Johann Gottfried Zinn

Epipactis, or helleborine, is a genus of terrestrial orchids consisting of approximately 70 species. This genus is abbreviated as Epcts in horticultural trade.

Pyrethrum was a genus of several Old World plants now classified in either Chrysanthemum or Tanacetum which are cultivated as ornamentals for their showy flower heads. Pyrethrum continues to be used as a common name for plants formerly included in the genus Pyrethrum. Pyrethrum is also the name of a natural insecticide made from the dried flower heads of Chrysanthemum cinerariifolium and Chrysanthemum coccineum. The insecticidal compounds present in these species are pyrethrins.

Helminthotheca (commonly called ox-tongue) is a genus in the tribe Cichorieae of the family Asteraceae. Helminthotheca is closely related to the genus Picris, both within the Hypochaeridinae subtribe. Species Helminthotheca aculeata - Italy, Algeria, Morocco, Tunisia Helminthotheca balansae - Algeria, Morocco Helminthotheca comosa - Algeria, Morocco, southern Spain, Gibraltar Helminthotheca echioides (syn. Picris echioides) - widespread across much of Europe and the Mediterranean from Ireland + Canary Islands to Poland + Iran; naturalized in Australia, North and South America Helminthotheca

Seseli is a genus of herbaceous perennial plants in the family Apiaceae. They are sometimes woody at base with a conic taproot. Leaf blades are 1–3-pinnate or pinnately decompound. Umbels are compound, with bracts few or absent. Petals are white or yellow, and the fruit ovoid or ellipsoid. There are about 140 species in the genus.

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