There are 171 herbs that start with the letter H, from Haba to Hyson. Below you will find them listed alphabetically along with some general information about each. Click the toggle view buttons in the top right corner to switch between the card and the table view.
For each item you will find the following information
Order: The subclass the herbs belongs to
Habitat: The places or type of weather the herbs lives in
Scientific name: The designation that scientists use to catalog the species
Name: Haba
Order: Fabales
Habitat: Mediterranean region
Scientific name: Vicia faba
Name: Habbenaria
Order: Orchidales
Habitat: Tropical and temperate regions
Scientific name: Habenaria spp.
Name: Habel's Woodsorrel
Order: Oxalidales
Habitat: Rocky areas of Brazil
Scientific name: Oxalis habellii
Name: Habenaria chlorantha
Order: Orchidales
Habitat: Asia and Africa
Scientific name: Habenaria chlorantha
Name: Haberlea
Order: Lamiales
Habitat: Southeastern Europe
Scientific name: Haberlea rhodopensis
Name: Hablitzia
Order: Caryophyllales
Habitat: Caucasus region
Scientific name: Hablitzia tamnoides
Name: Habrok
Order: Equisetales
Habitat: Aquatic in northern regions
Scientific name: Hippuris vulgaris
Name: Habuzo
Order: Asparagales
Habitat: Central Asia
Scientific name: Allium habuzo
Name: Hacama
Order: Caryophyllales
Habitat: Central Asia
Scientific name: Atriplex hortensis
Name: Hachenberry
Order: Rosales
Habitat: North America
Scientific name: Celtis spp.
Name: Hackberries
Order: Rosales
Habitat: North America
Scientific name: Celtis spp.
Name: Hackberry
Order: Rosales
Habitat: North America and Asia
Scientific name: Celtis
Name: Hackmatack
Order: Pinales
Habitat: North America
Scientific name: Larix laricina
Name: Hadd
Order: Rosales
Habitat: Middle East
Scientific name: Zizyphus spina-christi
Name: Haematoxylon
Order: Fabales
Habitat: Central America
Scientific name: Haematoxylon campechianum
Name: Hagenia
Order: Rosales
Habitat: East Africa
Scientific name: Hagenia abyssinica
Name: Hagenia abyssinica
Order: Rosales
Habitat: Africa
Scientific name: Hagenia abyssinica
Name: Hairbells
Order: Asterales
Habitat: Europe
Scientific name: Campanula glomerata
Name: Hairy Buttercup
Order: Ranunculales
Habitat: Grassy meadows and pastures
Scientific name: Ranunculus sardous
Name: Hairy Drymaria
Order: Caryophyllales
Habitat: Native to the southwestern United States and Mexico
Scientific name: Drymaria villosa
Name: Hairy Germander
Order: Lamiales
Habitat: Eurasia
Scientific name: Teucrium hircanicum
Name: Hairy Marjoram
Order: Lamiales
Habitat: Mediterranean region
Scientific name: Origanum majorana
Name: Hairy Nightshade
Order: Solanales
Habitat: Disturbed habitats and cultivated fields
Scientific name: Solanum villosum
Name: Hairy Smartweed
Order: Caryophyllales
Habitat: Moist areas and riverbanks
Scientific name: Persicaria hispida
Name: Hairy Sunflower
Order: Asterales
Habitat: Native to eastern and central North America
Scientific name: Helianthus hirsutus
Name: Hairy Vetch
Order: Fabales
Habitat: Europe and Asia
Scientific name: Vicia villosa
Name: Hairy Woodmint
Order: Lamiales
Habitat: Eastern North America
Scientific name: Blephilia hirsuta
Name: Hairy Woodrush
Order: Poales
Habitat: Native to Europe and Asia
Scientific name: Luzula pilosa
Name: Hairy-Fruited Sedge
Order: Poales
Habitat: North America
Scientific name: Carex trichocarpa
Name: Haitnaruka
Order: Rosales
Habitat: South America
Scientific name: Haitnaruka spp.
Name: Hakea
Order: Proteales
Habitat: Australia
Scientific name: Hakea spp.
