Plantago hawaiensis is a rare species of flowering plant in the plantain family known by the common name Hawaiian plantain.
 It is endemic to Hawaii, where it is known only from the island of Hawaii.
 It grows on the slopes of Mauna Loa and Hualalai.
 Like other Hawaiian "Plantago", it is known as kuahiwi laukahi.
 It is a federally listed endangered species of the United States.
Metasequoia occidentalis is an extinct redwood species of the family Cupressaceae that is found as fossils throughout the Northern Hemisphere.
 It is one of three extinct species of "Metasequoia" that are currently recognized as valid.
Metasequoia glyptostroboides, the dawn redwood, is a fast-growing, endangered deciduous conifer, the sole living species of the genus "Metasequoia", one of three species in the subfamily Sequoioideae.
 It is native to Lichuan county in the Hubei province of China.
 Although shortest of the redwoods, it can grow to at least 200 ft in height.
Plantago rugelii is a species of flowering plant in the plantain family, Plantaginaceae.
 It is native to North America, where it occurs in eastern Canada and the central and eastern United States.
 Its common names include American plantain, blackseed plantain, pale plantain, and Rugel's plantain.
 The generic name "Plantago" is from the Latin "planta" ("footprint") and the species name "rugelii" honors Ferdinand Ignatius Xavier Rugel (1806-1879), a German-born botanist and pharmacist.
Plantago princeps is a rare species of flowering plant in the plantain family known by the common name ale.
 It is endemic to Hawaii, where it is known from the islands of Hawaii, Kauai, Oahu, Molokai, and Maui.
 Like other Hawaiian "Plantago", it is known as kuahiwi laukahi, or laukahi kuahiwi.
 It is a federally listed endangered species of the United States.
Plantago cretica is a species of "Plantago", family Plantaginaceae.
Metasequoia foxii is an extinct redwood species in the family Cupressaceae described from numerous fossils of varying growth stage.
 The species is solely known from the Paleocene sediments exposed in central Alberta, Canada.
 It is one of three extinct species belonging to the redwood genus "Metasequoia".
Plantago media, known as the hoary plantain, is a species of flowering plant in the plantain family Plantaginaceae.
 It is native to central and western Europe, including Great Britain and introduced to parts of the north-east United States.
 Its generic name is derived from the Latin for sole; like other members of the genus "Plantago", it should not be confused with the unrelated plantain, a starchy banana.
Plantago is a genus of about 200 species of small, inconspicuous plants commonly called plantains or fleaworts.
 The common name plantain is shared with the unrelated cooking plantain, a kind of banana.
 Most are herbaceous plants, though a few are subshrubs growing to 60 cm tall.
Metasequoia (dawn redwood) is a fast-growing, deciduous tree, and the sole living species, "Metasequoia glyptostroboides", is one of three species of conifers known as redwoods.
 It is native to Lichuan county in Hubei province, China.
 Although the least tall of the redwoods, it grows to at least 200 feet (60 meters) in height.
 Local villagers refer to the original tree from which most others derive as "Shui-sa", or "water fir", which is part of a local shrine.
 Since its rediscovery in 1944, the dawn redwood has become a popular ornamental.

Question: What refers to more species, Plantago or Metasequoia?
Answer: Plantago