Nymphaea nouchali, often known by its synonym Nymphaea stellata, or by common names blue lotus, star lotus, red and blue water lily, blue star water lily or manel flower is a water lily of genus "Nymphaea".
 It is native to southern and eastern parts of Asia, and is the national flower of Sri Lanka and Bangladesh.
 This species is sometimes considered to include the blue Egyptian lotus "Nymphaea caerulea".
 In the past, taxonomic confusion has occurred, with the name "Nymphaea nouchali" incorrectly applied to "Nymphaea pubescens".
Nymphaea mexicana is a species of aquatic plant that is native to the Southern United States and Mexico as far south as Michoacán.
 Common names include yellow waterlily, Mexican waterlily and banana waterlily.
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.
Nymphaea is a genus of hardy and tender aquatic plants in the family Nymphaeaceae.
 The genus has a cosmopolitan distribution.
 Many species are cultivated as ornamental plants, and many cultivars have been bred.
 Some taxa occur as introduced species where they are not native, and some are weeds. Plants of the genus are known commonly as water lilies.
 The genus name is from the Greek νυμφαια, "nymphaia" and the Latin "nymphaea", which mean "water lily" and were inspired by the nymphs of Greek and Latin mythology.
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.

Question: what does Nymphaea and Bupleurum have in common?
Answer: genus