Name: Halberd Bluebells
Order: Asterales
Habitat: Native to southeastern Europe
Scientific name: Campanula hallerana
Name: Halberd-Leaved Rose Mallow
Order: Malvales
Habitat: Wetlands and riverbanks
Scientific name: Hibiscus laevis
Name: Halberd-Leaved Tearthumb
Order: Caryophyllales
Habitat: Moist forests, swamps, streambanks
Scientific name: Polygonum arifolium
Name: Halberd-Leaved Violet
Order: Malpighiales
Habitat: Shaded, moist woodlands
Scientific name: Viola hastata
Name: Halbert-Leaf Goosefoot
Order: Caryophyllales
Habitat: Eurasia
Scientific name: Chenopodium glaucum
Name: Hale's Best Melon
Order: Cucurbitales
Habitat: North America
Scientific name: Cucumis melo
Name: Hale's Panic Grass
Order: Poales
Habitat: Open woodlands, prairies
Scientific name: Panicum haleanum
Name: Halesia
Order: Ericales
Habitat: Native to the southeastern United States
Scientific name: Halesia spp.
Name: Halimeda
Order: Bryopsidales
Habitat: Tropical marine environments, coral reefs
Scientific name: Halimeda spp.
Name: Halimium
Order: Cistales
Habitat: Mediterranean region
Scientific name: Halimium spp.
Name: Halleria
Order: Lamiales
Habitat: Subtropical and temperate forests
Scientific name: Halleria lucida
Name: Halleria lucida
Order: Lamiales
Habitat: Africa
Scientific name: Halleria lucida
Name: Halopeplis
Order: Caryophyllales
Habitat: Middle East
Scientific name: Halopeplis amplexicaulis
Name: Haloragis
Order: Saxifragales
Habitat: Coastal areas, wetlands
Scientific name: Haloragis erecta
Name: Halosarcia
Order: Caryophyllales
Habitat: Australia
Scientific name: Halosarcia spp.
Name: Hamadryas
Order: Ranunculales
Habitat: Alpine and subalpine regions
Scientific name: Hamadryas spp.
Name: Hamama
Order: Brassicales
Habitat: Europe and Asia
Scientific name: Sisymbrium officinale
Name: Hamamelis
Order: Saxifragales
Habitat: Eastern North America
Scientific name: Hamamelis virginiana
Name: Hamanasu Rose
Order: Rosales
Habitat: Asia
Scientific name: Rosa rugosa
Name: Hamatophyllin
Order: Bryales
Habitat: Tropical and subtropical forests
Scientific name: Hamatophyllum distichaceum
Name: Hami Melon
Order: Cucurbitales
Habitat: Cultivated in China, Central Asia
Scientific name: Cucumis melo var. reticulatus
Name: Hammada
Order: Caryophyllales
Habitat: Middle East and Central Asia
Scientific name: Hammada scoparia
Name: Hamosa
Order: Fabales
Habitat: Prairies, grasslands
Scientific name: Hamosa falcata
Name: Hana-Bogi
Order: Lamiales
Habitat: East Asia
Scientific name: Salvia plebeja
Name: Hanakatsura
Order: Rosales
Habitat: East Asia
Scientific name: Hovenia dulcis
Name: Hanbane
Order: Solanales
Habitat: Europe and Asia
Scientific name: Hyoscyamus niger
Name: Hanbio
Order: Rosales
Habitat: Asia
Scientific name: Elaeagnus umbellata
Name: Hanchinoko
Order: Lamiales
Habitat: Eurasia
Scientific name: Linaria vulgaris
Name: Handsome Harry
Order: Apiales
Habitat: Moist forests, meadows, roadsides
Scientific name: Heracleum lanatum
Name: Handsomeweed
Order: Asterales
Habitat: Mediterranean region
Scientific name: Dittrichia viscosa
Name: Hange
Order: Cucurbitales
Habitat: Asia
Scientific name: Trichosanthes cucumerina
Name: Hanger
Order: Cornales
Habitat: North America
Scientific name: Cornus alternifolia
Name: Hanging Sedge
Order: Poales
Habitat: Europe
Scientific name: Carex pendula
Name: Hanhui
Order: Asparagales
Habitat: China
Scientific name: Hanhui spp.
Name: Hanzhong
Order: Rosales
Habitat: China
Scientific name: Hanzhong spp.
Name: Haplocarpha
Order: Asterales
Habitat: Grasslands, rocky areas
Scientific name: Haplocarpha scaposa
Name: Haplopappus
Order: Asterales
Habitat: North and South America
Scientific name: Haplopappus spp.
Name: Haplophyllum
Order: Rutales
Habitat: Dry, sandy regions, deserts
Scientific name: Haplophyllum spp.
