixture called za'atar.

Rhus taitensis is a small tree or shrub in the mango family Anacardiaceae. It is found from tropical Asia, to Australia and many islands of the Pacific Ocean. The chemical tetrahydroxysqualene from dried and ground parts of R. taitensis has in vitro activity against Mycobacterium tuberculosis and the plant has been used in folk medicine locally to treat diarrhea and hearing loss.

Ribes is a genus of approximately 200 known species of flowering plants, predominantly native to the temperate regions of the Northern Hemisphere. The genus includes species commonly referred to as redcurrants, blackcurrants, whitecurrants, and gooseberries. Several species are cultivated both for their edible fruit and as ornamental plants in horticulture. Ribes is the sole genus in the plant family Grossulariaceae.

Ribes burejense, commonly referred to as the Bureja gooseberry, is a species of flowering plant in the family Grossulariaceae, which includes currants and gooseberries. It is considered to be closely related to Ribes aciculare and shares several morphological characteristics with that species.

Richeria grandis is a tree species in the family Phyllanthaceae which ranges from the Lesser Antilles to South America. The species is reputed to have aphrodisiac properties.

Ricinodendron is a plant genus in the family Euphorbiaceae first described as a genus in 1864. It includes only one known species, Ricinodendron heudelotii, native to tropical Africa from Senegal + Liberia east to Sudan and Tanzania and south to Mozambique and Angola. It produces an economically important oilseed. The tree is known as munguella (Angola), njangsa (Cameroon), bofeko, wama (Ghana), okhuen (Nigeria), kishongo (Uganda), akpi, djansang, ọrùnmọdò (Yorubaland), essang, ezezang and njasang. Two varieties of the tree species are recognized R. heudelotii var. heudelotii in Ghana and R. heudelotii var. africanum in Nigeria and westwards.

Robinia pseudoacacia, commonly known as black locust, is a medium-sized hardwood deciduous tree, belonging to the tribe Robinieae of the legume family Fabaceae. It is native to a few small areas of the United States, but it has been widely planted and naturalized elsewhere in temperate North America, southern Europe, Southern Africa and Southern Asia and is considered an invasive species in some areas, such as the temperate east coast of Australia where the cultivar "Frisia" was widely planted as a street tree before being classed as a weed. Another common name is false acacia, a literal translation of the specific name.

Root vegetables are underground plant parts eaten by humans or animals as food. In agricultural and culinary terminology, the term applies to true roots, such as taproots and root tubers, as well as non-roots such as bulbs, corms, rhizomes, and stem tubers.

Rosa × centifolia, the Provence rose, cabbage rose, May rose or Rose de Mai, is a hybrid rose developed by Dutch breeders in the period between the 17th century and the 19th century, possibly earlier.

Rosa × damascena, more commonly known as the Damask rose, or sometimes as the Iranian Rose, Bulgarian rose, Taif rose, Emirati rose, Ispahan rose, and Castile rose, is a rose hybrid derived from Rosa gallica and Rosa moschata. DNA analysis has shown that a third species, Rosa fedtschenkoana, made some genetic contributions to the Damask rose.

Rosa × odorata or Rosa odorata is a hybrid flowering plant of the genus Rosa native to Yunnan in southwest China, whose taxonomy has been confused. It has been considered a hybrid of Rosa gigantea and Rosa chinensis, or as a quite rare wild species that includes R. gigantea. The wild forms are cultivated to some extent. Cultivars were developed in China in ancient times from R. chinensis crosses, and these have been important in the ancestry of the tea-scented China roses, also called tea roses, and their descendants the hybrid tea roses.

Rosa canina, the dog rose, is a variable climbing, wild rose species native to Europe, northwest Africa, and western Asia.

Rosa chinensis, known commonly as the China rose, Chinese rose, or Bengal rose, is a member of the genus Rosa native to Southwest China in Guizhou, Hubei, and Sichuan Provinces. The first publication of Rosa chinensis was in 1768 by Nikolaus Joseph von Jacquin in Observationum Botanicarum, 3, p. 7 & plate 55.

Rosa majalis is a species of deciduous shrubs in the genus Rosa, native to forests of Europe and Siberia. It grows to 2 m. and yields edible hip fruits rich in vitamin C, which are used in medicine and to produce rose hip syrup.

Rosa nutkana, the Nootka rose, bristly rose, or wild rose is a 0.6–3.0-metre-tall (2–10-foot) perennial shrub in the rose family (Rosaceae).

A rose is either a woody perennial flowering plant of the genus Rosa, in the family Rosaceae, or the flower it bears. There are over three hundred species and tens of thousands of cultivars. They form a group of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp prickles. Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through pinks, reds, oranges and yellows. Most species are native to Asia, with smaller numbers native to Europe, North America, and Northwest Africa. Species, cultivars and hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants range in size from compact, miniature roses to climbers that can reach seven meters in height. Different species hybridize easily, and this has been used in the development of the wide range of garden roses.

Roselle is a species of flowering plant in the genus Hibiscus that is native to Africa, most likely West Africa. In the 16th and early 17th centuries it was spread to Asia and the West Indies, where it has since become naturalized in many places. The stems are used for the production of bast fibre and the dried cranberry-tasting calyces are commonly steeped to make a popular infusion known by many names, including carcade.

Salvia rosmarinus, synonym Rosmarinus officinalis, commonly known as rosemary, is a shrub with fragrant, evergreen, needle-like leaves and purple or sometimes white, pink, or blue flowers. It is a member of the sage family, Lamiaceae.

