Bupleurum is a large genus of annual or perennial herbs or woody shrubs, with about one hundred and ninety species, belonging to the Apiaceae family.
 The full size of its species may vary between a few cm to up to 3 m high.
 Their compound umbels of small flowers are adorned with bracteoles that are sometimes large and may play a role in attracting pollinators.
 Rare among Apiaceae are the simple leaves, bracts (if present) and bracteoles.
 The genus is almost exclusively native in the Old World Northern Hemisphere, with one species native to North America and one species native to southern Africa.
Bupleurum dianthifolium is a species of flowering plant in the Apiaceae family.
Bupleurum lancifolium is a species of flowering plant in the carrot family known by the common name lanceleaf thorow-wax.
 It is native to the Mediterranean Basin and it is known elsewhere, including parts of North America, as an introduced species.
 It grows up to 50 centimeters tall with a hairless, waxy stem around which leaves are fused at their bases.
 The dull, waxy, deep green leaves are narrowly lance-shaped to nearly oval and 3 to 10 centimeters long.
 The inflorescence is a compound umbel borne on a peduncle which may be several centimeters tall.
 The umbel is surrounded by five wide, round to oval and sometimes pointed bractlets at the base.
 The flowers are yellow to yellow-green.
Bupleurum elatum is a species of flowering plant in the Apiaceae family.
Bupleurum kakiskalae is a species of flowering plant in the Apiaceae family.
Corokia is a genus in the Argophyllaceae family comprising about ten species native to New Zealand and one native to Australia.
 "Corokia" species are shrubs or small trees with zigzagging (divaricating) branches.
 In fact, "Corokia cotoneaster" is commonly known as "wire-netting bush".
 The stems of the shrubs are dark when mature, covered with downy or silky hairs (tomentum) when young.
 In spring, they produce clusters of small, star shaped yellow blossoms.
 Berries are red or yellow.
 The shrubs prefer forests and rocky areas, sun or light shade, reasonably well drained soil, and moderate watering.
Bupleurum falcatum, also known as sickle-leaved hare's-ear, Chinese thoroughwax, sickle hare's ear and sickle-leaf hare's ear, is a species of flowering plant in the Apiaceae family.
Bupleurum fruticosum or shrubby hare's-ear is a species of flowering plant in the Apiaceae family.
Pierre Chrétien (1846 – 15 June 1934, Nay, Pyrénées-Atlantiques) was a French entomologist who specialised in Lepidoptera.
 He was a Member of Société entomologique de France."
Trifurcula chretieni" Z. & A. Lastuvka & van Nieukerken, 2013 is "named in honour of Pierre Chrétien (1846–1934), who discovered nepticulid mines on Bupleurum, including those on "Bupleurum rigidum", and the first author to describe a number of Mediterranean species that are now placed in "Trifurcula" ("Glaucolepis")."

Question: Which of Bupleurum and Corokia has more species?
Answer: Bupleurum