Complete Plant Guide
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🗺️ Plants by City4121 plants found
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Golden aster
Heterotheca
Heterotheca is a genus of about 25 to 30 species of perennial herbs and subshrubs, native to North America, from Canada to Mexico, belonging to the aster family (Asteraceae). It is commonly known as "golden aster" or "camphorweed" due to the camphor-like aroma released by some species when their leaves are crushed. It produces bright yellow daisy-like flowers throughout much of the year and lanceolate leaves covered in rough hairs. It is a pioneer plant, extremely drought-tolerant, and typical of poor, sandy, or rocky soils.
Coral Bells
Heuchera
Heuchera, commonly known as coral bells or alumroot, is a genus of ornamental perennial plants native to North America. Celebrated for their extraordinary diversity of foliage colours — ranging from deep burgundy and bronze to lime green and silver — they produce delicate, airy wands of tiny bell-shaped flowers in spring and summer. Highly adaptable, Heuchera thrives in woodland gardens, borders, and containers, making it one of the most versatile shade perennials available to gardeners.
American Alumroot
Heuchera americana
Heuchera americana, commonly known as American Alumroot, is a native perennial of Eastern North America prized for its ornamental, deeply lobed foliage with silver-grey marbling. It produces delicate bell-shaped flowers on wiry stalks in late spring and thrives in shaded garden settings.
Crevice Alumroot
Heuchera micrantha
Heuchera micrantha, commonly known as crevice alumroot or small-flowered alumroot, is a herbaceous perennial in the family Saxifragaceae native to the rocky cliffs, talus slopes, and crevices of western North America, from British Columbia south to California. It forms low, mounding rosettes of deeply lobed, maple-like leaves in shades of green to bronzy-red, providing year-round ornamental interest. In late spring to early summer, slender wiry stems rise above the foliage bearing loose, airy panicles of tiny white to cream flowers that attract native bees and flies. It thrives in partial shade and well-drained, rocky soils, making it an excellent choice for rock gardens, shaded borders, and naturalistic plantings.
Coral bells
Heuchera sanguinea
Heuchera sanguinea is a clump-forming perennial in the saxifrage family (Saxifragaceae), native to Arizona, New Mexico and northern Mexico, where it grows among moist, shaded rocks. The leaves are rounded to heart-shaped, 7 to 15 cm long, and sit low to the ground. From late spring into early summer, thin stems rise well above the leaves carrying small red or pink bells, sometimes white, that draw hummingbirds and bees. The name sanguinea means "blood red", after the flowers. It is one of the species behind the colorful-leaved heucheras sold today.
Hairy Alumroot
Heuchera villosa
Heuchera villosa, commonly called hairy alumroot, is a clump-forming woodland perennial native to the Appalachian region of the eastern United States, from New York south to Georgia and west to Missouri. It forms low mounds of softly hairy, maple-like leaves and sends up airy spikes of tiny white to pink bell-shaped flowers from midsummer into fall. Prized for its outstanding heat and humidity tolerance compared to other coral bells, it thrives in shaded rock gardens, woodland borders, and containers.
Foamy Bells
Heucherella
Heucherella is an intergeneric hybrid between Heuchera (Coral Bells) and Tiarella (Foamflower), commonly known as 'Foamy Bells'. The plant forms compact leaf rosettes with colorful, decorative foliage in shades of green, gold, orange, red, and bronze—depending on the variety. It is particularly popular in shade gardens where it produces airy, cloud-like flower spikes in white and pink from late spring to midsummer. The foliage is semi-evergreen and provides winter structure in mild climates.
Rubber tree
Hevea brasiliensis
Hevea brasiliensis, commonly known as the rubber tree, is a species native to the Amazon rainforests (Amazon and Orinoco basins), where it can reach heights of 130 feet along riverbanks. It is the primary source of the world's natural rubber: an incision in its bark releases a white latex harvested through tapping starting around age 7. Introduced to Asia and Africa at the turn of the 20th century, it thrives there largely protected from its main threat, the Microcyclus ulei fungus, which causes South American Leaf Blight (SALB) that once devastated Brazilian rubber production. Indoors, grown for its glossy green trifoliate foliage, it remains much smaller in size. Its latex contains proteins (hevein) known to be allergenic: handling the sap can cause skin irritation or more severe reactions in individuals with latex allergies.
Guinea Flower
Hibbertia
Hibbertia is a genus of about 400 species in the family Dilleniaceae, almost all from Australia, with a few in New Guinea, New Caledonia, Fiji and Madagascar. They are called guinea flowers because the blooms resemble the old English gold guinea coin in colour and shape. Most are evergreen shrubs, often low and mat-forming, and a few are climbers, such as Hibbertia scandens (snake vine), whose stems reach over 3 m. The flowers have five petals, usually bright yellow, sometimes orange, and open one at a time through spring and summer.
