Mexican marigold (Tagetes minuta) has become naturalized around the world ever since Spanish colonization. It needs full sun to flourish, and planting it around your garden will resist deer, yet attract butterflies and hummingbirds for you. People with sensitive skin should avoid touching it as its irritant sap can cause contact dermatitis.

Old man cactus (Cephalocereus senilis) is a cactus native to eastern Mexico. Old man cactus is widely cultivated in gardens and as a houseplant, resulting in dwindling numbers of old man cactus that grow in the wild. This species is popular due to its woolly appearance. Old man cactus grows best in well-drained soil and bright sunlight, which cause the hairlike fibers to grow.

The song of india has distinctive leaves that stay green year-round. The plant's unique appearance and low-maintenance nature make it popular as a houseplant. The song of india is native to Indian Ocean islands including Madagascar, though not, oddly, to India itself.

Gladiolus (Gladiolus gandavensis) is a perennial that blooms in summer with reddish-yellow flowers that bloom from bottom to top along a long flower stem. One of the first gladiolus hybrids, it led the way to development of modern-day gladiolus hybrids. Thrives in full sun in medium to moist, well-drained, organically rich soils.

Tree stonecrop (Sedum dendroideum) is a perennial shrub native to Mexico. It grows best in warm, arid environments, but it can survive in cooler climates. Tree stonecrop is naturalized in California within the United States and is often cultivated in gardens.

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.

Mexican fireplant is native to tropical America, but it has been naturalized in other tropical and subtropical regions in the world. *Euphorbia heterophylla* is a poisonous plant to humans and livestock. It contains a toxic milky sap which can cause strong skin irritation.

Mexican tea (Dysphania ambrosioides) is native to tropical parts of the Americas. Both the leaves and stems have tiny glands that give off a bad-smelling odor. It’s a weed that grows along the sides of roads and stream beds.

Rumex crispus, commonly known as curly dock, is a perennial plant that grows in temperate regions of the Northern Hemisphere. It is a very adaptable plant, flourishing in a variety of different habitats including roadsides, the edges of woodlands, meadows, and shorelines. Some moth species like to lay their eggs on curly dock leaves.

Persea americana, widely known as the avocado plant, is an evergreen tree (semi-deciduous in cooler climates) that is native to Central America. It is cultivated all over the world for its nutritious fruits. Avocado has become an important plant in many cuisines due to its high nutrient and fat content, creamy texture, and distinct taste.

Trailing jade (Peperomia rotundifolia) is a plant species also known as jade necklace, creeping buttons and round leaf Peperomia. Trailing jade is native to the tropical rainforest of South America. This species grows well in high humidity. Trailing jade is a popular houseplant. When growing trailing jade as a houseplant, care should be taken not to overwater this species.

Evergreen oak (Quercus ilex) is a plant species native to the Mediterranean region. The name "holly" originates from holm, its ancient name. This species is often planted in parks. In ancient times, evergreen oak was used to construct pillars, tools, and wagons. This species is one of three species used to establish truffle orchards. The oldest member of this species is estimated to be 1,200 years old and grows in Spain.

Argemone mexicana has been naturalized in many parts of the world. It is extremely tolerant of drought and poor soil, but is poisonous to grazing animals. Its seed pods secrete a pale yellow latex when cut open. In India, the mexican prickly poppy is used in the Holika Dahan festival, in which adults and children worship by offering flowers.

The mother of thousands is a succulent plant native to Madagascar. Its unusually-shaped leaves have granted it other monikers like "alligator plant" and "devil's backbone." It reproduces via the "plantlets" that grow along the periphery of its leaves. Though enjoyed for its decorative value, mother of thousands can be invasive in arid environments.

Graptoveria 'lovely rose' is a rare ornamental succulent. It got its cultivar name from the leaf clusters that form on top of its stem, making this plant look like a bundle of roses. It is used as an outdoor garden plant, since it needs full sun to stay healthy.

Elmleaf blackberry (Rubus ulmifolius) is a brambly flowering shrub native to Europe and North Africa. This species grows in hedges and woodland edges on calcareous soils. It bears fruits called drupes that are dark purple.

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.

Arrowhead plant (Syngonium podophyllum) is a beautiful foliage plant, one of the most popular species of the Araceae family. Due to its air purifying qualities and good looks, arrowhead plant is often cultivated as a houseplant. Every part of this plant is toxic, so it's best to keep it away from kids and pets.

Common primrose is a welcome sight in an early spring landscape. The vibrant colors of the flowers and a light, delicate scent make the common primrose a favorite. This plant provides vibrant color to any container or flowerbed, with hues available in yellow, pink, purple, blue, orange, red, white and bi-color.

Begonia cucullata is a native of South America. It is often used as a ground cover and also does well in containers. The blossoms of wax begonia can be red, white, or pink. In some states like Florida and Georgia, wax begonia is considered an invasive species due to its tendency to reseed prolifically in the right conditions.