Maize (Zea mays) is a well known domesticated cereal grain first domesticated in Mexico. In much of the world it is also called corn. Worldwide cultivation of maize surpasses other prominent grains like wheat and rice. Maize must be planted in the spring due to its intolerance for cold weather.

Common lilac is a shrub native to the Balkan Peninsula that blooms with a fragrant blossom. It grows on rocky terrain and has a suckering habit. The blossoms are used to flavor honey, sugars, food, and other delights and farmed for its fragrant flowers in the spring.

Sycamore (Acer pseudoplatanus) is a tree native to Europe and Asia. Sycamore is tolerant of wind and coastal exposure. This species is known as the sycamore maple in the United States. Sycamore wood is commercially used to make musical instruments, furniture, joinery, wood flooring and kitchen utensils.

Sweet cherry is a well-known species to fruit lovers worldwide. This stone fruit varies in flavor from sweet to tart, depending on the specific cultivar. Sweet cherry is also used for lumber and is a preferred wood type for furniture.

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.

The oat (Avena sativa), a member of the grass family, is one of the most widely cultivated plants on earth, being used as a food crop, as livestock feed, and as an ingredient in cosmetics (especially lotions and soaps). Oats are nutrient-rich and provide more protein and fat than other grains. The plant is best grown in temperate climates with cool, wet summers, so the leading oat producers include Russia, Canada, and Spain.

Field maple (Acer campestre) is a deciduous flowering plant species native to continental Europe and western Asia. Field maple grows in plains, hills and along rivers. This species is grown as an ornamental tree in parks and gardens. Its wood is used to make flooring and musical instruments.

Elder is a malodorous shrub whose berries nevertheless act as an important food source for birds. To humans, except for its flowers and ripen fruits, other parts are poisonous. Ripen fruits can be cooked and made into jams, jellies and chutneys, while flowers could be made into syrups, but it is recommended to be guided by a professional before picking.

Common hazel (Corylus avellana) is a deciduous shrub species that is cultivated for its edible nuts. Hazelnuts can refer to the nut from any Corylus species, but it most often refers to Corylus avellana. The nuts from common hazel are eaten straight or used in making confectionary. Common hazel is native to Europe and western Asia.

The cypress spurge is an ornamental plant native to Europe. Because of its strong tendency to overrun the habitats of other species, this plant is classified as a noxious weed in various states, including Colorado. Although this plant attracts bees and other pollinators, some sections of it are hazardous and contain irritants.

European beech (Fagus sylvatica) is a large deciduous tree often used for ornamental purposes. European beech tends to out-compete other tree species, due to its dense canopy and tolerance to shade. Its wood is highly valued and has a very diverse use, including making furniture, musical instruments, for construction, as firewood, charcoal, and plywood.

The horse Chestnut was the tree that Anne Frank mentioned in her diary. While the original tree fell down in 2010, there have been new trees planted around the world from the original seeds. Horse Chestnut 's seeds resemble chestnuts, but they are inedible and toxic.

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.

The zanzibar gem is a flowering green plant native to eastern Africa. It also gets the name emerald palm because of its bright, glossy color. Today, the zanzibar gem (Zamioculcas zamiifolia) is grown around the world as a houseplant, in part because it is easy to grow and care for. Though this plant is mildly toxic if ingested, its danger level is often overstated.

Red clover is widely cultivated as a fodder plant and green manure because its roots can fix nitrogen and increase the fertility of the soil. The cultivated Trifolium pratense is inevitably escaped and is now naturalized globally, including the United States and Australia. Its flowers are attractive, so it is also cultivated as an ornamental plant.

English ivy is the most common climber of European forests. It is a perennial woody vine with evergreen, dark, shiny lobed leaves. It utilizes aerial rootlets to attach to the tree bark with exceptional strength, helping the english ivy creep more than 15 m up a tree. Hedera helix also grows as a forest groundcover and is invasive outside its native range.

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.

Dwarf umbrella tree (*Schefflera arboricola*) is an evergreen, multi-stemmed shrub native to China. It is commonly grown as a houseplant or a garden plant in milder climates for its decorative palmate compound leaves. The leaves contain calcium oxalates, which can damage internal organs when ingested. It shouldn't be confused with the Australian umbrella tree, *Schefflera actinophylla*.

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.