Name: Hardback
Order: Rosales
Habitat: Wetlands, coastal regions
Scientific name: Spiraea tomentosa
Name: Harebell
Order: Asterales
Habitat: Europe and North America
Scientific name: Campanula rotundifolia
Name: Harefoot Clover
Order: Fabales
Habitat: Native to Europe and Asia
Scientific name: Trifolium arvense
Name: Hargasseria
Order: Cyperales
Habitat: Tropical and subtropical forests
Scientific name: Hargasseria mexicana
Name: Harlequin Glory Bower
Order: Lamiales
Habitat: Moist forests and thickets
Scientific name: Clerodendrum trichotomum
Name: Harlequin Glory Pea
Order: Fabales
Habitat: Australia
Scientific name: Bossiaea heterophylla
Name: Harlequin Glory-bower
Order: Lamiales
Habitat: East Asia
Scientific name: Clerodendrum trichotomum
Name: Harlequin Sunflower
Order: Asterales
Habitat: Sandy or gravelly soils
Scientific name: Helianthus argophyllus
Name: Harmal
Order: Zygophyllales
Habitat: Temperate regions of Eurasia and North Africa
Scientific name: Peganum harmala
Name: Harnessflower
Order: Gentianales
Habitat: Native to parts of North America
Scientific name: Amsonia spp.
Name: Harpagophytum
Order: Lamiales
Habitat: Africa
Scientific name: Harpagophytum procumbens
Name: Harpagophytum procumbens
Order: Lamiales
Habitat: Southern Africa
Scientific name: Harpagophytum procumbens
Name: Harpalyke
Order: Laurales
Habitat: Atlantic rainforests of Brazil
Scientific name: Harpalyke brasiliensis
Name: Harpullia
Order: Sapindales
Habitat: Tropical and subtropical forests
Scientific name: Harpullia spp.
Name: Harrisonia
Order: Simaroubales
Habitat: Asia
Scientific name: Harrisonia spp.
Name: Harsh Cinquefoil
Order: Rosales
Habitat: Northern Hemisphere
Scientific name: Potentilla norvegica
Name: Harvest Brodiaea
Order: Asparagales
Habitat: Western North America
Scientific name: Brodiaea elegans
Name: Haschisch
Order: Rosales
Habitat: Central and Southern Asia
Scientific name: Cannabis sativa
Name: Hatha Jodi
Order: Arecales
Habitat: Tropical and subtropical regions
Scientific name: Phoenix loureiroi
Name: Hattora-Ogi
Order: Asparagales
Habitat: Mountainous regions of Asia
Scientific name: Allium victorialis
Name: Hautbois Strawberry
Order: Rosales
Habitat: Woodlands, meadows
Scientific name: Fragaria moschata
Name: Havo
Order: Rosales
Habitat: Mediterranean region
Scientific name: Laurocerasus officinalis
Name: Haw
Order: Rosales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Crataegus
Name: Haw Hawthorne
Order: Rosales
Habitat: Native to eastern North America
Scientific name: Crataegus flabellata
Name: Hawaiian Baby Woodrose
Order: Convolvulales
Habitat: Hawaii
Scientific name: Argyreia nervosa
Name: Hawaiian Lapacho
Order: Bignoniaceae
Habitat: Hawaii
Scientific name: Tabebuia impetiginosa
Name: Hawkbit
Order: Asterales
Habitat: Europe
Scientific name: Leontodon spp.
Name: Hawkweed
Order: Asterales
Habitat: Europe and North America
Scientific name: Hieracium spp.
Name: Hawthorn
Order: Rosales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Crataegus
Name: Hawthorn Berries
Order: Rosales
Habitat: Northern Hemisphere
Scientific name: Crataegus spp.
Name: Hawthorn Berry
Order: Rosales
Habitat: Temperate regions, often in hedgerows
Scientific name: Crataegus spp.
