Scientific name: raphanus sativus
Radishes are an edible root vegetable. They come in a variety of colors, with the most common being red and white. The root of the radish is crisp and has a sharp peppery flavour, with some radish varieties being hotter than others. Radishes are most commonly used in salads, and can be preserved by pickling them. Radish leaves and seeds are also edible but not as many people eat them as eat the root.
Scientific name: tribe: calameae
Rattan is a type of palm tree that grows like a vine. It grows very fast, and can grow up to a hundred metres long. Rattan is harvested mainly to make cane furniture from. It can be split into wicker for making woven furniture. Rattan is also used to make canes for whipping people as punishment in some countries.
Scientific name: centranthus ruber
Red valerian, also called Jupiter's beard, spur valerian or just valerian, is a pretty garden plant grown for its large spikes of pink flowers. It will tolerate drought, frost and highly alkaline soils - it can even grow in the cracks of a limestone wall. The whole plant is edible but is not particularly tasty. It can be confused with true valerian, which is an unrelated plant with medicinal properties.
Scientific name: ribes rubrum
Redcurrants are a small berry related to gooseberries that are from Europe. They are quite sour and are only used for making jams and other cooked food. A paler, less sour type of redcurrant is called the whitecurrant.
Reeds are tall, grassy plants found growing by waterways or in swamps. Reeds can be used for weaving baskets, for making boats, and for thatching houses.
Scientific name: rheum rhabarbarum
Rhubarb is a kind of plant with red, edible stems. The stems can be eaten raw, cooked into a sauce or cooked as filling for a pie. The leaves should not be eaten, as they are poisonous.
The rind of a fruit is the hard outer layer that you can't eat. Fruits like watermelon and oranges have rinds.
The roots of a plant are usually under the ground, holding the plant in place. The plant absorbs some food through its roots. The picture is of a tree where some of the dirt has washed away, so you can see its roots.
Scientific name: genus: rosa
The rose is a flowering plant, often seen in people's front yards. It is very prickly. Rose flowers are generally white, pink, yellow or red. People give each other gifts of bunches of roses if they really like each other.
Scientific name: rosmarinus officinalis
Rosemary is a woody evergreen herb that grows into a shrub up to about a metre and a half tall and much wider again. It can be clipped into a hedge or other topiary shapes. It has very strong smelling narrow leaves and purple flowers. It grows well in hot, dry conditions and most varieties tolerate heavy frosts. It does not like being overwatered. Rosemary goes very well with lamb dishes, but can be used to flavor a variety of other foods too.