Lasiurus is a genus of Asian and African plants in the grass family, found primarily in arid regions.
 The only known species is Lasiurus scindicus, native to drier regions of northern Africa and southwestern Asia, from Morocco and Mali to India.
Rydingia is a genus of plants in the Lamiaceae family, first described in 2007.
 The genus is native to eastern Africa and southwestern Asia.
Castellia is a genus of African and Eurasian plants in the grass family.
 The only known species is Castellia tuberculosa, native to southern Europe (Spain, Sardinia, Greece), northern and northeastern Africa (Algeria, Libya, Morocco, Tunisia, Djibouti, Eritrea, Somalia, Sudan), and southwestern Asia (Saudi Arabia, Oman, Persian Gulf Sheikdoms, Iran, Pakistan, Punjab State of India).
Urochondra is a genus of plants in the grass family.
 The only known species is Urochondra setulosa, native to northeastern Africa (Djibouti, Eritrea, Sudan, Somalia, Socotra) and southwestern Asia (Saudi Arabia, Oman, Yemen, northwestern India, and Sindh Province in Pakistan).
 The species grows in coastal sand dunes, salt marshes and estuaries.
Moluccella is a genus of annual and short-lived perennial plants native to Central + southwestern Asia and the Mediterranean.
 They are tall, upright, branched plants to 1 meter or more with toothed leaves and small white fragrant flowers.
Cassiope is a genus of 9-12 small shrubby species in the family Ericaceae.
 They are native to the Arctic and north temperate montane regions.
 The genus is named after Cassiopeia of Greek mythology.
 Common names, shared with several other similar related genera, include heather and heath.
 They have scale-like leaves lying against the stems, and produce solitary bell-shaped flowers in late spring.
 Though hardy, flowers can be damaged by late frosts.
Fontanesia is a genus of flowering plants in the family Oleaceae, usually treated as comprising a single species Fontanesia phillyreoides, though some authors split this into two species (see below).
 It is native to southern Europe (Sicily), southwestern Asia (Lebanon, Syria, Turkey) and eastern Asia (China), with two well-separated populations.
Calendula ( ), is a genus of about 15–20 species of annual and perennial herbaceous plants in the daisy family Asteraceae that are often known as marigolds.
 They are native to southwestern Asia, western Europe, Macaronesia, and the Mediterranean.
 Other plants are also known as marigolds, such as corn marigold, desert marigold, marsh marigold, and plants of the genus "Tagetes".
Calendula officinalis (pot marigold, ruddles, common marigold or Scotch marigold) is a plant in the genus "Calendula" of the family Asteraceae.
 It is probably native to southern Europe, though its long history of cultivation makes its precise origin unknown, and it may possibly be of garden origin.
 It is also widely naturalised further north in Europe (north to southern England) and elsewhere in warm temperate regions of the world.
Michauxia is a genus of plants in the Campanulaceae.
 It contains 7 known species native to southwestern Asia.

Question: What genus of plants is native to southwestern Asia, Cassiope or Calendula?
Answer: Calendula