Name: Hawthorn Blueberry
Order: Ericales
Habitat: Mountainous regions
Scientific name: Vaccinium cylindraceum
Name: Hayseed Grass
Order: Poales
Habitat: Native to western North America
Scientific name: Pascopyrum smithii
Name: Hazel
Order: Fagales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Corylus
Name: Hazelwort
Order: Saxifragales
Habitat: Native to Europe
Scientific name: Asarum europaeum
Name: Heather
Order: Ericales
Habitat: Northern Europe and North America
Scientific name: Calluna vulgaris
Name: Heavenly Bamboo
Order: Berberidales
Habitat: Eastern Asia
Scientific name: Nandina domestica
Name: Heber's Sedge
Order: Poales
Habitat: North America
Scientific name: Carex heberi
Name: Hedge Bindweed
Order: Convolvulales
Habitat: Europe and Asia
Scientific name: Calystegia sepium
Name: Hedge Caraway
Order: Apiales
Habitat: Native to Europe and Asia
Scientific name: Peucedanum graveolens
Name: Hedge Garlic
Order: Brassicales
Habitat: Native to Europe and Asia
Scientific name: Alliaria petiolata
Name: Hedge Hyssop
Order: Lamiales
Habitat: Native to Europe and Asia
Scientific name: Gratiola officinalis
Name: Hedge Mustard
Order: Brassicales
Habitat: Europe and Asia
Scientific name: Sisymbrium officinale
Name: Hedge Mustard Greens
Order: Brassicales
Habitat: Native to Europe and Asia
Scientific name: Sisymbrium officinale
Name: Hedge Parsley
Order: Apiales
Habitat: Native to Europe and Asia
Scientific name: Torilis japonica
Name: Hekle-Flower
Order: Caryophyllales
Habitat: Europe and Asia
Scientific name: Consolida
Name: Heliotrope
Order: Boraginales
Habitat: Worldwide
Scientific name: Heliotropium spp.
Name: Hellebore
Order: Ranunculales
Habitat: Europe and Asia
Scientific name: Helleborus
Name: Hemlock
Order: Pinales
Habitat: North America and Asia
Scientific name: Tsuga
Name: Hemp
Order: Rosales
Habitat: Widely cultivated
Scientific name: Cannabis sativa
Name: Hen and Chickens
Order: Crassulales
Habitat: Europe and Asia
Scientific name: Sempervivum
Name: Hen's-Nest Fern
Order: Polypodiales
Habitat: Tropics and subtropics
Scientific name: Asplenium nidus
Name: Henbane
Order: Solanales
Habitat: Europe and Asia
Scientific name: Hyoscyamus niger
Name: Henné
Order: Myrtales
Habitat: North Africa and Southwest Asia
Scientific name: Lawsonia inermis
Name: Hepatica
Order: Ranunculales
Habitat: Native to Europe and North America
Scientific name: Hepatica nobilis
Name: Herb Bennet
Order: Rosales
Habitat: Native to Europe and Asia
Scientific name: Geum urbanum
Name: Herb Sophia
Order: Brassicales
Habitat: Native to Europe and Asia
Scientific name: Descurainia sophia
Name: Hickory
Order: Juglandales
Habitat: Eastern North America
Scientific name: Carya
Name: Hickory Nut
Order: Juglandales
Habitat: Native to eastern North America
Scientific name: Carya spp.
Name: Hierba Buena
Order: Lamiales
Habitat: North America
Scientific name: Mentha spicata
Name: Hierba de la Golondrina
Order: Malpighiales
Habitat: The Americas
Scientific name: Euphorbia prostrata
Name: Highbush Blueberry
Order: Ericales
Habitat: Native to eastern North America
Scientific name: Vaccinium corymbosum
Name: Highbush Cranberry
Order: Dipsacales
Habitat: Native to northern North America
Scientific name: Viburnum opulus var. americanum
Name: Himalayan Balsam
Order: Ericales
Habitat: Himalayan region
Scientific name: Impatiens glandulifera
Name: Himalayan Honeysuckle
Order: Dipsacales
Habitat: Himalayas
Scientific name: Leycesteria formosa
Name: Himalayan Knotweed
Order: Caryophyllales
Habitat: Native to the Himalayas
Scientific name: Persicaria wallichii
Name: Himalayan Mayapple
Order: Ranunculales
Habitat: Native to the Himalayas
Scientific name: Podophyllum hexandrum
Name: Himalayan Mulberry
Order: Rosales
Habitat: Native to the Himalayas
Scientific name: Morus macroura
Name: Himalayan Poppy
Order: Papaverales
Habitat: Himalayas
Scientific name: Meconopsis
Name: Himalayan Rhubarb
Order: Polygonales
Habitat: Native to the Himalayas
Scientific name: Rheum australe
Name: Hippocrepis
Order: Fabales
Habitat: Native to the Mediterranean region and western Asia
Scientific name: Hippocrepis spp.
Name: Hobby Horse
Order: Asterales
Habitat: Western North America
Scientific name: Hymenoxys hoopesii
Name: Hogweed
Order: Apiales
Habitat: Native to Europe and Asia
Scientific name: Heracleum spp.
Name: Hollyberry
Order: Aquifoliales
Habitat: Native to temperate regions of the Northern Hemisphere
Scientific name: Ilex spp.
