Reichardia is a genus of plants in the dandelion tribe within the daisy family native to the Mediterranean and western Asia.
 In Crete, Greece the leaves and tender shoots of a variety of "Reichardia picroides" called "galatsida " (γαλατσίδα ) are eaten raw, boiled, cooked in steam or browned with olive oil by the locals.
 Brighteyes is a common name for plants in this genus.
Sclerocarpus is a genus of flowering plants in the sunflower tribe within the daisy family.
 Bonebract is a common name for plants in this genus.
Serratula is a genus of plants in the thistle tribe within the daisy family native to Eurasia.
 Plumeless saw-wort is a common name for plants in this genus.
 "Serratula" as traditionally defined contains at least two groups: one of which is basal within the subtribe Centaureinae and one of which is derived; the former group can be moved to the genus "Klasea".
Auranticarpa is a genus of trees in the family Pittosporaceae.
Rhodanthe, also known as sunray or pink paper daisy, is a genus of Australian plants in the pussy's-toes tribe within the daisy family.
Erigeron ( ) is a large genus of plants in the daisy family.
 It is sometimes confused with other closely related genera, "Aster" and the true daisy "Bellis".
 The genus has a cosmopolitan distribution in dry, mountainous areas and grassland, with the highest diversity in North America.
Silphium is a genus of North American plants in the sunflower tribe within the daisy family.
Tetraneuris, commonly known as four-nerve daisy or bitterweed, is a genus of North American plants in the sneezeweed tribe within the daisy family.
Apiaceae or Umbelliferae, is a family of mostly aromatic flowering plants named after the type genus "Apium" and commonly known as the celery, carrot or parsley family.
 It is the 16th-largest family of flowering plants, with more than 3,700 species in 434 genera including such well-known and economically important plants such as angelica, anise, asafoetida, caraway, carrot, celery, chervil, coriander, cumin, dill, fennel, hemlock, lovage, cow parsley, parsley, parsnip, sea holly, giant hogweed and silphium (a plant whose identity is unclear and which may be extinct).
Iva is a genus of wind-pollinated plants in the daisy family, described as a genus by Linnaeus in 1753.
 Plants of this genus are known generally as marsh elders.
 The genus is native to North America.

Question: Which is a genus of plants within the daisy family, Auranticarpa or Silphium?
Answer: Silphium