Chrysanthemums ( ), sometimes called mums or chrysanths, are flowering plants of the genus Chrysanthemum in the family Asteraceae.
 They are native to Asia and northeastern Europe.
 Most species originate from East Asia and the center of diversity is in China.
 There are countless horticultural varieties and cultivars.
Agastache nepetoides, the yellow giant hyssop, is a flower native to the United States and Canada.
 It is a member of the Lamiaceae family.
 It is endangered in Connecticut.
There are currently two symbols of the Brussels.
 Both the flag and the emblem of the Brussels-Capital Region depict the Iris pseudacorus (yellow iris), a flower native to the Brussels area.
 Additionally, every municipality of the region has its own flag and coat of arms.
Erythronium americanum (trout lily, yellow trout lily, yellow dogtooth violet) is a species of perennial, colony forming, spring ephemeral flower native to North America and dwelling in woodland habitats.
 Within its range it is a very common and widespread species, especially in eastern North America.
 The common name "trout lily" refers to the appearance of its gray-green leaves mottled with brown or gray, which allegedly resemble the coloring of brook trout.
Aquilegia coerulea is a species of "Aquilegia" flower native to the Rocky Mountains from Montana south to New Mexico and west to Idaho and Arizona.
 Its common name is Colorado blue columbine; sometimes it is called "Rocky Mountain columbine," but this properly refers to "Aquilegia saximontana".
Hibiscus laevis (syn.
 "Hibiscus militaris"), the halberd-leaf rosemallow, is a herbaceous perennial flower native to central and eastern North America.
 Their showy, creamy-white or pink flowers are large, up to 6 in across, and are hard to miss.
 These flowers require exposure to sunlight to open up properly, and then last only a single day.
Pollia japonica, known as East Asian pollia in English, Yabumyoga(ヤブミョウガ ) in Japanese, and dùruò(杜若 ) in Chinese, is a perennial flower native to East Asia.
 Its niche is forests 0–1200 m.
 It is native in Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, and Sichuan Provinces of China.
 Also found in Taiwan, Japan, and Korea.
Passiflora citrina is a species of Passion flower native to Central America.
 It is also grown as an ornamental plant.
Penstemon pallidus, the pale beardtongue, is a flower native to the eastern United States.
 It has been introduced to Canada.
Pyrethrum was a genus of several Old World plants now classified as "Chrysanthemum" or "Tanacetum" (e.g., "C. coccineum") 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.

Question: Pyrethrum is a genus of flower native to which continent?
Answer: Asia