Name: Hollyhock
Order: Malvales
Habitat: Eurasia
Scientific name: Alcea rosea
Name: Honesty
Order: Brassicales
Habitat: Native to central and southeastern Europe
Scientific name: Lunaria annua
Name: Honey Bush
Order: Proteales
Habitat: Southern Africa
Scientific name: Protea
Name: Honey Locust
Order: Fabales
Habitat: Native to central North America
Scientific name: Gleditsia triacanthos
Name: Honeysuckle Vine
Order: Dipsacales
Habitat: Native to the Northern Hemisphere
Scientific name: Lonicera spp.
Name: Hops
Order: Rosales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Humulus lupulus
Name: Horehound
Order: Lamiales
Habitat: Europe and Asia
Scientific name: Marrubium vulgare
Name: Hornbeam
Order: Fagales
Habitat: Temperate regions of the Northern Hemisphere
Scientific name: Carpinus
Name: Horned Poppy
Order: Papaverales
Habitat: Native to coastal regions of Europe and North Africa
Scientific name: Glaucium flavum
Name: Horse Mint
Order: Lamiales
Habitat: North America
Scientific name: Monarda
Name: Horse Radish
Order: Brassicales
Habitat: Europe and Asia
Scientific name: Armoracia rusticana
Name: Horsebrush
Order: Ericales
Habitat: Western North America
Scientific name: Tetradymia
Name: Horseradish
Order: Brassicales
Habitat: Europe and Asia
Scientific name: Armoracia rusticana
Name: Horsetail
Order: Equisetales
Habitat: Cosmopolitan
Scientific name: Equisetum
Name: Horseweed
Order: Asterales
Habitat: North America
Scientific name: Erigeron canadensis
Name: House Leek
Order: Crassulales
Habitat: Europe and Asia
Scientific name: Sempervivum tectorum
Name: Houseleek
Order: Saxifragales
Habitat: Native to Europe and Asia
Scientific name: Sempervivum spp.
Name: Houttuynia
Order: Piperales
Habitat: East Asia
Scientific name: Houttuynia cordata
Name: Hsiang-fu
Order: Asparagales
Habitat: Asia
Scientific name: Cyperus rotundus
Name: Huang Lian
Order: Ranunculales
Habitat: Eastern Asia
Scientific name: Coptis chinensis
Name: Huauzontle
Order: Caryophyllales
Habitat: Mexico
Scientific name: Chenopodium berlandieri
Name: Huckleberry
Order: Ericales
Habitat: Eastern North America
Scientific name: Gaylussacia
Name: Hummingbird Bush
Order: Ericales
Habitat: Central and South America
Scientific name: Justicia aurea
Name: Hummingbird Mint
Order: Lamiales
Habitat: North America
Scientific name: Agastache
Name: Hummingbird Trumpet
Order: Lamiales
Habitat: Western North America
Scientific name: Zauschneria californica
Name: Hyacinth
Order: Asparagales
Habitat: Mediterranean region
Scientific name: Hyacinthus orientalis
Name: Hydrangea
Order: Ericales
Habitat: Asia and the Americas
Scientific name: Hydrangea
Name: Hyson
Order: Lamiales
Habitat: Eurasia
Scientific name: Mentha spicata
| Name | Order | Habitat | Scientific name |
|---|---|---|---|
| Haba | Fabales | Mediterranean region | Vicia faba |
| Habbenaria | Orchidales | Tropical and temperate regions | Habenaria spp. |
| Habel's Woodsorrel | Oxalidales | Rocky areas of Brazil | Oxalis habellii |
| Habenaria chlorantha | Orchidales | Asia and Africa | Habenaria chlorantha |
| Haberlea | Lamiales | Southeastern Europe | Haberlea rhodopensis |
| Hablitzia | Caryophyllales | Caucasus region | Hablitzia tamnoides |
| Habrok | Equisetales | Aquatic in northern regions | Hippuris vulgaris |
| Habuzo | Asparagales | Central Asia | Allium habuzo |
| Hacama | Caryophyllales | Central Asia | Atriplex hortensis |
| Hachenberry | Rosales | North America | Celtis spp. |
| Hackberries | Rosales | North America | Celtis spp. |
| Hackberry | Rosales | North America and Asia | Celtis |
| Hackmatack | Pinales | North America | Larix laricina |
| Hadd | Rosales | Middle East | Zizyphus spina-christi |
| Haematoxylon | Fabales | Central America | Haematoxylon campechianum |
