Calceolaria ( ), also called lady's purse, slipper flower and pocketbook flower, or slipperwort, is a genus of plants in the Calceolariaceae family, sometimes classified in Scrophulariaceae by some authors.
 This genus consists of about 388 species of shrubs, lianas and herbs, and the geographical range extends from Patagonia to central Mexico, with its distribution centre in Andean region.
 "Calceolaria" species have usually yellow or orange flowers, which can have red or purple spots.
 The "Calceolaria" Herbeohybrida group, also called "C. herbeohybrida" Voss, is a group of ornamental hybrids known only in cultivation, called florists slipperwort.
Arrhenatherum, commonly called oatgrass or button-grass, is a genus of Eurasian and North African plants in grass family.

Question: Are Calceolaria and Arrhenatherum both flowers?
Answer: no