Kenaf
Hibiscus cannabinus
Kenaf is a fast-growing, upright hibiscus relative in the mallow family, cultivated worldwide since prehistoric times for its strong bast fiber. It produces tall, cane-like stems topped with pale yellow, hibiscus-like flowers with dark purple centers, maturing from seed to full height in just three to four months.
Scarlet Rosemallow
Hibiscus coccineus
Hibiscus coccineus, commonly called scarlet rosemallow or Texas Star hibiscus, is a tall, deciduous perennial in the mallow family native to marshes and swamps of the southeastern United States. It produces striking star-shaped scarlet-red flowers up to 6 inches wide atop maple-like foliage from late summer into early fall, reaching 6-8 feet in height. It thrives in consistently moist to wet soil and full sun, making it a favorite for pond edges, rain gardens, and pollinator plantings.
Mandrinette
Hibiscus genevei
Hibiscus genevei (also spelled H. genevii) is a shrub in the mallow family, Malvaceae, endemic to the island of Mauritius in the Indian Ocean. It grows 2-3 m tall with elliptic leaves 4-7 cm long and solitary flowers on long stalks, with five spreading petals in white to pale pink and a red centre, often over 10 cm across. It was thought extinct for about 150 years until it was rediscovered in 1968, and it is now a very rare plant grown mainly in conservation nurseries and botanic gardens.
Halberdleaf Rosemallow
Hibiscus laevis
Hibiscus laevis is a stout, upright herbaceous perennial native to North American wetland margins, named for its distinctive three-lobed, halberd-shaped leaves. From summer into fall it bears large, hollyhock-like flowers in white to pink with a deep maroon throat that open by day and close at night.
Swamp Rose-mallow
Hibiscus moscheutos
Hibiscus moscheutos, commonly known as Swamp Rose-mallow or Crimson-eyed Rosemallow, is a hardy perennial native to eastern North America. It produces enormous dinner-plate blooms — up to 12 inches across — in shades of white, pink, red, and burgundy, often with a striking crimson eye. Despite its tropical appearance, it is fully cold-hardy to USDA Zone 4, dying back to the ground each winter and re-emerging in spring.
Confederate Rose
Hibiscus mutabilis
Confederate Rose (Hibiscus mutabilis) is a fast-growing deciduous shrub or small tree native to southern China. It is celebrated for its spectacular flowers that open white or pale pink in the morning and deepen to rich crimson red by evening — all within a single day. Plants can reach 15 feet tall and produce abundant blooms from late summer through fall.
Chinese Hibiscus
Hibiscus rosa-sinensis
Hibiscus rosa-sinensis, commonly known as Chinese Hibiscus or Tropical Hibiscus, is a flowering evergreen shrub in the family Malvaceae, native to tropical Asia. It produces large, showy flowers in a wide range of colors throughout the year and is widely cultivated as an ornamental plant in gardens and containers worldwide.
Roselle
Hibiscus sabdariffa
Hibiscus sabdariffa, commonly known as Roselle, is a fast-growing annual or short-lived perennial shrub native to West Africa. It is celebrated worldwide for its vibrant red calyces used to make hibiscus tea, jams, and medicinal preparations. The plant produces striking pale yellow flowers with a deep red center and grows up to 3 meters tall in warm climates. Its calyces, leaves, seeds, and roots are all edible and valued both ornamentally and medicinally.
Rose of Sharon
Hibiscus syriacus
Rose of Sharon (Hibiscus syriacus) is a deciduous flowering shrub native to East Asia, widely grown for its showy blooms in shades of white, pink, purple, red, and lavender. It blooms from midsummer through fall, bridging a gap when few other shrubs are in flower. It is the national flower of South Korea, known as Mugunghwa, symbolizing perseverance and eternal love.
Hawkweed
Hieracium
Hieracium is a large, taxonomically complex genus of flowering plants in the daisy family (Asteraceae), commonly known as hawkweed. The genus name comes from the ancient Greek 'hierax' (hawk), tied to an old legend that hawks used the plant's milky sap to sharpen their eyesight. Hawkweeds are herbaceous perennials that form basal rosettes of hairy, often bristly leaves and send up erect flowering stems topped with clusters of small, dandelion-like yellow or orange flower heads. Reproduction is unusual: most species reproduce apomictically, producing genetically identical seeds without fertilization, which has led botanists to describe anywhere from a few hundred to several thousand microspecies. While some Hieracium species are valued as low-maintenance wildflowers for naturalized gardens and pollinator plantings, many others (such as orange hawkweed and meadow hawkweed) are aggressive colonizers classified as noxious, invasive weeds in North America, New Zealand, and parts of Australia, where they outcompete native vegetation and forage grasses.
