Flowering plants, shrubs and trees provide the environment with much needed oxygen and fight soil erosion. They also provide food and shelter for many animals, as well as contribute to the fertility of soil with their dead leaves and flowers.
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Hibiscus, a large genus of herbs, shrubs, and small trees of the mallow family. There are more than 150 species, about 20 of which grow in the United States.
See more »Hickory, a nut-bearing tree of the same family as the walnuts. Eighteen species are native to North America, and two to China.
See more »Holly, an ornamental tree or shrub. There are nearly 300 species, mostly evergreens, throughout temperate and tropical regions of the world.
See more »Hollyhock, a tall, perennial, flowering herb. It is native to China, but is widely distributed in many temperate countries.
See more »Honeysuckle, an ornamental shrub or twining vine. The plant grows wild in damp woodlands, but is also cultivated for its attractive, usually fragrant, flowers and colorful berries.
See more »Hops, the female flowers of the hop vine, a perennial plant native to the Northern Hemisphere.
See more »Hornbeam, the name of several hardy trees of the birch family. Hornbeams are often cultivated for their ornamental foliage.
See more »Hornwort, any of a small class of green, flowerless plants that lack true roots, stems, and leaves.
See more »Horsetail, or Scouring Rush, a genus of perennial flowerless herbs. There are about 25 species, chiefly in Europe, Asia, and North America.
See more »Hound's-tongue, a coarse, weedy herb native to Europe and Asia and also found in the eastern United States.
See more »Houseleek, or Sempervivum, a genus of herbs native to Europe. There are about 65 species, found chiefly in mountainous areas.
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See more »Hyacinth, a spring-flowering bulb plant of the lily family. There are more than 30 species, chiefly native to the Mediterranean region.
See more »Hydrangea, an ornamental shrub grown chiefly for its large, showy flower clusters.
See more »Hyssop, an ornamental European herb that grows wild or as a garden plant in the United States.
See more »Impatiens, a genus of colorful plants. There are more than 500 species, most of which are found in tropical and temperate regions.
See more »Indian Paintbrush, or Painted Cup, a large genus of annual, biennial, and perennial herbs.
See more »Indian Pipe, a smooth, leafless, waxy white herbaceous plant. It is native to Asia and North America.
See more »Inkberry, an evergreen shrub that bears small, black berries. It is among several species in eastern North America that are sometimes called winterberries.
See more »Iris, a genus of perennial herbs native to temperate regions of the Northern Hemisphere.
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