Question: Are Sparaxis and Cotula both a genus of the same family?

full_context: Document 1: Sparaxis bulbifera: Sparaxis bulbifera, commonly known as harlequin flower, is a bulb-forming perennial plant. The species is native to Cape Province in South Africa and naturalised in the Azores and Australia. It grows to between 15 and 60 cm high and has white to cream flowers.
Document 2: Hypoxis: Hypoxis is a genus of flowering plants belonging to the family Hypoxidaceae. The genus has an "almost cosmopolitan" distribution, occurring in Africa, the Americas, Asia, and Australia. Europe lacks native species. Most species are in the Southern Hemisphere, especially in southern Africa. Common names for the genus include star-grass, star lily, yellow stars, African potato, and stars. The genus is the largest of the Hypoxidaceae family and has its centre of variation in South Africa, where it occurs in open undisturbed grasslands. The name "Hypoxis" was taken over by Linnaeus in 1759 from a name coined by Paul Reneaulme in 1611 for a superficially similar species of "Gagea" and meaning "a little sour", referring to the taste of that plant's leaves.
Document 3: Sparaxis tricolor: Sparaxis tricolor, known by the common names wandflower, harlequin flower, and sparaxis, is a bulb-forming perennial plant that grows in well-drained sunny soil. It gained its name from its colorful flowers which are bi- or tri-coloured with a golden centre and a small ring of brown surrounded by another colour.
Document 4: Crocus: Crocus (English plural: crocuses or croci) is a genus of flowering plants in the iris family comprising 90 species of perennials growing from corms. Many are cultivated for their flowers appearing in autumn, winter, or spring. The spice saffron is obtained from the stigmas of "Crocus sativus", an autumn-blooming species. Crocuses are native to woodland, scrub, and meadows from sea level to alpine tundra in central and southern Europe, North Africa and the Middle East, on the islands of the Aegean, and across Central Asia to Xinjiang Province in western China.
Document 5: Calendula: 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".
Document 6: Melasphaerula: Melasphaerula is a genus of flowering plants in the family Iridaceae, first described as a genus in 1803. There is only one known species, Melasphaerula graminea, native to Namibia and the Cape Province in South Africa.
Document 7: Dimorphotheca sinuata: Dimorphotheca sinuata, the glandular Cape marigold, Namaqualand daisy, or orange Namaqualand daisy; syn. "Dimorphotheca aurantiaca" hort.) is an African species of plants native to southern Africa. It is also widely cultivated as an ornamental and naturalized in parts of the United States, primarily California and Arizona.
Document 8: Erigeron compactus: Erigeron compactus is a species of flowering plant in the daisy family known by the common names cushion daisy, fernleaf fleabane, and compact daisy.
Document 9: Centaurea: Centaurea ( ) is a genus of between 350 and 600 species of herbaceous thistle-like flowering plants in the family Asteraceae. Members of the genus are found only north of the equator, mostly in the Eastern Hemisphere; the Middle East and surrounding regions are particularly species-rich. Common names for this genus are centaury, centory, starthistles, knapweeds, centaureas and the more ambiguous "bluets"; a vernacular name used for these plants in parts of England is "loggerheads" (common knapweed). The "Plectocephalus" group – possibly a distinct genus – is known as basketflowers. "Cornflowers" is used for a few species, but that term more often specifically means "C. cyanus" (sometimes also called "basket flower"). The common name "centaury" is sometimes used, although this also refers to the unrelated plant genus "Centaurium".
Document 10: Colobanthus: Colobanthus is a large genus of small, cushion-like herbaceous plants, sometimes known as "pearlworts", a name they share with plants of the related genus "Sagina". "C. quitensis" is the world's southernmost dicot, and one of only two original flowering plants of Antarctica.
Document 11: Geissorhiza: Geissorhiza is a genus of about 80 species of deciduous perennial flowering plants in the iris family first described as a genus in 1803. The entire genus is endemic to Cape Province of western South Africa. The genus name is derived from the Greek words "geisson", meaning "tile", and "rhizon", meaning "root".
Document 12: Sparaxis: Sparaxis (harlequin flower) is a genus in the family Iridaceae with about 13 species endemic to Cape Province, South Africa.
Document 13: Tridax procumbens: Tridax procumbens, commonly known as coatbuttons or tridax daisy, is a species of flowering plant in the daisy family. It is best known as a widespread weed and pest plant. It is native to the tropical Americas, but it has been introduced to tropical, subtropical, and mild temperate regions worldwide. It is listed as a noxious weed in the United States and has pest status in nine states.
Document 14: Carduus: Carduus is a genus of flowering plants in the aster family, Asteraceae, and the tribe Cynareae, one of two genera considered to be true thistles, the other being "Cirsium". Plants of the genus are known commonly as plumeless thistles. They are native to Eurasia and Africa, and several are known elsewhere as introduced species. This genus is noted for its disproportionately high number of noxious weeds compared to other flowering plant genera.
Document 15: Cotula: Cotula is a genus of flowering plant in the sunflower family. It includes plants known generally as water buttons or buttonweeds.
ground_truth: yes