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.

Alfalfa (Medicago sativa) is a perennial flowering plant in the legume family of Fabaceae. The common name alfalfa is mainly used in North America. In the rest of the world, this crop is called "lucerne." This plant looks similar to clover due to its purple flowers.

Arabian jasmine has much significance in many countries around the world. It is the national flower of both the Philippines and Indonesia. It is regularly used in ceremonial costumes and decorations in Sri Lanka, while in China it is the key ingredient in Jasmine tea. Hawaiians use arabian jasmine to make fragrant leis, and in Pakistan, Bangladesh and India it is used in garlands and hair adornments.

Desert rose is widely cultivated as a houseplant or as bonsai for its beautiful flowers. As a succulent plant originating from the Sahara and tropical Africa and Arabia, it requires a minimum temperature of 10 ℃ to survive. Its sap was used to poisoning arrows in Africa.

Singapore graveyard flower (Plumeria obtusa) is a plant species native to the West Indies and naturalized elsewhere. The singapore graveyard flower is grown for its showy, aromatic flowers, and in Cambodia the blossoms are used in religious offerings. This plant is most commonly cultivated in Southeast Asia.

Pomegranate (Punica granatum) is a deciduous shrub or small tree, native to western and southern parts of Asia. It has a long history of cultivation and rich symbolism in polytheistic religions. Fruits of pomegranate play an important role in many West Asian cuisines. Aside from culinary uses, this fruit-bearing shrub is also cultivated for ornamental purposes.

Apple of Sodom, or Calotropis procera, is an extremely poisonous plant. The fruit of this plant ripens and bursts, causing the seeds to scatter. In Jamaica, the fibers inside of the fruit are collected and used to stuff pillows.

Royal poinciana (Delonix regia) is also known as the “peacock tree” or the “flamboyant tree.” It’s a Madagascar native and is known for its brilliant crimson or red-yellow flowers. It grows exceedingly fast, reaching its maximum height of around 12 m in a short amount of time.

The peacock flower, Barbados' national flower, is a striking ornamental plant commonly grown in public and private gardens. Although the seeds of this flower are toxic if consumed, the fruits are edible. Some parts of this plant are used as medicine by Indonesians and West Indians. This plant is toxic to dogs and cats but provides food for butterflies and bees.

Garden balsam has been a favorite for European gardens since the Victorian era, although its flatter-flowered cousin has become increasingly more popular. The garden balsam attracts pollinators as well as nectar-feeding birds. The genus name, "Impatiens," which means, "impatient," references the plant's tendency to explosively throw its seeds away from itself.

The plumed cockscomb is a bright plant with recognizable red, pink, or purple flowers. It grows best in warm, tropical environments. Occasionally, plumed cockscomb is used as an ingredient in soap. In China and India, however, the plant is considered a pesky weed that reduces biodiversity.

Safflower (Carthamus tinctorius) is a branched, herbaceous, thistle-like annual plant native to arid environments in North America. In cooking, this plant is often used as a substitute for saffron, although it is considered an inferior substitute. In Japan, fiber makers use safflower to make a bright orange red dye.

White leadtree (Leucaena leucocephala) is a small tree native to Mexico and Central America. Planting white leadtree makes the soil fertile as other Legumes do. It has been also used for livestock feed and firewood. This tree is also called a "miracle tree" for its many uses.

Common hollyhock (Alcea rosea) is a stalk-flowering plant known for its height and attractive flowers. It regularly reaches head height or beyond - from 1.5 to 2.5 m tall. The presence of common hollyhock in a garden can also attract butterflies and hummingbirds.

Woman's tongue (Albizia lebbeck) is a deciduous tree that can grow to 30 m tall. It has a rounded canopy and gray, rough, cork-like bark. Blooms in spring with greenish yellow flowers. Produces long hanging seed pods. Invades pine lands and hammocks, disrupting the natural flora and fauna. The wood is naturally termite resistant and is often used in furniture making.

Onion (Allium cepa) is an onion species commonly known for its ubiquitous culinary applications. The onion is toxic to a variety of animals. Aside from its many culinary uses, the onion is often used to teach students how to use a microscope because its cells are very large and easy to visualize.

Scarlet pimpernel (Lysimachia arvensis) is a low-growing annual originally from Eurasia and North Africa. The flower is famous for the novel of the same name, written by Baroness Orczy. The flowers only open when the sun is shining, and have been known to close on overcast days. That’s why it’s also called shepherd’s weather glass.

Egyptian-privet (Lawsonia inermis) is a shrub or multi-stemmed tree that can grow from 1.8 to 5 m tall. Also known as the henna tree, it blooms in late spring or early summer with fragrant white flowers. Tolerant to both heat and drought, it thrives in warm climates with dry soil. It is used to produce henna dye, which comes from its leaves. It has become invasive in areas of China and Cuba.

Devil's trumpet (Datura metel) is a highly toxic annual species. Devil's trumpet ingestion can cause headaches, hallucinations, coma, and death. In spite of its toxicity, it is sometimes grown as an ornamental flower.

In warmer climates, the downy thorn-apple is an invasive perennial. In colder zones, it’s an annual that can be controlled. It is native to East Africa and is naturalized in China. It is not currently a problem in the United States, but it would become invasive if it were introduced. The reason for this is that the plant will quickly establish itself and spread rapidly. It is cultivated in gardens, but care must be taken to prevent it from overtaking other plants. The weed poses another threat: it is highly toxic to humans and animals. There are not any current bans on the sale, transport, or cultivation of the plant, but it is generally not encouraged.