Rubia is the type genus of the Rubiaceae family of flowering plants, which also contains Coffea (coffee). It contains around 80 species of perennial scrambling or climbing herbs and subshrubs native to the Old World.

Rubus crataegifolius, also called Korean raspberry, is a species of raspberry native to East Asia.

Rubus occidentalis is a species of Rubus native to eastern North America. Its common name black raspberry is shared with other closely related species. Other names occasionally used include bear's eye blackberry, black cap, black cap raspberry, and scotch cap.

Rubus sieboldii, the Molucca raspberry, is a flowering plant in the genus Rubus. The species is native to Japan, including the Ryukyu Islands. The shrubs prefer low wetland areas, with very good sun exposure, though the plants can tolerate moderate shade.

Ruellia tuberosa, also known as minnieroot, fever root, snapdragon root and sheep potato, is a species of flowering plant in the family Acanthaceae. Its native range is in Central America but it has become naturalized in Africa, South and Southeast Asia.

Rumex acetosella, commonly known as red sorrel, sheep's sorrel, field sorrel and sour weed, is a species of flowering plant in the buckwheat family Polygonaceae. Native to Eurasia including the British Isles, the plant and its subspecies are common perennial weeds. It has green arrowhead-shaped leaves and red-tinted deeply ridged stems, and it sprouts from an aggressive and spreading rhizome. The flowers emerge from a tall, upright stem. Female flowers are maroon in color.

Rumex crispus, the curly dock, curled dock or yellow dock, is a perennial flowering plant in the family Polygonaceae, native to Europe and Western Asia.

Rumex scutatus is a plant in the buckwheat family, used as a culinary herb. Its common names include French sorrel, buckler sorrel, shield-leaf sorrel, and sometimes the culinary name "green-sauce".

Ruta is a genus of strongly scented evergreen subshrubs, 20–60 cm (8–24 in) tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. The most well-known species is Ruta graveolens.

Ruta chalepensis is a species of flowering plant in the Rutaceae family known by the common name fringed rue. It is native to the Mediterranean and is found elsewhere as an introduced species. It is a perennial herb growing up to 80 centimeters tall. The leaves are compound, each divided into several segments which are subdivided into smaller leaflets. The inflorescence is a cluster of flowers, each with four or five bright yellow petals with rolled, fringed edges. The fruit is a textured capsule which is divided into pointed lobes.

Ruta graveolens, commonly known as rue, common rue, ruda, arruda or herb-of-grace, is a species of the genus Ruta grown as an ornamental plant and herb. It is native to the Mediterranean. It is grown throughout the world in gardens, especially for its bluish leaves, and sometimes for its tolerance of hot and dry soil conditions. It is also cultivated as a culinary herb, and to a lesser extent as an insect repellent and incense.

Sacred herbs are herbs that are considered sacred in some religions. Herbs such as myrrh, ague root, and frankincense in Christianity, Nine Herbs Charm in the partially Christianized Anglo-Saxon pagan, and a form of basil called tulsi—revered as a Hindu goddess for its medicinal value—are utilized in their rites and rituals.

Safflower, also false saffron, is a highly branched, herbaceous, thistle-like annual plant in the family Asteraceae. It is one of the world's oldest crops; today, it is commercially cultivated for vegetable oil extracted from the seeds. Plants are 30 to 150 cm tall with globular flower heads having yellow, orange, or red flowers. Each branch will usually have from one to five flower heads containing 15 to 20 seeds per head. Safflower is native to arid environments having seasonal rain. It grows a deep taproot which enables it to thrive in such environments.

Saffron is a spice derived from the flower of Crocus sativus, commonly known as the "saffron crocus". The vivid crimson stigma and styles, called threads, are collected and dried for use mainly as a seasoning and colouring agent in food. The saffron crocus was slowly propagated throughout much of Eurasia and was later brought to parts of North Africa, North America, and Oceania.

Sagittaria is a genus of about 30 species of aquatic plants whose members are referred to by the Native American word wapato and a variety of other common names, including arrowhead, duck potato, swamp potato, tule potato, and katniss. Most are native to South, Central, and North America, but there are also some from Europe, Africa, and Asia.

Sagittaria cuneata is a North American species of flowering plant in the water plantain family known by the common name arumleaf arrowhead or duck potato. Like some other Sagittaria species, it may be called wapato.

Sagittaria engelmanniana is a perennial aquatic plant growing up to 70 centimetres tall. The leaves are sagittate (arrow-shaped) with 3 very narrow lobes.

Sagittaria fasciculata, the bunched arrowhead is a plant found in a small number of wetlands in the Southeast United States.

Sagittaria longiloba is a North American species of flowering plant in the water plantain family known by the common name longbarb arrowhead and Gregg arrowhead.

Sagittaria macrocarpa, commonly called the large-fruited arrowhead, is an aquatic plant species known only from the US states of North Carolina and South Carolina.

Sagittaria macrophylla, common name papa de agua, is an aquatic plant species. It produces underground starchy tubers that are edible. It has large, hastate (arrow-shaped) leaves with blades up to 30 centimetres long. The terminal lobe is large and broadly lanceolate, while the two basal lobes are much smaller and narrower.

Sagittaria natans is a species of flowering aquatic plant in the water plantain family. It has floating leaves that are linear, heart-shaped or arrow-shaped.

Sagittaria papillosa, the nipplebract arrowhead, is a perennial plant species growing up to 120 centimetres tall. Petioles are triangular in cross-section, the leaf blade very narrowly elliptical to ovate, not lobed. The species is distinguished from others in the genus by having bumps (papillae) resembling nipples on the flower bracts.