Crocus flavus, known as yellow crocus or Dutch yellow crocus, is a species of flowering plant of the "Crocus" genus in the Iridaceae family.
 It grows wild on the slopes of Greece, former Yugoslavia, Bulgaria, Romania and northwestern Turkey, with fragrant bright orange-yellow flowers which Tennyson likened to a fire.
 It is a small crocus (5 - , despite the names of some cultivars, compared to the Giant Dutch crocuses ("C. vernus").
 Its cultivars are used as ornamental plants.
Persea is a genus of about 150 species of evergreen trees belonging to the laurel family, Lauraceae.
 The best-known member of the genus is the avocado, "P. americana", widely cultivated in subtropical regions for its large, edible fruit.
Crocus sativus, commonly known as saffron crocus, or autumn crocus, is a species of flowering plant of the "Crocus" genus in the Iridaceae family.
 It is best known for producing the spice saffron from the filaments that grow inside the flower.
 The term of " 'autumn crocus' " is also mistakenly used for flowers in the Colchicum species.
 However, crocuses have 3 stamens and 1 style, while colchicum have 6 stamens and 3 styles and are toxic.
Crocus goulimyi (fall crocus) is a species of flowering plant in the genus "Crocus" and the family Iridaceae.
 It is endemic to Greece.
 It is a cormous perennial growing to 10 cm tall.
 The small, rounded, lilac flowers with paler throats appear in autumn.
Crocus biflorus, the silvery crocus, is a species of flowering plant in the genus "Crocus" of the family Iridaceae, native to southeastern Europe and southwestern Asia, including Italy, the Balkans, Ukraine, Turkey, Caucasus, Iraq, and Iran.
 It is a cormous perennial growing to 6 cm tall and wide.
 It is a highly variable species, with flowers in shades of pale mauve or white, often with darker stripes on the outer tepals.
 The flowers appear early in spring.
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.
Crocus chrysanthus (snow crocus, golden crocus) is a species of flowering plant of the "Crocus" genus in the family Iridaceae.
 Native to the Balkans and Turkey, it bears vivid orange-yellow bowl-shaped flowers.
 It has smaller corms and a smaller flower than the giant Dutch crocus ("Crocus vernus"), although it produces more flowers per bulb than the latter.
 Its common name, "snow crocus", derives from its exceptionally early flowering period, blooming about two weeks before the giant crocus, and often emerging through the snow in late winter or early spring.
 The leaves are narrow with a silver central stripe.
 Height: 3 - .
Crocus angustifolius, syn.
 "C. susianus" (cloth-of-gold crocus) is a species of flowering plant in the genus "Crocus" of the family Iridaceae, native to southern Ukraine and Armenia.
 It is a cormous perennial growing to 5 cm tall and wide.
 The narrow grass-like leaves with silver central stripe appear in late winter or early spring.
 They are followed by bright yellow fragrant flowers with maroon blotches on the outer petals.
Crocus ligusticus is a herbaceous perennial plant belonging to the genus Crocus of the Iridaceae family.
 The Genus nane "Crocus" is a Chaldean name meaning "saffron", while the specific Latin name "ligusticus", meaning "ligurian", refers to the distribution area of this species.
Crocus speciosus, with common name Bieberstein's crocus, is a species of flowering plant in the genus "Crocus" of the family Iridaceae.
 The plant is native to northern and central Turkey, the Caucasus, northern Iran, Crimea.

Question: Which genus has more species Persea or Crocus ?
Answer: Persea