common North American weed with linear leaves and small discoid heads of yellowish flowers
horseweed
Noun
erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers
hardheads
Noun
a weedy perennial with tough wiry stems and purple flowers
hawkweed
Noun
any of numerous often hairy plants of the genus Hieracium having yellow or orange flowers that resemble the dandelion
hawkweed
Noun
any of various plants of the genus Pilosella
hoary golden bush
Noun
western American shrubs having white felted foliage and yellow flowers that become red-purple
helianthus
Noun
any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays
head lettuce
Noun
distinguished by leaves arranged in a dense rosette that develop into a compact ball
horse thistle
Noun
European annual wild lettuce having prickly stems
hawkbit
Noun
any of various common wildflowers of the genus Leontodon
heliopsis
Noun
any North American shrubby perennial herb of the genus Heliopsis having large yellow daisylike flowers
hairy golden aster
Noun
hairy perennial with yellow flower heads in branched clusters
holy thistle
Noun
tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads
hortensia
Noun
very tall branching herb with showy much-doubled yellow flower heads
hortensia
Noun
deciduous shrub bearing roundheaded flower clusters opening green and aging to pink or blue
helleborine
Noun
any of several orchids of the genus Cephalanthera
helleborine
Noun
any of various orchids of the genus Epipactis
helleborine
Noun
any of several small temperate and tropical orchids having mottled or striped leaves and spikes of small yellowish-white flowers in a twisted raceme
helmet orchid
Noun
any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process
helmet orchid
Noun
any of numerous orchids of the genus Pterostylis having leaves in a basal rosette and green flowers often striped purple or brown or red with the dorsal sepal incurved to form a hood
harebell
Noun
perennial of northern hemisphere with slender stems and bell-shaped blue flowers
harebell
Noun
sometimes placed in genus Scilla
hooded ladies' tresses
Noun
orchid having dense clusters of gently spiraling creamy white flowers with 2 upper petals forming a hood
hairy finger grass
Noun
a European forage grass grown for hay
herbage
Noun
succulent herbaceous vegetation of pasture land
hardinggrass
Noun
perennial grass of Australia and South Africa
herd's grass
Noun
grass with long cylindrical spikes grown in northern United States and Europe for hay
hegari
Noun
Sudanese sorghums having white seeds
hog millet
Noun
extensively cultivated in Europe and Asia for its grain and in United States sometimes for forage
hard wheat
Noun
wheat with hard dark-colored kernels high in gluten and used for bread and pasta
hardstem bulrush
Noun
widely distributed North American sedge having rigid olive green stems
high mallow
Noun
erect or decumbent Old World perennial with axillary clusters of rosy-purple flowers
hardstemmed bulrush
Noun
widely distributed North American sedge having rigid olive green stems
hair grass
Noun
fine-leaved aquatic spike rush
hollyhock
Noun
any of various tall plants of the genus Alcea
hollyhock
Noun
any of various plants of the genus Althaea
hotei-chiku
Noun
small bamboo of southeastern China having slender culms flexuous when young
hibiscus
Noun
any plant of the genus Hibiscus
honey bell
Noun
African shrub having decumbent stems and slender yellow honey-scented flowers either solitary or in pairs
honeybells
Noun
African shrub having decumbent stems and slender yellow honey-scented flowers either solitary or in pairs
houhere
Noun
small tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordage
herbaceous plant
Noun
a plant lacking a permanent woody stem
hog cranberry
Noun
evergreen mat-forming shrub of North America and northern Eurasia having small white flowers and red berries
honeypot
Noun
South African shrub whose flowers when open are cup-shaped resembling artichokes
honeyflower
Noun
Australian shrub whose flowers yield honey copiously
honeyflower
Noun
erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar
honey-flower
Noun
Australian shrub whose flowers yield honey copiously
honey-flower
Noun
erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar
heartleaf manzanita
Noun
erect California shrub having leaves with heart-shaped lobes at the base