Florist kalanchoe (Kalanchoe blossfeldiana) originates from Madagascar and has been a popular houseplant since the 1930s. Unlike most other succulents that are grown for their interesting leaves, Kalanchoe blossfeldiana is valued for the colorful flowerheads it produces in autumn and winter. This is the reason it is commonly gifted during holidays, earning it another name - Christmas kalanchoe. It is toxic to pets.

While the black locust may have a bad reputation in many areas of the US due to its opportunistic and rapid growth, there are benefits to this tree. The black locust is an important food source for honey bees and is a good choice for windbreaks since it grows so quickly (91 to 122 cm per year). Its wood also resists rot, so it is used in fenceposts. The plant is highly toxic, though, and should never be consumed.

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.

Chinese hibiscus is a small flowering tree. Its fragrant flowers are well known the world over, leading to many cultivated variants. Chinese hibiscus is the national flower of Malaysia and is featured on Malaysian coins. Although the Latin name, Hibiscus rosa-sinensis, means “the rose of China,” it is not related to true roses.

The peace lily gets its scientific name Spathiphyllum wallisii from a combination of the two Greek words ‘spath’ and ‘phyl’, which means spoon and leaves, respectively. The large graceful white spathe of the peace lily resembles a white flag, which is an international symbol of truce or peace.

Greater celandine (Chelidonium majus) is a plant species with distinctive golden-yellow flowers. It has been cultivated since the era of Pliny the Elder, in the first century. The greater celandine is actually a part of the poppy family, and like other species in that genetic family, it is well known for its recognizable, bright blooms. The yellow latex inside is equally recognizable, but is highly toxic if consumed.

Common yarrow is a wildflower that has feathery leaves and flowers in white, yellow or pink. In China, the plant is considered to be good luck while for some time in Scotland it was believed to have magical properties. It has been brewed into beer, tea, and liquors, but it has low toxicity. Do not consume in large quantities. Common yarrow's bitter leaves are toxic to pets and horses. Other livestock can eat it, though it gives cow milk an unpleasant flavor.

Jimsonweed (Datura stramonium) is a species of nightshade plant native to Central America which is considered an invasive species in more temperate climates. It can be toxic if ingested in significant quantities. It has a distinctive, strong smell. The jimsonweed gets its common name from Jamestown, Virginia, where soldiers ingested the plants exhibited altered mental states afterward.

The common daisy produces iconic flowers that are seen in European and American folklore dating back centuries. It is often a representation of childlike innocence. The plant is edible and can be used in small quantities in salads, sandwiches, soups, or tea. However, it can also become toxic and cause digestive problems if eaten in quantity.

The china rose (Rosa chinensis) is a Southwest China native. The plant has been cultivated for so long that it has become hard to tell the difference between wild and cultivated varieties. With medium-sized clusters of flowers and a long blooming season, it is easy to see why the china rose was chosen as the basis for many rose hybrids.

False christmas cactus gets its name from its flowering season; producing red purple pink or white flowers from fall to winter. Native to a small coastal strip on the east of Brazil this cactus prefers the shade and humidity of jungle conditions. In the wild hummingbirds pollinate the flowers.

Aegopodium podagraria, commonly known as ground elder, is a herbaceous perennial native to Eurasia. Origin of its common name lies in the shape of its leaves and flowers, somewhat similar to elderberry. Ground elder is often cultivated as an ornamental plant. Due to its fast spread via rhizomes, it is considered an invasive species in certain countries.

Evergreen candytuft (Iberis sempervirens) is a flowering plant native to Southern Europe. The Latin name Iberis sempervirens refers to the plant's appearance and means 'always green.' evergreen candytuft is popular in gardens due to the aesthetic value of its blossoms.

Siskiyou lewisia is a short shrub with striking spoon-shaped fleshy leaves arranged in a circular pattern. It has gorgeous funnel-shaped flowers with vibrant colors that bloom in late spring and summer. This plant naturally lives on rocky hills and cliffs in the American northwest. Americans have named Siskiyou lewisia after the explorer and decorated soldier Meriwether Lewis.

Pink-sorrel (Oxalis articulata) is a perennial flowering plant that grows in temperate climates throughout its native South America. Pink-sorrel is popular for ornamental ground cover growth in China and Turkey. It is susceptible to fungal disease.

The Delphinium elatum is a beautiful ornamental plant, which includes cultivars 'Magic Fountains', 'Dwarf Pacific', 'New Millennium', 'Pacific giant', and 6 varieties of 'Aurora'. It was first referred to as its scientific name by the Greek botanist and physician Pedanius Dioscorides.

Common sainfoin (Onobrychis viciifolia) is an erect, perennial, herbaceous legume that blooms in spring and in fall. Clusters of spiked blossoms bloom along a stem. Striped pink flowers attract a variety of bees. Seed pods form and have small spikes that cling to animal fur and help to propagate the plants in new locations.

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.

The chaste tree (Vitex agnus-castus) is a flowering shrub that thrives in subtropical regions. While it prefers full sun, it can grow with partial shade and tolerate temperatures as low as -23 ℃. The chaste tree has been cultivated in Europe dating back to Ancient Greece. Modern use focuses on creating essential oils from the leaves and fruits.

Creeping phlox (Phlox subulata) is a flowering plant native to the United States. The Latin name Phlox subulata means needle-shaped, which describes its leaves. Creeping phlox is sometimes confused with marijuana due to its similar smell.