Nerium oleander, colloquially known as oleander, is a shrub or a small tree, known for its majestic pink five-lobed flowers and deep green lanceolate leaves. Oleander is one of the most poisonous popular decorative garden plants, so it is advised to keep small children and pets away from it.

Mastic tree (Pistacia lentiscus) is an evergreen tree that will grow from 4 to 8 m tall and 4 to 8 m wide. Smells of strong resin it is grown commercially for its oil which is harvested between summer and fall. Produces small red mastic fruit that ripen and turn black in fall. Grows well in limestone and salty areas making it a good choice for coastal regions. Needs a wide area to grow makes a nice screen.

The pepper are commonly used for cooking in places such as the Southern U.S. and Central America. Most are moderately spicy, though because there are so many variants, the spice level can vary dramatically. Cayenne powder is also a popular seasoning product made from pepper plants.

Sweet chestnut (Castanea sativa) is a chestnut tree native to the southern region of Europe. The seeds of sweet chestnut are one of the most ancient foods. Sweet chestnut grows well in weathered soil at an acidic pH.

Spiny cocklebur (Xanthium spinosum) is largely considered a highly invasive weed that is found throughout the world. It produces prickly seed pods that become caught on passing animals and are then dispersed over a great distance. The burrs on the seed pods can damage sheep’s wool, making it an expensive weed for some farmers to deal with.

Tree heath is a small, erect tree with needle-like leaves. The flowers of this plant look like small bells and smell similar to honey which makes them appealing to pollinators. Native to Southern Europe, tree heath has spread to other parts of the world and is considered a weed in Australia.

Barrel clover (Medicago truncatula) is a self-fertilizing plant that resembles clover. It is a common food source for grazing livestock. Due to its peculiar genetic characteristics, like rapid generation and genetic transformation, it is used for genome sequencing. In terms of appearance, it has small dark-green leaves with a thin stem.

Chilean cestrum (Cestrum parqui) is a deciduous shrub. It blooms from summer to fall with fragrant, tubular-shaped yellow flowers that emit the strongest scent throughout the evening hours. Perfect for growing near an al fresco dining area or patio. It has been listed for years as a top plant by the Royal Horticultural Society, but can be invasive in warm climate areas.

Apple mint is widely known for the fruity fragrance and taste of its leaves. Some use them to add flavoring to teas, salads or garnish. It grows in moist soils and though it is also adaptable it won't prosper in dry ones. It is commonly grown as ground cover which helps stop the growth of weeds.

Bitter apple (*Solanum linnaeanum*), also known as the Devil's apple or Apple of Sodom, is a prickly, bushy plant of the nightshade family native to Southern Africa. It has a distinct tomato-shaped fruit which is toxic. In other warm parts of the world, bitter apple is invasive and can choke out native vegetation in regions such as Australia, New Zealand, the Pacific Islands, Saudi Arabia, and the Mediterranean.

Jerusalem thorn is a deciduous shrub native to the Mediterranean region. In the Bible, it is mentioned as the plant from which the crown of thorns was made that was placed on Jesus' head prior to his crucifixion. In the garden, it is often used as a hedge or border plant due to its thorny branches, which can help to deter animals and intruders. It is also a popular choice for xeriscaping, or landscaping in dry regions, as it is drought-tolerant and can thrive in poor soil conditions.

Giant reed, also known as Arundo donax, is a large ornamental grass that can grow in both standing water and well-drained soil. In warm climates, the plant can reach 6 m tall and grow long purple flowers. Reeds for musical instruments are made from this plant.

Sea squill is a flowering perennial that grows from a bulb. In the fall, the tall leaves die back and make way for the flower spike of red or white clustered petals. This plant is poisonous and has been used in the making of rat poison.

Bur clover is known by a number of names, including Medicago polymorpha, burr medic, and creeping burr. This legume is a green mulch, as it can correct nitrogen problems in soil, control erosion, and increase organic matter in the soil. It is an effective forage for sheep and can be used as an emergency forage if other crops fail. Bur clover carries the risk of becoming invasive.

An unusual plant, exploding cucumber is aptly named. When ripe, this plant shoots out a stream of liquid containing its seeds. Although it looks like a small cucumber, this plant is poisonous.

Native to the Mediterranean, the italian arum is cultivated as an ornamental plant and has been naturalized in a variety of places, including the Caucasus region, Argentina, and the United States. The berries and leaves are considered to be poisonous and should avoid ingesting.

Black alder (Alnus glutinosa) is indigenous to almost all of continental Europe. It’s used commercially in papermaking, in the manufacture of fiberboard, and in energy production. The bark of black alder has been used for hundreds of years in dyeing and tanning. The leaves of this species are so sticky, some people put them on the floor of their homes to trap fleas.

The garden nasturtium is often associated with the "Elizabeth Linnaeus Phenomenon", an optical illusion that makes the contrasting orange flowers and green foliage appear to flash brightly as it shakes in the wind. Garden nasturtium is cultivated as an ornamental plant. The disc-shaped leaves and seed pods are edible, usually getting used as garnishes and dressings.

The silver inch plant is a popular trailing plant known for its attractive foliage with zebra-like stripes of green, silver, and purple. Tradescantia zebrina is very easy to care for and can be hung or placed indoors. The plant grows fast; the creeping stems bear roots along the way, making it suitable as ground cover.

Portulaca oleracea, colloquially known as common purslane, is an annual succulent species with reddish stems and tiny yellow, five-petal flowers. It is used for culinary purposes in various parts of the world, most often raw, in salads. Common purslane is also a good companion plant for crops that thrive in moist soils.