| Hagenia | Rosales | East Africa | Hagenia abyssinica |
| Hagenia abyssinica | Rosales | Africa | Hagenia abyssinica |
| Hairbells | Asterales | Europe | Campanula glomerata |
| Hairy Buttercup | Ranunculales | Grassy meadows and pastures | Ranunculus sardous |
| Hairy Drymaria | Caryophyllales | Native to the southwestern United States and Mexico | Drymaria villosa |
| Hairy Germander | Lamiales | Eurasia | Teucrium hircanicum |
| Hairy Marjoram | Lamiales | Mediterranean region | Origanum majorana |
| Hairy Nightshade | Solanales | Disturbed habitats and cultivated fields | Solanum villosum |
| Hairy Smartweed | Caryophyllales | Moist areas and riverbanks | Persicaria hispida |
| Hairy Sunflower | Asterales | Native to eastern and central North America | Helianthus hirsutus |
| Hairy Vetch | Fabales | Europe and Asia | Vicia villosa |
| Hairy Woodmint | Lamiales | Eastern North America | Blephilia hirsuta |
| Hairy Woodrush | Poales | Native to Europe and Asia | Luzula pilosa |
| Hairy-Fruited Sedge | Poales | North America | Carex trichocarpa |
| Haitnaruka | Rosales | South America | Haitnaruka spp. |
| Hakea | Proteales | Australia | Hakea spp. |
| Halberd Bluebells | Asterales | Native to southeastern Europe | Campanula hallerana |
| Halberd-Leaved Rose Mallow | Malvales | Wetlands and riverbanks | Hibiscus laevis |
| Halberd-Leaved Tearthumb | Caryophyllales | Moist forests, swamps, streambanks | Polygonum arifolium |
| Halberd-Leaved Violet | Malpighiales | Shaded, moist woodlands | Viola hastata |
| Halbert-Leaf Goosefoot | Caryophyllales | Eurasia | Chenopodium glaucum |
| Hale's Best Melon | Cucurbitales | North America | Cucumis melo |
| Hale's Panic Grass | Poales | Open woodlands, prairies | Panicum haleanum |
| Halesia | Ericales | Native to the southeastern United States | Halesia spp. |
| Halimeda | Bryopsidales | Tropical marine environments, coral reefs | Halimeda spp. |
| Halimium | Cistales | Mediterranean region | Halimium spp. |
| Halleria | Lamiales | Subtropical and temperate forests | Halleria lucida |
| Halleria lucida | Lamiales | Africa | Halleria lucida |
| Halopeplis | Caryophyllales | Middle East | Halopeplis amplexicaulis |
| Haloragis | Saxifragales | Coastal areas, wetlands | Haloragis erecta |
| Halosarcia | Caryophyllales | Australia | Halosarcia spp. |
| Hamadryas | Ranunculales | Alpine and subalpine regions | Hamadryas spp. |
| Hamama | Brassicales | Europe and Asia | Sisymbrium officinale |
| Hamamelis | Saxifragales | Eastern North America | Hamamelis virginiana |
| Hamanasu Rose | Rosales | Asia | Rosa rugosa |
| Hamatophyllin | Bryales | Tropical and subtropical forests | Hamatophyllum distichaceum |
| Hami Melon | Cucurbitales | Cultivated in China, Central Asia | Cucumis melo var. reticulatus |
| Hammada | Caryophyllales | Middle East and Central Asia | Hammada scoparia |
| Hamosa | Fabales | Prairies, grasslands | Hamosa falcata |
| Hana-Bogi | Lamiales | East Asia | Salvia plebeja |
| Hanakatsura | Rosales | East Asia | Hovenia dulcis |
| Hanbane | Solanales | Europe and Asia | Hyoscyamus niger |
| Hanbio | Rosales | Asia | Elaeagnus umbellata |
| Hanchinoko | Lamiales | Eurasia | Linaria vulgaris |
| Handsome Harry | Apiales | Moist forests, meadows, roadsides | Heracleum lanatum |
| Handsomeweed | Asterales | Mediterranean region | Dittrichia viscosa |
| Hange | Cucurbitales | Asia | Trichosanthes cucumerina |
| Hanger | Cornales | North America | Cornus alternifolia |
| Hanging Sedge | Poales | Europe | Carex pendula |
| Hanhui | Asparagales | China | Hanhui spp. |
| Hanzhong | Rosales | China | Hanzhong spp. |
| Haplocarpha | Asterales | Grasslands, rocky areas | Haplocarpha scaposa |
| Haplopappus | Asterales | North and South America | Haplopappus spp. |
