helicteres isora
- n East Indian shrub often cultivated for its hairy leaves and orange-red flowers
heliamphora
- n genus of pitcher plants of the Guiana Highlands in South America
helianthemum
- n any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions
helianthemum canadense
- n perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts
helianthemum scoparium
- n woody yellow-flowered perennial of southeastern United States
helianthus
- n any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays
helianthus angustifolius
- n sunflower of eastern North America having narrow leaves and found in bogs
helianthus annuus
- n annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America
helianthus giganteus
- n very tall American perennial of central and the eastern United States to Canada having edible tuberous roots
helianthus laetiflorus
- n tall rough-leaved perennial with a few large flower heads; central United States
helianthus maximilianii
- n tall perennial of central United States to Canada having golden-yellow flowers