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Genus Haplopappus
- genus of North and South American perennial herbs or shrubs with yellow flowers; in some classifications include species placed in other genera especially Hazardia
Genus Hazardia
- small genus of shrubs and subshrubs of western United States having flowers that change color as they mature
Genus Helenium
- genus of American herbs with flowers having yellow rays: sneezeweeds
Genus Helianthus
- genus of tall erect or branched American annual or perennial herbs with showy flowers: sunflowers
Genus Helichrysum
- large genus of mostly African and Australian herbs and shrubs: everlasting flowers; in some classifications includes genus Ozothamnus
Genus Helipterum
- genus of South African and Australian herbs or shrubs grown as everlastings; the various Helipterum species are currently in process of being assigned to other genera especially genera Pteropogon and Hyalosperma
Genus Heterotheca
- genus of yellow-flowered North American herbs
Genus Hieracium
- large genus of perennial hairy herbs of Europe to western Asia to northwestern Africa and North America; few are ornamental; often considered congeneric with Pilosella
Genus Homogyne
- small genus of low perennial herbs of montane Europe; in some classifications included in genus Tussilago