Are Tweedia and Nematanthus both a genus of flowering plants?
Tweedia "Tweedia" is a genus of flowering plants in the Apocynaceae family, first described as a genus in 1835. The genus is native to South America. An ornamental plant, "Oxypetalum coeruleum", formerly included in this genus is commonly referred to as "tweedia".
Hemizonia Hemizonia is a genus of plants in the daisy family (Asteraceae). They are known generally as tarweeds, although some tarweeds belong to other genera, such as "Madia" and "Deinandra". Furthermore, "Hemizonia" is currently being revised; some species may be segregated into new genera.