| Haplophyllum | Rutales | Dry, sandy regions, deserts | Haplophyllum spp. |
| Hardback | Rosales | Wetlands, coastal regions | Spiraea tomentosa |
| Harebell | Asterales | Europe and North America | Campanula rotundifolia |
| Harefoot Clover | Fabales | Native to Europe and Asia | Trifolium arvense |
| Hargasseria | Cyperales | Tropical and subtropical forests | Hargasseria mexicana |
| Harlequin Glory Bower | Lamiales | Moist forests and thickets | Clerodendrum trichotomum |
| Harlequin Glory Pea | Fabales | Australia | Bossiaea heterophylla |
| Harlequin Glory-bower | Lamiales | East Asia | Clerodendrum trichotomum |
| Harlequin Sunflower | Asterales | Sandy or gravelly soils | Helianthus argophyllus |
| Harmal | Zygophyllales | Temperate regions of Eurasia and North Africa | Peganum harmala |
| Harnessflower | Gentianales | Native to parts of North America | Amsonia spp. |
| Harpagophytum | Lamiales | Africa | Harpagophytum procumbens |
| Harpagophytum procumbens | Lamiales | Southern Africa | Harpagophytum procumbens |
| Harpalyke | Laurales | Atlantic rainforests of Brazil | Harpalyke brasiliensis |
| Harpullia | Sapindales | Tropical and subtropical forests | Harpullia spp. |
| Harrisonia | Simaroubales | Asia | Harrisonia spp. |
| Harsh Cinquefoil | Rosales | Northern Hemisphere | Potentilla norvegica |
| Harvest Brodiaea | Asparagales | Western North America | Brodiaea elegans |
| Haschisch | Rosales | Central and Southern Asia | Cannabis sativa |
| Hatha Jodi | Arecales | Tropical and subtropical regions | Phoenix loureiroi |
| Hattora-Ogi | Asparagales | Mountainous regions of Asia | Allium victorialis |
| Hautbois Strawberry | Rosales | Woodlands, meadows | Fragaria moschata |
| Havo | Rosales | Mediterranean region | Laurocerasus officinalis |
| Haw | Rosales | Temperate regions of the Northern Hemisphere | Crataegus |
| Haw Hawthorne | Rosales | Native to eastern North America | Crataegus flabellata |
| Hawaiian Baby Woodrose | Convolvulales | Hawaii | Argyreia nervosa |
| Hawaiian Lapacho | Bignoniaceae | Hawaii | Tabebuia impetiginosa |
| Hawkbit | Asterales | Europe | Leontodon spp. |
| Hawkweed | Asterales | Europe and North America | Hieracium spp. |
| Hawthorn | Rosales | Temperate regions of the Northern Hemisphere | Crataegus |
| Hawthorn Berries | Rosales | Northern Hemisphere | Crataegus spp. |
| Hawthorn Berry | Rosales | Temperate regions, often in hedgerows | Crataegus spp. |
| Hawthorn Blueberry | Ericales | Mountainous regions | Vaccinium cylindraceum |
| Hayseed Grass | Poales | Native to western North America | Pascopyrum smithii |
| Hazel | Fagales | Temperate regions of the Northern Hemisphere | Corylus |
| Hazelwort | Saxifragales | Native to Europe | Asarum europaeum |
| Heather | Ericales | Northern Europe and North America | Calluna vulgaris |
| Heavenly Bamboo | Berberidales | Eastern Asia | Nandina domestica |
| Heber's Sedge | Poales | North America | Carex heberi |
| Hedge Bindweed | Convolvulales | Europe and Asia | Calystegia sepium |
| Hedge Caraway | Apiales | Native to Europe and Asia | Peucedanum graveolens |
| Hedge Garlic | Brassicales | Native to Europe and Asia | Alliaria petiolata |
| Hedge Hyssop | Lamiales | Native to Europe and Asia | Gratiola officinalis |
| Hedge Mustard | Brassicales | Europe and Asia | Sisymbrium officinale |
| Hedge Mustard Greens | Brassicales | Native to Europe and Asia | Sisymbrium officinale |
| Hedge Parsley | Apiales | Native to Europe and Asia | Torilis japonica |
| Hekle-Flower | Caryophyllales | Europe and Asia | Consolida |
| Heliotrope | Boraginales | Worldwide | Heliotropium spp. |
| Hellebore | Ranunculales | Europe and Asia | Helleborus |
| Hemlock | Pinales | North America and Asia | Tsuga |
| Hemp | Rosales | Widely cultivated | Cannabis sativa |