Narrowleaf Hawkweed
Hieracium umbellatum
Narrowleaf hawkweed is a perennial herb in the Asteraceae family, native to temperate regions across the Northern Hemisphere (Europe, Asia, and North America). It forms a basal rosette with narrow, toothed leaves and produces umbrella-shaped clusters of dandelion-like yellow flowerheads from mid-summer to fall. It is a hardy, adaptable plant commonly found along roadsides, in open woodlands, and on sandy or disturbed ground.
Monkey's Tail Cactus
Hildewintera colademononis
Hildewintera colademononis, also classified as Cleistocactus colademononis, is an epiphytic and pendulous cactus native to the moist rocky slopes of Florida province in the Santa Cruz department of Bolivia, where it grows hanging from cliffs at altitudes of up to 1,500 meters. Its cylindrical stems, 3 to 7 cm in diameter, can reach up to 2.5 meters in length and are covered by dozens of white, thin, and hair-like soft spines that resemble a monkey's furry tail—the origin of its popular nickname. Between spring and summer, it produces vibrant red flowers up to 8 cm long that bloom almost horizontally along the stems. It is a relatively fast-growing species, ideal for hanging baskets, and has received the prestigious Award of Garden Merit from the Royal Horticultural Society.
Amaryllis / Hippeastrum (genus)
Hippeastrum
Hippeastrum is a genus of large, bulbous perennial plants in the family Amaryllidaceae, native to tropical and subtropical regions of South America. Commonly — though inaccurately — known as Amaryllis, these plants produce spectacular trumpet-shaped flowers in shades of red, pink, white, orange, and salmon, typically blooming in winter and spring. The genus comprises over 116 species and hundreds of hybrid cultivars. All parts, especially the bulb, contain lycorine alkaloids making them toxic to pets and humans.
Barbados lily
Hippeastrum puniceum
Hippeastrum puniceum, the Barbados lily, is a bulbous plant in the Amaryllidaceae family native to tropical South America and the Caribbean, grown in warm-climate gardens for centuries (it is also sold as Hippeastrum equestre). The 4 to 5 cm bulb produces strap-shaped leaves 25 to 60 cm long and hollow stalks 30 to 60 cm tall carrying 2 to 4 trumpet flowers, 8 to 12 cm across, red-orange with a greenish-white throat. In warm climates it blooms much of the year and rests in winter. It is one of the wild species behind many hybrid amaryllis. The whole bulb contains alkaloids such as lycorine and is toxic if eaten.
Mexican Lily
Hippeastrum reginae
Hippeastrum reginae, commonly known as Mexican Lily or Amaryllis, is a bulbous perennial from the Amaryllidaceae family, native to tropical and subtropical regions of South America. It produces spectacular trumpet-shaped flowers in shades of red, pink, white, orange, and bicolor on upright stems reaching up to 60 cm tall. Widely grown as an ornamental plant in pots and gardens, it is particularly prized for its vibrant winter and spring blooms.
Striped Barbados Lily
Hippeastrum striatum
The Striped Barbados Lily (Hippeastrum striatum) is a bulbous flowering perennial native to eastern and southern Brazil, belonging to the Amaryllidaceae family. It produces sturdy flower stalks bearing 2 to 4 trumpet-shaped blooms, bright red with a distinctive green keel running halfway up each petal. It is a popular ornamental bulb prized for its striking late-winter to early-spring flowering display.
Amaryllis
Hippeastrum vittatum
Amaryllis (Hippeastrum vittatum) is a bulbous plant native to South America, belonging to the Amaryllidaceae family. It is distinguished by its large, showy trumpet-shaped flowers that can reach up to 20 cm in diameter. It is one of the most popular bulbous plants for indoor cultivation, especially during winter and spring.
Star of Bethlehem
Hippobroma longiflora
Hippobroma longiflora, commonly known as Star of Bethlehem, is a perennial herb with an erect or decumbent stem, native to Jamaica and now naturalized in humid tropical and subtropical regions, typically along stream banks and ditches. Its leaves are simple, alternate, elliptical to lanceolate in shape with serrated edges, measuring 5 to 15 cm in length. The flowers are solitary, white, and fragrant, with a slender floral tube 6 to 12 cm long ending in five pointed lobes—an adaptation for pollination by long-tongued sphinx moths. It is considered one of the most dangerous plants to cultivate: the entire plant, especially the milky sap, contains pyridine alkaloids such as lobeline and nicotine. Contact with the sap causes intense burning on the skin and mucous membranes and can cause temporary blindness if it reaches the eyes; ingestion is dangerous for humans and animals (including cattle, dogs, and cats), potentially causing vomiting, tremors, muscle paralysis, and, in severe cases, death.
