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Genus Ozothamnus
- genus of Australian shrubs and perennial herbs; sometimes included in genus Helichrysum
Genus Packera
- genus of American of east Asian perennial herbs with yellow to orange or red flower rays; sometimes included in genus Senecio
Genus Parthenium
- small genus of North American herbs and shrubs with terminal panicles of small ray flowers
Genus Petasites
- genus of rhizomatous herbs of north temperate regions: butterbur; sweet coltsfoot
Genus Picris
- genus of weedy Old World yellow-flowered herbs usually containing a bitter-tasting substance: bitterweed
Genus Pilosella
- genus of hairy perennial herbs with horizontal rhizomes and leafy or underground stolons; Eurasia and North Africa; often considered congeneric with Hieracium
Genus Piqueria
- small genus of tropical American perennial herbs or subshrubs with white to pale yellow flowers; often included in genus Stevia
Genus Prenanthes
- genus of North American and Asiatic perennial herbs having pinnatisect leaves small heads of drooping yellowish to purple flowers; sometimes includes species often placed in genus Nabalus
Genus Pteropogon
- genus of Australian and South African herbs including some from genus Helipterum