| Hen and Chickens | Crassulales | Europe and Asia | Sempervivum |
| Hen's-Nest Fern | Polypodiales | Tropics and subtropics | Asplenium nidus |
| Henbane | Solanales | Europe and Asia | Hyoscyamus niger |
| Henné | Myrtales | North Africa and Southwest Asia | Lawsonia inermis |
| Hepatica | Ranunculales | Native to Europe and North America | Hepatica nobilis |
| Herb Bennet | Rosales | Native to Europe and Asia | Geum urbanum |
| Herb Sophia | Brassicales | Native to Europe and Asia | Descurainia sophia |
| Hickory | Juglandales | Eastern North America | Carya |
| Hickory Nut | Juglandales | Native to eastern North America | Carya spp. |
| Hierba Buena | Lamiales | North America | Mentha spicata |
| Hierba de la Golondrina | Malpighiales | The Americas | Euphorbia prostrata |
| Highbush Blueberry | Ericales | Native to eastern North America | Vaccinium corymbosum |
| Highbush Cranberry | Dipsacales | Native to northern North America | Viburnum opulus var. americanum |
| Himalayan Balsam | Ericales | Himalayan region | Impatiens glandulifera |
| Himalayan Honeysuckle | Dipsacales | Himalayas | Leycesteria formosa |
| Himalayan Knotweed | Caryophyllales | Native to the Himalayas | Persicaria wallichii |
| Himalayan Mayapple | Ranunculales | Native to the Himalayas | Podophyllum hexandrum |
| Himalayan Mulberry | Rosales | Native to the Himalayas | Morus macroura |
| Himalayan Poppy | Papaverales | Himalayas | Meconopsis |
| Himalayan Rhubarb | Polygonales | Native to the Himalayas | Rheum australe |
| Hippocrepis | Fabales | Native to the Mediterranean region and western Asia | Hippocrepis spp. |
| Hobby Horse | Asterales | Western North America | Hymenoxys hoopesii |
| Hogweed | Apiales | Native to Europe and Asia | Heracleum spp. |
| Hollyberry | Aquifoliales | Native to temperate regions of the Northern Hemisphere | Ilex spp. |
| Hollyhock | Malvales | Eurasia | Alcea rosea |
| Honesty | Brassicales | Native to central and southeastern Europe | Lunaria annua |
| Honey Bush | Proteales | Southern Africa | Protea |
| Honey Locust | Fabales | Native to central North America | Gleditsia triacanthos |
| Honeysuckle Vine | Dipsacales | Native to the Northern Hemisphere | Lonicera spp. |
| Hops | Rosales | Temperate regions of the Northern Hemisphere | Humulus lupulus |
| Horehound | Lamiales | Europe and Asia | Marrubium vulgare |
| Hornbeam | Fagales | Temperate regions of the Northern Hemisphere | Carpinus |
| Horned Poppy | Papaverales | Native to coastal regions of Europe and North Africa | Glaucium flavum |
| Horse Mint | Lamiales | North America | Monarda |
| Horse Radish | Brassicales | Europe and Asia | Armoracia rusticana |
| Horsebrush | Ericales | Western North America | Tetradymia |
| Horseradish | Brassicales | Europe and Asia | Armoracia rusticana |
| Horsetail | Equisetales | Cosmopolitan | Equisetum |
| Horseweed | Asterales | North America | Erigeron canadensis |
| House Leek | Crassulales | Europe and Asia | Sempervivum tectorum |
| Houseleek | Saxifragales | Native to Europe and Asia | Sempervivum spp. |
| Houttuynia | Piperales | East Asia | Houttuynia cordata |
| Hsiang-fu | Asparagales | Asia | Cyperus rotundus |
| Huang Lian | Ranunculales | Eastern Asia | Coptis chinensis |
| Huauzontle | Caryophyllales | Mexico | Chenopodium berlandieri |
| Huckleberry | Ericales | Eastern North America | Gaylussacia |
| Hummingbird Bush | Ericales | Central and South America | Justicia aurea |
| Hummingbird Mint | Lamiales | North America | Agastache |
| Hummingbird Trumpet | Lamiales | Western North America | Zauschneria californica |
| Hyacinth | Asparagales | Mediterranean region | Hyacinthus orientalis |
| Hydrangea | Ericales | Asia and the Americas | Hydrangea |
| Hyson | Lamiales | Eurasia | Mentha spicata |