Manchineel (genus)
Hippomane
Hippomane is a small genus in the spurge family (Euphorbiaceae) with three species of trees and shrubs from tropical America. Best known is the manchineel (Hippomane mancinella), native to southern Florida, the Caribbean, Mexico, Central America, northern South America and the Galápagos; the other two, H. horrida and H. spinosa, grow only on Hispaniola. Manchineel grows on beaches, dunes and mangrove edges as a tall shrub or tree up to 15 m, with fissured grey-brown bark, glossy leaves 5-10 cm long and spikes of tiny yellow-green flowers. Its fruits look like small green apples, 2.5-5 cm across, and smell sweet. It is considered one of the most dangerous trees in the world: every part is extremely poisonous. The milky sap burns skin and eyes, and eating the fruit can kill. It is listed as endangered in Florida, and its roots help hold beach sand against erosion.
Sea buckthorn
Hippophae rhamnoides
Sea buckthorn (Hippophae rhamnoides) is a thorny deciduous shrub from the Elaeagnaceae family, native to the cold and temperate regions of Eurasia—ranging from the coasts of the Baltic and North Seas to the Himalayan foothills. It is characterized by silvery-gray narrow leaves and bright orange berries that densely cover the branches from late summer to autumn, which are highly valued for their vitamin C content and other antioxidants. It is a dioecious plant (separate male and female individuals), extremely resistant to frost, drought, wind, and salty coastal air.
Hohenbergia
Hohenbergia
Hohenbergia is a genus of bromeliads in the family Bromeliaceae, comprising roughly 53 species native to the West Indies, the Yucatan Peninsula, and northern South America (Colombia, Venezuela, Brazil). Plants form rosettes of broad, stiff, often spine-edged strap-like leaves that converge at the base into a central "tank" that holds water and organic debris. A single tall, showy flower spike is produced from the rosette center, lasting for months, with bracts and flowers in shades of red, salmon, pink, white, or purple — the feature that most distinguishes the genus from its close relative Aechmea.
Bleeding Heart Tree
Homalanthus
Homalanthus is a genus of fast-growing tropical trees and shrubs in the family Euphorbiaceae, native to Australia, Papua New Guinea, and Pacific islands. These pioneer plants rapidly colonize disturbed forest edges and clearings, playing a critical role in tropical forest regeneration. They feature large, heart-shaped leaves that turn vivid red before dropping, and produce milky white latex throughout their tissues. Several species, notably Homalanthus nutans, have attracted significant scientific interest for containing prostratin — a compound with demonstrated antiviral and anti-HIV activity derived from traditional Samoan ethnobotanical knowledge.
Homalomena
Homalomena
Homalomena is a genus of roughly 150 tropical aroid species native to Southeast Asia and parts of tropical South America, prized as houseplants for their glossy, heart- or shield-shaped foliage. This is a genus-level profile covering common cultivated species such as Homalomena rubescens and its cultivars ("Emerald Gem", "Selby"); individual species vary somewhat in mature size and leaf color.
King of hearts
Homalomena rubescens
Homalomena rubescens is an evergreen, rhizomatous aroid related to philodendrons, native to Assam, Sikkim, Bangladesh and Myanmar, where it grows on the moist floor of tropical forest. It forms a clump of glossy, heart-shaped green leaves on long wine-red stalks, often reddish underneath. The inflorescence sits close to the ground: a burgundy-red spathe around a white spadix. Indoors it reaches 30-90 cm tall and about 60 cm wide, growing at a moderate pace. It is sold as King of hearts and as the cultivar 'Maggy'. All parts contain calcium oxalate crystals.
Barleys
Hordeum
Hordeum is the barley genus, with 30 to 40 species of annual and perennial grasses from the temperate regions of Africa, Eurasia and the Americas. The best known is cultivated barley (Hordeum vulgare), one of the oldest cereals, grown for food, animal feed and malt for beer and whisky. The genus also includes foxtail barley (Hordeum jubatum), planted as an ornamental grass for its silky heads, and wall barley (Hordeum murinum), a common weed of waste ground. Plants reach up to 1.6 m and carry spikes with long awns, the bristles that give the genus its name.
Wall barley
Hordeum murinum
Wall barley is a low, tufted annual grass in the barley genus, native to the Mediterranean, Central Europe, Western Asia, and North Africa, and now widely naturalized across temperate regions worldwide. It grows 30-50 cm tall, forming unbranched spikes up to 10 cm long that ripen from green to straw-yellow. A classic plant of disturbed, nitrogen-rich ground, it thrives in pavement cracks, walls, roadsides, and waste areas, flowering from May through July. Though a difficult weed in cereal fields and pastures, it also serves as forage for grazing livestock in dry regions.
Barley
Hordeum vulgare
Barley (Hordeum vulgare) is one of the oldest domesticated cereal grains, originating in the Fertile Crescent of the Middle East roughly 10,000 years ago. It is a hardy annual grass widely grown for malting, brewing, animal feed, and human food, and remains one of the world's major cereal crops.
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