''Knowltonia'' is a genus of the family

Ranunculaceae Ranunculaceae (buttercup or crowfoot family; Latin "little frog", from "frog") is a family of over 2,000 known species of flowering plants in 43 genera, distributed worldwide. The largest genera are ''Ranunculus'' (600 species), ''Delphinium' ...

. There are 25 species native to

South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...

and

Latin America Latin America or * french: Amérique Latine, link=no * ht, Amerik Latin, link=no * pt, América Latina, link=no, name=a, sometimes referred to as LatAm is a large cultural region in the Americas where Romance languages — languages derived f ...

. The juice from the stem of many of the species in the genus is a powerful

vesicant A blister agent (or vesicant), is a chemical compound that causes severe skin, eye and mucosal pain and irritation. They are named for their ability to cause severe chemical burns, resulting in painful water blisters on the bodies of those affe ...

Species include

IPNI accepts: the following species: * ''Knowltonia anemonoides'' H.Rasm. * ''Knowltonia assisbrasiliana'' (Kuhlm. & Porto) Christenh. & Byng * ''Knowltonia balliana'' (Britton) Christenh. & Byng * ''Knowltonia bracteata'' Harv. ex Zahlbr. * ''Knowltonia brevistylis'' Szyszyl. * ''Knowltonia caffra'' (Eckl. & Zeyh.) Christenh. & Byng ex Mosyakin & de Lange * '' Knowltonia capensis'' (L.) Huth * ''Knowltonia chilensis'' (Gay) Christenh. & Byng * ''Knowltonia cordata'' H.Rasm. * ''Knowltonia crassifolia'' (Hook.) Christenh. & Byng * ''Knowltonia fanninii'' (Harv. ex Mast.) Christenh. & Byng * ''Knowltonia filia'' (L.f.) T.Durand & Schinz * ''Knowltonia helleborifolia'' (DC.) Christenh. & Byng * ''Knowltonia hepaticifolia'' (Hook.) Christenh. & Byng * ''Knowltonia hootae'' Christenh. & Byng * ''Knowltonia integrifolia'' (DC.) Christenh. & Byng * ''Knowltonia major'' (Phil.) Christenh. & Byng * ''Knowltonia mexicana'' (Kunth) Christenh. & Byng * ''Knowltonia moorei'' (Espinosa) Christenh. & Byng * ''Knowltonia peruviana'' (Britton) Christenh. & Byng * ''Knowltonia sellowii'' (Pritz.) Christenh. & Byng * ''Knowltonia tenuifolia'' (L.f.) Mosyakin * ''Knowltonia transvaalensis'' Szyszyl. * '' Knowltonia vesicatoria'' (L.f.) Sims * ''Knowltonia whyteana'' (Baker f.) Engl.

References

Ranunculaceae Ranunculaceae genera {{Ranunculales-stub